From patchwork Thu Feb 15 16:52:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558845 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8CDACC4829E for ; Thu, 15 Feb 2024 16:53:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AKeNFR+9z0zoahD9mY74ugbcixzoy7z3NsZu/G7a/uQ=; b=26MS96wgnJkcE5 BmMw3ExFMOkhq8u/p+1oo5AM+4eZDQ7lE0KqPuwkMkBq/iHqdCwGilKEWLMVz6va+P0SbHSVDBOHD W1gZEFz4vf2zDtCYwpu29On/ILU6AOg1EyORLVMOyvkQEDXoX0yJ0BHUczIwFgtURxPz2b6uleLvr IVxUESntL+IguBFUTCQJ5a3BVojMRNBphSMhiw6VVV4/1COR/d2jk00QSp/Ky9hujZ0oHwaLuYqxl VhgUkhNQklhOVoLBmFLMlf0ka914ohmXQD9+YOkLjrwnty628ImU1e0XgzTyF9v/U7zQyM5hQPphn hvibUvGzdFhIVMvMncMw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyf-0000000H3NH-34g1; Thu, 15 Feb 2024 16:52:50 +0000 Received: from relay4-d.mail.gandi.net ([2001:4b98:dc4:8::224]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyT-0000000H3Dj-3Vdu for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:43 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 3CE20E0014; Thu, 15 Feb 2024 16:52:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015953; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G6Tnp2unso4XKazSiaHxm91hgMMt9GxFy8ctCox1SvU=; b=JP1M/bpk9bS3ep85U+nbtsJhPr5WGZqySKANmguhxV3YSIYrvZOMDOgVZeA87geAQb9jUf 6P8LNCHsKt8QUIE0xct6uroeEAxUrm0RnZoZU9QkzvinQmkyl+wvbIvJhFYjYFUnS3EQfW +ttcLLGBR++EuNY+uVTPqcfrrC1xAq3oqBCRyLXthyVpK13mzESZMdzptdcKUQCYJCVUl0 /O8bECxGAPEQmIo/w+2nhxKiDkWnHWewJiB4pDCQ6IeflfDVIPkHpTsqxf212e96mkqdyS AkREzWfipVxO/lnFPW66vP4sJQf7RsOoaHSfxsT+hRK5di/BTcrbsbktdq1A6g== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:08 +0100 Subject: [PATCH 01/13] dt-bindings: i2c: nomadik: add timeout-usecs property bindings MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-1-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085238_119931_6C87B4B5 X-CRM114-Status: UNSURE ( 7.67 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Expose I2C device timeout configuration from devicetree. Use µs as time unit and express it in the name. Signed-off-by: Théo Lebrun Reviewed-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml index 16024415a4a7..e6b95e3765ac 100644 --- a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml @@ -70,6 +70,10 @@ properties: minimum: 1 maximum: 400000 + timeout-usecs: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Timeout on I2C xfers in µs. + required: - compatible - reg @@ -98,6 +102,7 @@ examples: clock-names = "i2cclk", "apb_pclk"; power-domains = <&pm_domains DOMAIN_VAPE>; resets = <&prcc_reset DB8500_PRCC_3 DB8500_PRCC_3_RESET_I2C0>; + timeout-usecs = <200000>; }; i2c@101f8000 { From patchwork Thu Feb 15 16:52:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558846 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 41924C48BC4 for ; Thu, 15 Feb 2024 16:53:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Kx4DIskm0YLrnI7C2nouoz4bMiP1MlYxD0jaELzylu4=; b=dOXT7n2As7STyO WCRGCE4FuTnbzXyS41Ak3WcMgQa8ovSXJ/wKhPSy8XpFAbTkSfW0Fvhjc0Kes/T3IbdPqFNfj6PIT LkRtvfLV7dw+abiZUrG25Bd9OP4C4RCo0tPN0rJFVBHSlPGKYX1CWEcx0zEPUBDZ8gSnl4SaGjcr9 h2chJwRVEXC60RG4rmql7fv+7JvanS19D2u09pGG/gwnh916OnwfubYrk24BSDK5RKGaSmhksnxRZ UV7oUVaTyBZ4EDLu8FmTt/qIOOavJIf8jFrJh7mOaaZGheLlp9hRoJ4FEUOytOhWOfpLbosoLQ6PB M6f6iLDEQddqd/tchhng==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeye-0000000H3Lu-0lzn; Thu, 15 Feb 2024 16:52:48 +0000 Received: from relay4-d.mail.gandi.net ([217.70.183.196]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyT-0000000H3Du-3Vgq for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:42 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id F0D07E000D; Thu, 15 Feb 2024 16:52:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015954; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7cLPcJTMJ7JxzGdy5rlF5zI68DecSO20reEkIrekyHo=; b=l50vrPRPj0n5yakq096garlZj22Yam4gfE7JxPoei3WBEOqIEPeo9GYdhiQKJqukq+LgmI uQ8jerdAEg2uJnLIbvOzwz9ETiDCjaLtlwkcp4kaGmYOlQ7epTBI0YYc+57pvTucbBOU3n k/rsShn7ujuo0XRBseBrQ2cuTKy2RaH63zQnOs2nzD/Nk2/l6qWEvRbH2pGqRI6l1r1kM6 nmDxo/Y/Xs4nr7MY6a7dtGJdXS3DvDZF3m78Jr37NsuHag71yAXmYSO9i3Sn0F+4i4Ac+3 wNZixGWyPElqSGHQeLnrocczYIxk/UEmG24Bha2KaiUECWg0P8/zuf5a5E4e5Q== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:09 +0100 Subject: [PATCH 02/13] dt-bindings: i2c: nomadik: add mobileye,eyeq5-i2c bindings and example MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-2-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085238_273958_05F8006C X-CRM114-Status: GOOD ( 10.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add EyeQ5 bindings to the existing Nomadik I2C dt-bindings. Add the two EyeQ5-specific properties behind a conditional. Add an example for this compatible. Signed-off-by: Théo Lebrun --- .../devicetree/bindings/i2c/st,nomadik-i2c.yaml | 44 ++++++++++++++++++++-- 1 file changed, 40 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml index e6b95e3765ac..eaade14b6d4c 100644 --- a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml @@ -14,9 +14,6 @@ description: The Nomadik I2C host controller began its life in the ST maintainers: - Linus Walleij -allOf: - - $ref: /schemas/i2c/i2c-controller.yaml# - # Need a custom select here or 'arm,primecell' will match on lots of nodes select: properties: @@ -24,6 +21,7 @@ select: contains: enum: - st,nomadik-i2c + - mobileye,eyeq5-i2c required: - compatible @@ -39,6 +37,10 @@ properties: - const: stericsson,db8500-i2c - const: st,nomadik-i2c - const: arm,primecell + # The variant found on Mobileye EyeQ5 + - items: + - const: mobileye,eyeq5-i2c + - const: arm,primecell reg: maxItems: 1 @@ -55,7 +57,7 @@ properties: - items: - const: mclk - const: apb_pclk - # Clock name in DB8500 + # Clock name in DB8500 or EyeQ5 - items: - const: i2cclk - const: apb_pclk @@ -83,6 +85,25 @@ required: unevaluatedProperties: false +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + - if: + properties: + compatible: + contains: + const: mobileye,eyeq5-i2c + then: + properties: + mobileye,olb: + $ref: /schemas/types.yaml#/definitions/phandle + description: A phandle to the OLB syscon. + mobileye,id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Platform-wide controller ID (integer starting from zero). + required: + - mobileye,olb + - mobileye,id + examples: - | #include @@ -116,5 +137,20 @@ examples: clocks = <&i2c0clk>, <&pclki2c0>; clock-names = "mclk", "apb_pclk"; }; + - | + #include + i2c@300000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0x300000 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <0>; + }; ... From patchwork Thu Feb 15 16:52:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558847 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9EC62C4829E for ; Thu, 15 Feb 2024 16:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=eJxrsWa6/t5s+q4J+YdgweqhLZB7igO6eGjTqWzBgsI=; b=fZzSVhyRvkI78J UEj/c7AGbkhIL/WDnxdx83bfeLXWmEBrA54GJw8bF6iz4c4zbLQ2XZkFhU9f/Hd+K51kdk58r9L7J GBELA8kUdBy5XjpJHgaU0oGUVdXsijffHrQPzxHeFo6jcaN0olaUYKmuwIh157NU7/wNL4Ii6Nipd ERUmSQPpQd6F5G55kfzx733lipHuqZm0JEww9uwf57KTuVORmn0SPr4EOgXZ3IK8Viw1z2WjXXbdC lgck+xf5c1OaCgL1RjHesf9U4AAXevhzABC/J3Flsp6ol4duSjioY8NvMaq5gpoNF+eCMjC4516Ue VhfRoL0whzRXmj/J2nJw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyj-0000000H3Pj-49fP; Thu, 15 Feb 2024 16:52:53 +0000 Received: from relay4-d.mail.gandi.net ([217.70.183.196]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyU-0000000H3EZ-0P8J for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:44 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id AB00BE0008; Thu, 15 Feb 2024 16:52:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015955; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ribMBPqXMF0NG1bmqS6MEZxQmeMHwKGVz7dwwg0eqZ0=; b=kWG7BC12XnwCMtgu8iNlZZ1k883FJfp/4NLueKs5RUtF4zoIBip8jNQPyQ2nfFyywkg+Ct x7u6YMzdUP7Aek/2T28DCeM7AR36ForU5LFQSzqhztJE5vpTccmvPpLiq3aB7cBPtfghEa RMtYir9OIFLeCD7xfH0ZdyV1Sb5vzqaDOEpGzWBQsL4LxYQfiKaVjSie831y6qQsDCpPXj hnytIyxnYl4hGDJxv9TD+WzkIgC6Du7os7sLCI0BYfGCu6VaPQnYo7qZV0Kskr98lWHwgq m29O/jQMpd0C7GFvFjYv5sUqrYdqGUzuvlUsHky+YcOKJbtHhnq0bUUWksJs6g== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:10 +0100 Subject: [PATCH 03/13] dt-bindings: hwmon: lm75: add label property MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-3-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= , Jean Delvare , Guenter Roeck , linux-hwmon@vger.kernel.org X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085238_441294_0C8FD354 X-CRM114-Status: UNSURE ( 8.04 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Declare optional label devicetree property. Show usage in one example with dummy name. To: Jean Delvare To: Guenter Roeck Cc: Signed-off-by: Théo Lebrun Reviewed-by: Krzysztof Kozlowski --- Documentation/devicetree/bindings/hwmon/lm75.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/lm75.yaml b/Documentation/devicetree/bindings/hwmon/lm75.yaml index ed269e428a3d..5ca2c83b413d 100644 --- a/Documentation/devicetree/bindings/hwmon/lm75.yaml +++ b/Documentation/devicetree/bindings/hwmon/lm75.yaml @@ -52,6 +52,9 @@ properties: interrupts: maxItems: 1 + label: + description: user-facing name of the hardware monitor + required: - compatible - reg @@ -83,6 +86,7 @@ examples: compatible = "st,stlm75"; reg = <0x48>; vs-supply = <&vs>; + label = "CPU temp"; }; }; - | From patchwork Thu Feb 15 16:52:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 499D1C48BC4 for ; Thu, 15 Feb 2024 16:54:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=eSPUotZ2Udkr8L7ltKKpHn7NLGEzA9+LE/ftQ0H7UiM=; b=TntayeqBVh0SZa t07t2ch5CyrM+psbbqVoxPTVu8TrYpfyDtgQSOBGht33bSI4M339xGuYwfRIgybmJzPo+3vp3OynT MIMOQNUKXKwBrcRvqvWMNasg9l63uukBluEISBHliYMmaYz94dI0Y/bVdKw7NqCKj7UwWfLDouaHA It50mMmXj0WorVCq1Mc2+QlRppbxIGMc3qufdHiBvFhSH/w3Yxk1HQu07HlLCThNQhYpdCK2rH6AZ ulQs22RObQODoZRGkTglX5GJU+/zCT4wjHo3ZhlgZ3mfxkbO+3zgkD+u/wwjireKwRFZhSHeLjq4o 043z5eSao61DYzS4RXlA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raf01-0000000H4AD-1zAd; Thu, 15 Feb 2024 16:54:13 +0000 Received: from relay4-d.mail.gandi.net ([2001:4b98:dc4:8::224]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyU-0000000H3Em-3vqg for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:47 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 80490E001A; Thu, 15 Feb 2024 16:52:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015956; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hyH7SfeXxPg/LI+DuoNNLyUBD7ArBeMQtzlwIGbNgAw=; b=XcCCPME7Zq+RNpxDFty9Koiyfd/VyLwkXa2xaZWAF7LABHuKTpaUT9djezrpdaLPGUldFz Px4FJzAlrIXKcv2J78oYomU8lHBUO/EqkUoyJn2cxDw3SHrrAoqdb/cmaxYMH7cC45ufN/ THGlJr/QqYisQg9xUFsJiMkOdKFfLv6aa0TDzftq1gYFf9fBYuuyrfTUhQehOCdgbXiXTl 5x37KB6fgHPEWDLZ2tGVEvWYQYu/1BXd0x1UTvxAKR3phPR5AaTZNmJjGMWmw+aeou1NEi vVpAisTkVWImhzfB6CiZowxTo3jmH00Y4/o0LxttZYVf/wH8NthFdSLVfOwxMA== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:11 +0100 Subject: [PATCH 04/13] i2c: nomadik: rename private struct pointers from dev to priv MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-4-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085239_391153_F26242C9 X-CRM114-Status: GOOD ( 26.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Disambiguate the usage of dev as a variable name; it is usually best to keep it reserved for struct device pointers. Avoid having multiple names for the same struct pointer (previously: dev, nmk, nmk_i2c). Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 428 +++++++++++++++++++-------------------- 1 file changed, 214 insertions(+), 214 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index b10574d42b7a..cd511c884f99 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -206,12 +206,12 @@ static inline void i2c_clr_bit(void __iomem *reg, u32 mask) /** * flush_i2c_fifo() - This function flushes the I2C FIFO - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver * * This function flushes the I2C Tx and Rx FIFOs. It returns * 0 on successful flushing of FIFO */ -static int flush_i2c_fifo(struct nmk_i2c_dev *dev) +static int flush_i2c_fifo(struct nmk_i2c_dev *priv) { #define LOOP_ATTEMPTS 10 int i; @@ -224,19 +224,19 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev) * bits, until then no one must access Tx, Rx FIFO and * should poll on these bits waiting for the completion. */ - writel((I2C_CR_FTX | I2C_CR_FRX), dev->virtbase + I2C_CR); + writel((I2C_CR_FTX | I2C_CR_FRX), priv->virtbase + I2C_CR); for (i = 0; i < LOOP_ATTEMPTS; i++) { - timeout = jiffies + dev->adap.timeout; + timeout = jiffies + priv->adap.timeout; while (!time_after(jiffies, timeout)) { - if ((readl(dev->virtbase + I2C_CR) & + if ((readl(priv->virtbase + I2C_CR) & (I2C_CR_FTX | I2C_CR_FRX)) == 0) - return 0; + return 0; } } - dev_err(&dev->adev->dev, + dev_err(&priv->adev->dev, "flushing operation timed out giving up after %d attempts", LOOP_ATTEMPTS); @@ -245,45 +245,45 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev) /** * disable_all_interrupts() - Disable all interrupts of this I2c Bus - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver */ -static void disable_all_interrupts(struct nmk_i2c_dev *dev) +static void disable_all_interrupts(struct nmk_i2c_dev *priv) { u32 mask = IRQ_MASK(0); - writel(mask, dev->virtbase + I2C_IMSCR); + writel(mask, priv->virtbase + I2C_IMSCR); } /** * clear_all_interrupts() - Clear all interrupts of I2C Controller - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver */ -static void clear_all_interrupts(struct nmk_i2c_dev *dev) +static void clear_all_interrupts(struct nmk_i2c_dev *priv) { u32 mask; mask = IRQ_MASK(I2C_CLEAR_ALL_INTS); - writel(mask, dev->virtbase + I2C_ICR); + writel(mask, priv->virtbase + I2C_ICR); } /** * init_hw() - initialize the I2C hardware - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver */ -static int init_hw(struct nmk_i2c_dev *dev) +static int init_hw(struct nmk_i2c_dev *priv) { int stat; - stat = flush_i2c_fifo(dev); + stat = flush_i2c_fifo(priv); if (stat) goto exit; /* disable the controller */ - i2c_clr_bit(dev->virtbase + I2C_CR, I2C_CR_PE); + i2c_clr_bit(priv->virtbase + I2C_CR, I2C_CR_PE); - disable_all_interrupts(dev); + disable_all_interrupts(priv); - clear_all_interrupts(dev); + clear_all_interrupts(priv); - dev->cli.operation = I2C_NO_OPERATION; + priv->cli.operation = I2C_NO_OPERATION; exit: return stat; @@ -294,15 +294,15 @@ static int init_hw(struct nmk_i2c_dev *dev) /** * load_i2c_mcr_reg() - load the MCR register - * @dev: private data of controller + * @priv: private data of controller * @flags: message flags */ -static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *dev, u16 flags) +static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *priv, u16 flags) { u32 mcr = 0; unsigned short slave_adr_3msb_bits; - mcr |= GEN_MASK(dev->cli.slave_adr, I2C_MCR_A7, 1); + mcr |= GEN_MASK(priv->cli.slave_adr, I2C_MCR_A7, 1); if (unlikely(flags & I2C_M_TEN)) { /* 10-bit address transaction */ @@ -313,7 +313,7 @@ static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *dev, u16 flags) * the extension (MSB bits) of the 7 bit address loaded * in A7 */ - slave_adr_3msb_bits = (dev->cli.slave_adr >> 7) & 0x7; + slave_adr_3msb_bits = (priv->cli.slave_adr >> 7) & 0x7; mcr |= GEN_MASK(slave_adr_3msb_bits, I2C_MCR_EA10, 8); } else { @@ -325,40 +325,40 @@ static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *dev, u16 flags) mcr |= GEN_MASK(0, I2C_MCR_SB, 11); /* check the operation, master read/write? */ - if (dev->cli.operation == I2C_WRITE) + if (priv->cli.operation == I2C_WRITE) mcr |= GEN_MASK(I2C_WRITE, I2C_MCR_OP, 0); else mcr |= GEN_MASK(I2C_READ, I2C_MCR_OP, 0); /* stop or repeated start? */ - if (dev->stop) + if (priv->stop) mcr |= GEN_MASK(1, I2C_MCR_STOP, 14); else mcr &= ~(GEN_MASK(1, I2C_MCR_STOP, 14)); - mcr |= GEN_MASK(dev->cli.count, I2C_MCR_LENGTH, 15); + mcr |= GEN_MASK(priv->cli.count, I2C_MCR_LENGTH, 15); return mcr; } /** * setup_i2c_controller() - setup the controller - * @dev: private data of controller + * @priv: private data of controller */ -static void setup_i2c_controller(struct nmk_i2c_dev *dev) +static void setup_i2c_controller(struct nmk_i2c_dev *priv) { u32 brcr1, brcr2; u32 i2c_clk, div; u32 ns; u16 slsu; - writel(0x0, dev->virtbase + I2C_CR); - writel(0x0, dev->virtbase + I2C_HSMCR); - writel(0x0, dev->virtbase + I2C_TFTR); - writel(0x0, dev->virtbase + I2C_RFTR); - writel(0x0, dev->virtbase + I2C_DMAR); + writel(0x0, priv->virtbase + I2C_CR); + writel(0x0, priv->virtbase + I2C_HSMCR); + writel(0x0, priv->virtbase + I2C_TFTR); + writel(0x0, priv->virtbase + I2C_RFTR); + writel(0x0, priv->virtbase + I2C_DMAR); - i2c_clk = clk_get_rate(dev->clk); + i2c_clk = clk_get_rate(priv->clk); /* * set the slsu: @@ -373,7 +373,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev) * slsu = cycles / (1000000000 / f) + 1 */ ns = DIV_ROUND_UP_ULL(1000000000ULL, i2c_clk); - switch (dev->sm) { + switch (priv->sm) { case I2C_FREQ_MODE_FAST: case I2C_FREQ_MODE_FAST_PLUS: slsu = DIV_ROUND_UP(100, ns); /* Fast */ @@ -388,15 +388,15 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev) } slsu += 1; - dev_dbg(&dev->adev->dev, "calculated SLSU = %04x\n", slsu); - writel(slsu << 16, dev->virtbase + I2C_SCR); + dev_dbg(&priv->adev->dev, "calculated SLSU = %04x\n", slsu); + writel(slsu << 16, priv->virtbase + I2C_SCR); /* * The spec says, in case of std. mode the divider is * 2 whereas it is 3 for fast and fastplus mode of * operation. TODO - high speed support. */ - div = (dev->clk_freq > I2C_MAX_STANDARD_MODE_FREQ) ? 3 : 2; + div = (priv->clk_freq > I2C_MAX_STANDARD_MODE_FREQ) ? 3 : 2; /* * generate the mask for baud rate counters. The controller @@ -406,10 +406,10 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev) * so set brcr1 to 0. */ brcr1 = 0 << 16; - brcr2 = (i2c_clk/(dev->clk_freq * div)) & 0xffff; + brcr2 = (i2c_clk / (priv->clk_freq * div)) & 0xffff; /* set the baud rate counter register */ - writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR); + writel((brcr1 | brcr2), priv->virtbase + I2C_BRCR); /* * set the speed mode. Currently we support @@ -417,125 +417,124 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev) * TODO - support for fast mode plus (up to 1Mb/s) * and high speed (up to 3.4 Mb/s) */ - if (dev->sm > I2C_FREQ_MODE_FAST) { - dev_err(&dev->adev->dev, + if (priv->sm > I2C_FREQ_MODE_FAST) { + dev_err(&priv->adev->dev, "do not support this mode defaulting to std. mode\n"); brcr2 = i2c_clk / (I2C_MAX_STANDARD_MODE_FREQ * 2) & 0xffff; - writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR); + writel((brcr1 | brcr2), priv->virtbase + I2C_BRCR); writel(I2C_FREQ_MODE_STANDARD << 4, - dev->virtbase + I2C_CR); + priv->virtbase + I2C_CR); } - writel(dev->sm << 4, dev->virtbase + I2C_CR); + writel(priv->sm << 4, priv->virtbase + I2C_CR); /* set the Tx and Rx FIFO threshold */ - writel(dev->tft, dev->virtbase + I2C_TFTR); - writel(dev->rft, dev->virtbase + I2C_RFTR); + writel(priv->tft, priv->virtbase + I2C_TFTR); + writel(priv->rft, priv->virtbase + I2C_RFTR); } /** * read_i2c() - Read from I2C client device - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver * @flags: message flags * * This function reads from i2c client device when controller is in * master mode. There is a completion timeout. If there is no transfer * before timeout error is returned. */ -static int read_i2c(struct nmk_i2c_dev *dev, u16 flags) +static int read_i2c(struct nmk_i2c_dev *priv, u16 flags) { int status = 0; u32 mcr, irq_mask; unsigned long timeout; - mcr = load_i2c_mcr_reg(dev, flags); - writel(mcr, dev->virtbase + I2C_MCR); + mcr = load_i2c_mcr_reg(priv, flags); + writel(mcr, priv->virtbase + I2C_MCR); /* load the current CR value */ - writel(readl(dev->virtbase + I2C_CR) | DEFAULT_I2C_REG_CR, - dev->virtbase + I2C_CR); + writel(readl(priv->virtbase + I2C_CR) | DEFAULT_I2C_REG_CR, + priv->virtbase + I2C_CR); /* enable the controller */ - i2c_set_bit(dev->virtbase + I2C_CR, I2C_CR_PE); + i2c_set_bit(priv->virtbase + I2C_CR, I2C_CR_PE); - init_completion(&dev->xfer_complete); + init_completion(&priv->xfer_complete); /* enable interrupts by setting the mask */ irq_mask = (I2C_IT_RXFNF | I2C_IT_RXFF | I2C_IT_MAL | I2C_IT_BERR); - if (dev->stop || !dev->vendor->has_mtdws) + if (priv->stop || !priv->vendor->has_mtdws) irq_mask |= I2C_IT_MTD; else irq_mask |= I2C_IT_MTDWS; irq_mask = I2C_CLEAR_ALL_INTS & IRQ_MASK(irq_mask); - writel(readl(dev->virtbase + I2C_IMSCR) | irq_mask, - dev->virtbase + I2C_IMSCR); + writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, + priv->virtbase + I2C_IMSCR); timeout = wait_for_completion_timeout( - &dev->xfer_complete, dev->adap.timeout); + &priv->xfer_complete, priv->adap.timeout); if (timeout == 0) { /* Controller timed out */ - dev_err(&dev->adev->dev, "read from slave 0x%x timed out\n", - dev->cli.slave_adr); + dev_err(&priv->adev->dev, "read from slave 0x%x timed out\n", + priv->cli.slave_adr); status = -ETIMEDOUT; } return status; } -static void fill_tx_fifo(struct nmk_i2c_dev *dev, int no_bytes) +static void fill_tx_fifo(struct nmk_i2c_dev *priv, int no_bytes) { int count; for (count = (no_bytes - 2); (count > 0) && - (dev->cli.count != 0); + (priv->cli.count != 0); count--) { /* write to the Tx FIFO */ - writeb(*dev->cli.buffer, - dev->virtbase + I2C_TFR); - dev->cli.buffer++; - dev->cli.count--; - dev->cli.xfer_bytes++; + writeb(*priv->cli.buffer, priv->virtbase + I2C_TFR); + priv->cli.buffer++; + priv->cli.count--; + priv->cli.xfer_bytes++; } } /** * write_i2c() - Write data to I2C client. - * @dev: private data of I2C Driver + * @priv: private data of I2C Driver * @flags: message flags * * This function writes data to I2C client */ -static int write_i2c(struct nmk_i2c_dev *dev, u16 flags) +static int write_i2c(struct nmk_i2c_dev *priv, u16 flags) { u32 status = 0; u32 mcr, irq_mask; unsigned long timeout; - mcr = load_i2c_mcr_reg(dev, flags); + mcr = load_i2c_mcr_reg(priv, flags); - writel(mcr, dev->virtbase + I2C_MCR); + writel(mcr, priv->virtbase + I2C_MCR); /* load the current CR value */ - writel(readl(dev->virtbase + I2C_CR) | DEFAULT_I2C_REG_CR, - dev->virtbase + I2C_CR); + writel(readl(priv->virtbase + I2C_CR) | DEFAULT_I2C_REG_CR, + priv->virtbase + I2C_CR); /* enable the controller */ - i2c_set_bit(dev->virtbase + I2C_CR, I2C_CR_PE); + i2c_set_bit(priv->virtbase + I2C_CR, I2C_CR_PE); - init_completion(&dev->xfer_complete); + init_completion(&priv->xfer_complete); /* enable interrupts by settings the masks */ irq_mask = (I2C_IT_TXFOVR | I2C_IT_MAL | I2C_IT_BERR); /* Fill the TX FIFO with transmit data */ - fill_tx_fifo(dev, MAX_I2C_FIFO_THRESHOLD); + fill_tx_fifo(priv, MAX_I2C_FIFO_THRESHOLD); - if (dev->cli.count != 0) + if (priv->cli.count != 0) irq_mask |= I2C_IT_TXFNE; /* @@ -543,23 +542,23 @@ static int write_i2c(struct nmk_i2c_dev *dev, u16 flags) * set the MTDWS bit (Master Transaction Done Without Stop) * to start repeated start operation */ - if (dev->stop || !dev->vendor->has_mtdws) + if (priv->stop || !priv->vendor->has_mtdws) irq_mask |= I2C_IT_MTD; else irq_mask |= I2C_IT_MTDWS; irq_mask = I2C_CLEAR_ALL_INTS & IRQ_MASK(irq_mask); - writel(readl(dev->virtbase + I2C_IMSCR) | irq_mask, - dev->virtbase + I2C_IMSCR); + writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, + priv->virtbase + I2C_IMSCR); timeout = wait_for_completion_timeout( - &dev->xfer_complete, dev->adap.timeout); + &priv->xfer_complete, priv->adap.timeout); if (timeout == 0) { /* Controller timed out */ - dev_err(&dev->adev->dev, "write to slave 0x%x timed out\n", - dev->cli.slave_adr); + dev_err(&priv->adev->dev, "write to slave 0x%x timed out\n", + priv->cli.slave_adr); status = -ETIMEDOUT; } @@ -568,28 +567,28 @@ static int write_i2c(struct nmk_i2c_dev *dev, u16 flags) /** * nmk_i2c_xfer_one() - transmit a single I2C message - * @dev: device with a message encoded into it + * @priv: device with a message encoded into it * @flags: message flags */ -static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags) +static int nmk_i2c_xfer_one(struct nmk_i2c_dev *priv, u16 flags) { int status; if (flags & I2C_M_RD) { /* read operation */ - dev->cli.operation = I2C_READ; - status = read_i2c(dev, flags); + priv->cli.operation = I2C_READ; + status = read_i2c(priv, flags); } else { /* write operation */ - dev->cli.operation = I2C_WRITE; - status = write_i2c(dev, flags); + priv->cli.operation = I2C_WRITE; + status = write_i2c(priv, flags); } - if (status || (dev->result)) { + if (status || priv->result) { u32 i2c_sr; u32 cause; - i2c_sr = readl(dev->virtbase + I2C_SR); + i2c_sr = readl(priv->virtbase + I2C_SR); /* * Check if the controller I2C operation status * is set to ABORT(11b). @@ -597,15 +596,15 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags) if (((i2c_sr >> 2) & 0x3) == 0x3) { /* get the abort cause */ cause = (i2c_sr >> 4) & 0x7; - dev_err(&dev->adev->dev, "%s\n", + dev_err(&priv->adev->dev, "%s\n", cause >= ARRAY_SIZE(abort_causes) ? "unknown reason" : abort_causes[cause]); } - (void) init_hw(dev); + init_hw(priv); - status = status ? status : dev->result; + status = status ? status : priv->result; } return status; @@ -663,24 +662,24 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, { int status = 0; int i; - struct nmk_i2c_dev *dev = i2c_get_adapdata(i2c_adap); + struct nmk_i2c_dev *priv = i2c_get_adapdata(i2c_adap); int j; - pm_runtime_get_sync(&dev->adev->dev); + pm_runtime_get_sync(&priv->adev->dev); /* Attempt three times to send the message queue */ for (j = 0; j < 3; j++) { /* setup the i2c controller */ - setup_i2c_controller(dev); + setup_i2c_controller(priv); for (i = 0; i < num_msgs; i++) { - dev->cli.slave_adr = msgs[i].addr; - dev->cli.buffer = msgs[i].buf; - dev->cli.count = msgs[i].len; - dev->stop = (i < (num_msgs - 1)) ? 0 : 1; - dev->result = 0; + priv->cli.slave_adr = msgs[i].addr; + priv->cli.buffer = msgs[i].buf; + priv->cli.count = msgs[i].len; + priv->stop = (i < (num_msgs - 1)) ? 0 : 1; + priv->result = 0; - status = nmk_i2c_xfer_one(dev, msgs[i].flags); + status = nmk_i2c_xfer_one(priv, msgs[i].flags); if (status != 0) break; } @@ -688,7 +687,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, break; } - pm_runtime_put_sync(&dev->adev->dev); + pm_runtime_put_sync(&priv->adev->dev); /* return the no. messages processed */ if (status) @@ -699,14 +698,14 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, /** * disable_interrupts() - disable the interrupts - * @dev: private data of controller + * @priv: private data of controller * @irq: interrupt number */ -static int disable_interrupts(struct nmk_i2c_dev *dev, u32 irq) +static int disable_interrupts(struct nmk_i2c_dev *priv, u32 irq) { irq = IRQ_MASK(irq); - writel(readl(dev->virtbase + I2C_IMSCR) & ~(I2C_CLEAR_ALL_INTS & irq), - dev->virtbase + I2C_IMSCR); + writel(readl(priv->virtbase + I2C_IMSCR) & ~(I2C_CLEAR_ALL_INTS & irq), + priv->virtbase + I2C_IMSCR); return 0; } @@ -723,17 +722,18 @@ static int disable_interrupts(struct nmk_i2c_dev *dev, u32 irq) */ static irqreturn_t i2c_irq_handler(int irq, void *arg) { - struct nmk_i2c_dev *dev = arg; + struct nmk_i2c_dev *priv = arg; + struct device *dev = &priv->adev->dev; u32 tft, rft; u32 count; u32 misr, src; /* load Tx FIFO and Rx FIFO threshold values */ - tft = readl(dev->virtbase + I2C_TFTR); - rft = readl(dev->virtbase + I2C_RFTR); + tft = readl(priv->virtbase + I2C_TFTR); + rft = readl(priv->virtbase + I2C_RFTR); /* read interrupt status register */ - misr = readl(dev->virtbase + I2C_MISR); + misr = readl(priv->virtbase + I2C_MISR); src = __ffs(misr); switch ((1 << src)) { @@ -741,20 +741,20 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) /* Transmit FIFO nearly empty interrupt */ case I2C_IT_TXFNE: { - if (dev->cli.operation == I2C_READ) { + if (priv->cli.operation == I2C_READ) { /* * in read operation why do we care for writing? * so disable the Transmit FIFO interrupt */ - disable_interrupts(dev, I2C_IT_TXFNE); + disable_interrupts(priv, I2C_IT_TXFNE); } else { - fill_tx_fifo(dev, (MAX_I2C_FIFO_THRESHOLD - tft)); + fill_tx_fifo(priv, (MAX_I2C_FIFO_THRESHOLD - tft)); /* * if done, close the transfer by disabling the * corresponding TXFNE interrupt */ - if (dev->cli.count == 0) - disable_interrupts(dev, I2C_IT_TXFNE); + if (priv->cli.count == 0) + disable_interrupts(priv, I2C_IT_TXFNE); } } break; @@ -768,60 +768,59 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) case I2C_IT_RXFNF: for (count = rft; count > 0; count--) { /* Read the Rx FIFO */ - *dev->cli.buffer = readb(dev->virtbase + I2C_RFR); - dev->cli.buffer++; + *priv->cli.buffer = readb(priv->virtbase + I2C_RFR); + priv->cli.buffer++; } - dev->cli.count -= rft; - dev->cli.xfer_bytes += rft; + priv->cli.count -= rft; + priv->cli.xfer_bytes += rft; break; /* Rx FIFO full */ case I2C_IT_RXFF: for (count = MAX_I2C_FIFO_THRESHOLD; count > 0; count--) { - *dev->cli.buffer = readb(dev->virtbase + I2C_RFR); - dev->cli.buffer++; + *priv->cli.buffer = readb(priv->virtbase + I2C_RFR); + priv->cli.buffer++; } - dev->cli.count -= MAX_I2C_FIFO_THRESHOLD; - dev->cli.xfer_bytes += MAX_I2C_FIFO_THRESHOLD; + priv->cli.count -= MAX_I2C_FIFO_THRESHOLD; + priv->cli.xfer_bytes += MAX_I2C_FIFO_THRESHOLD; break; /* Master Transaction Done with/without stop */ case I2C_IT_MTD: case I2C_IT_MTDWS: - if (dev->cli.operation == I2C_READ) { - while (!(readl(dev->virtbase + I2C_RISR) + if (priv->cli.operation == I2C_READ) { + while (!(readl(priv->virtbase + I2C_RISR) & I2C_IT_RXFE)) { - if (dev->cli.count == 0) + if (priv->cli.count == 0) break; - *dev->cli.buffer = - readb(dev->virtbase + I2C_RFR); - dev->cli.buffer++; - dev->cli.count--; - dev->cli.xfer_bytes++; + *priv->cli.buffer = + readb(priv->virtbase + I2C_RFR); + priv->cli.buffer++; + priv->cli.count--; + priv->cli.xfer_bytes++; } } - disable_all_interrupts(dev); - clear_all_interrupts(dev); + disable_all_interrupts(priv); + clear_all_interrupts(priv); - if (dev->cli.count) { - dev->result = -EIO; - dev_err(&dev->adev->dev, - "%lu bytes still remain to be xfered\n", - dev->cli.count); - (void) init_hw(dev); + if (priv->cli.count) { + priv->result = -EIO; + dev_err(dev, "%lu bytes still remain to be xfered\n", + priv->cli.count); + init_hw(priv); } - complete(&dev->xfer_complete); + complete(&priv->xfer_complete); break; /* Master Arbitration lost interrupt */ case I2C_IT_MAL: - dev->result = -EIO; - (void) init_hw(dev); + priv->result = -EIO; + init_hw(priv); - i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MAL); - complete(&dev->xfer_complete); + i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_MAL); + complete(&priv->xfer_complete); break; @@ -831,13 +830,13 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) * during the transaction. */ case I2C_IT_BERR: - dev->result = -EIO; + priv->result = -EIO; /* get the status */ - if (((readl(dev->virtbase + I2C_SR) >> 2) & 0x3) == I2C_ABORT) - (void) init_hw(dev); + if (((readl(priv->virtbase + I2C_SR) >> 2) & 0x3) == I2C_ABORT) + init_hw(priv); - i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_BERR); - complete(&dev->xfer_complete); + i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_BERR); + complete(&priv->xfer_complete); break; @@ -847,11 +846,11 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) * the Tx FIFO is full. */ case I2C_IT_TXFOVR: - dev->result = -EIO; - (void) init_hw(dev); + priv->result = -EIO; + init_hw(priv); - dev_err(&dev->adev->dev, "Tx Fifo Over run\n"); - complete(&dev->xfer_complete); + dev_err(dev, "Tx Fifo Over run\n"); + complete(&priv->xfer_complete); break; @@ -863,10 +862,10 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) case I2C_IT_RFSE: case I2C_IT_WTSR: case I2C_IT_STD: - dev_err(&dev->adev->dev, "unhandled Interrupt\n"); + dev_err(dev, "unhandled Interrupt\n"); break; default: - dev_err(&dev->adev->dev, "spurious Interrupt..\n"); + dev_err(dev, "spurious Interrupt..\n"); break; } @@ -893,9 +892,9 @@ static int nmk_i2c_resume_early(struct device *dev) static int nmk_i2c_runtime_suspend(struct device *dev) { struct amba_device *adev = to_amba_device(dev); - struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev); + struct nmk_i2c_dev *priv = amba_get_drvdata(adev); - clk_disable_unprepare(nmk_i2c->clk); + clk_disable_unprepare(priv->clk); pinctrl_pm_select_idle_state(dev); return 0; } @@ -903,10 +902,10 @@ static int nmk_i2c_runtime_suspend(struct device *dev) static int nmk_i2c_runtime_resume(struct device *dev) { struct amba_device *adev = to_amba_device(dev); - struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev); + struct nmk_i2c_dev *priv = amba_get_drvdata(adev); int ret; - ret = clk_prepare_enable(nmk_i2c->clk); + ret = clk_prepare_enable(priv->clk); if (ret) { dev_err(dev, "can't prepare_enable clock\n"); return ret; @@ -914,9 +913,9 @@ static int nmk_i2c_runtime_resume(struct device *dev) pinctrl_pm_select_default_state(dev); - ret = init_hw(nmk_i2c); + ret = init_hw(priv); if (ret) { - clk_disable_unprepare(nmk_i2c->clk); + clk_disable_unprepare(priv->clk); pinctrl_pm_select_idle_state(dev); } @@ -939,107 +938,108 @@ static const struct i2c_algorithm nmk_i2c_algo = { }; static void nmk_i2c_of_probe(struct device_node *np, - struct nmk_i2c_dev *nmk) + struct nmk_i2c_dev *priv) { /* Default to 100 kHz if no frequency is given in the node */ - if (of_property_read_u32(np, "clock-frequency", &nmk->clk_freq)) - nmk->clk_freq = I2C_MAX_STANDARD_MODE_FREQ; + if (of_property_read_u32(np, "clock-frequency", &priv->clk_freq)) + priv->clk_freq = I2C_MAX_STANDARD_MODE_FREQ; /* This driver only supports 'standard' and 'fast' modes of operation. */ - if (nmk->clk_freq <= I2C_MAX_STANDARD_MODE_FREQ) - nmk->sm = I2C_FREQ_MODE_STANDARD; + if (priv->clk_freq <= I2C_MAX_STANDARD_MODE_FREQ) + priv->sm = I2C_FREQ_MODE_STANDARD; else - nmk->sm = I2C_FREQ_MODE_FAST; - nmk->tft = 1; /* Tx FIFO threshold */ - nmk->rft = 8; /* Rx FIFO threshold */ - nmk->timeout = 200; /* Slave response timeout(ms) */ + priv->sm = I2C_FREQ_MODE_FAST; + priv->tft = 1; /* Tx FIFO threshold */ + priv->rft = 8; /* Rx FIFO threshold */ + priv->timeout = 200; /* Slave response timeout(ms) */ } static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) { int ret = 0; + struct nmk_i2c_dev *priv; struct device_node *np = adev->dev.of_node; - struct nmk_i2c_dev *dev; + struct device *dev = &adev->dev; struct i2c_adapter *adap; struct i2c_vendor_data *vendor = id->data; u32 max_fifo_threshold = (vendor->fifodepth / 2) - 1; - dev = devm_kzalloc(&adev->dev, sizeof(*dev), GFP_KERNEL); - if (!dev) + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) return -ENOMEM; - dev->vendor = vendor; - dev->adev = adev; - nmk_i2c_of_probe(np, dev); + priv->vendor = vendor; + priv->adev = adev; + nmk_i2c_of_probe(np, priv); - if (dev->tft > max_fifo_threshold) { - dev_warn(&adev->dev, "requested TX FIFO threshold %u, adjusted down to %u\n", - dev->tft, max_fifo_threshold); - dev->tft = max_fifo_threshold; + if (priv->tft > max_fifo_threshold) { + dev_warn(dev, "requested TX FIFO threshold %u, adjusted down to %u\n", + priv->tft, max_fifo_threshold); + priv->tft = max_fifo_threshold; } - if (dev->rft > max_fifo_threshold) { - dev_warn(&adev->dev, "requested RX FIFO threshold %u, adjusted down to %u\n", - dev->rft, max_fifo_threshold); - dev->rft = max_fifo_threshold; + if (priv->rft > max_fifo_threshold) { + dev_warn(dev, "requested RX FIFO threshold %u, adjusted down to %u\n", + priv->rft, max_fifo_threshold); + priv->rft = max_fifo_threshold; } - amba_set_drvdata(adev, dev); + amba_set_drvdata(adev, priv); - dev->virtbase = devm_ioremap(&adev->dev, adev->res.start, - resource_size(&adev->res)); - if (!dev->virtbase) + priv->virtbase = devm_ioremap(dev, adev->res.start, + resource_size(&adev->res)); + if (!priv->virtbase) return -ENOMEM; - dev->irq = adev->irq[0]; - ret = devm_request_irq(&adev->dev, dev->irq, i2c_irq_handler, 0, - DRIVER_NAME, dev); + priv->irq = adev->irq[0]; + ret = devm_request_irq(dev, priv->irq, i2c_irq_handler, 0, + DRIVER_NAME, priv); if (ret) - return dev_err_probe(&adev->dev, ret, - "cannot claim the irq %d\n", dev->irq); + return dev_err_probe(dev, ret, + "cannot claim the irq %d\n", priv->irq); - dev->clk = devm_clk_get_enabled(&adev->dev, NULL); - if (IS_ERR(dev->clk)) - return dev_err_probe(&adev->dev, PTR_ERR(dev->clk), + priv->clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(priv->clk)) + return dev_err_probe(dev, PTR_ERR(priv->clk), "could enable i2c clock\n"); - init_hw(dev); + init_hw(priv); - adap = &dev->adap; + adap = &priv->adap; adap->dev.of_node = np; - adap->dev.parent = &adev->dev; + adap->dev.parent = dev; adap->owner = THIS_MODULE; adap->class = I2C_CLASS_DEPRECATED; adap->algo = &nmk_i2c_algo; - adap->timeout = msecs_to_jiffies(dev->timeout); + adap->timeout = msecs_to_jiffies(priv->timeout); snprintf(adap->name, sizeof(adap->name), "Nomadik I2C at %pR", &adev->res); - i2c_set_adapdata(adap, dev); + i2c_set_adapdata(adap, priv); - dev_info(&adev->dev, + dev_info(dev, "initialize %s on virtual base %p\n", - adap->name, dev->virtbase); + adap->name, priv->virtbase); ret = i2c_add_adapter(adap); if (ret) return ret; - pm_runtime_put(&adev->dev); + pm_runtime_put(dev); return 0; } static void nmk_i2c_remove(struct amba_device *adev) { - struct nmk_i2c_dev *dev = amba_get_drvdata(adev); + struct nmk_i2c_dev *priv = amba_get_drvdata(adev); - i2c_del_adapter(&dev->adap); - flush_i2c_fifo(dev); - disable_all_interrupts(dev); - clear_all_interrupts(dev); + i2c_del_adapter(&priv->adap); + flush_i2c_fifo(priv); + disable_all_interrupts(priv); + clear_all_interrupts(priv); /* disable the controller */ - i2c_clr_bit(dev->virtbase + I2C_CR, I2C_CR_PE); + i2c_clr_bit(priv->virtbase + I2C_CR, I2C_CR_PE); } static struct i2c_vendor_data vendor_stn8815 = { From patchwork Thu Feb 15 16:52:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558848 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 46B65C48BC4 for ; Thu, 15 Feb 2024 16:53:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; 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Thu, 15 Feb 2024 16:52:44 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 4674AE001D; Thu, 15 Feb 2024 16:52:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015956; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hHgj/sUog/rIQGKTCVoK5NCE+i8l4ZPuQCIx37ekvXk=; b=dU6jtuPytIjrJ86JqQdnSkLy2orKj5Tn7kipaiTwv24WiH+am/zNL+XZ4M6MHWelu0N/iS Er9NbbIoONbESW4ObrKYr+kqMSy1gyK3dD5NMkBmprxyFB5Wf+uUyyG2H9yrDhSH078GPR NpOBGpN0wVmDdH0BdoCmj/FuYizDiyIEn1ZtupEGOSpirqPuD6tFqWEn/mAHTcAG8L2XKk WDSxOH0LGZWSl/aJG/vZTRbm+8ImntQv419T6ZuGT6B6w1wwau4fWUKpfIPMnaUCauNTst 2givAYmLI/XDKDRpy6K9XQECSrbF1QcSiwwzHkw/njAID0Y9MLAbe3LRe9FWyQ== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:12 +0100 Subject: [PATCH 05/13] i2c: nomadik: simplify IRQ masking logic MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-5-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085238_730066_EA92B387 X-CRM114-Status: GOOD ( 10.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org IRQ_MASK and I2C_CLEAR_ALL_INTS are redundant. One masks the top three bits off as reserved, the other one masks the reserved IRQs inside the u32. Get rid of IRQ_MASK and only use the most restrictive mask. Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index cd511c884f99..80bdf7e42613 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -94,9 +94,6 @@ /* some bits in ICR are reserved */ #define I2C_CLEAR_ALL_INTS 0x131f007f -/* first three msb bits are reserved */ -#define IRQ_MASK(mask) (mask & 0x1fffffff) - /* maximum threshold value */ #define MAX_I2C_FIFO_THRESHOLD 15 @@ -249,8 +246,7 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *priv) */ static void disable_all_interrupts(struct nmk_i2c_dev *priv) { - u32 mask = IRQ_MASK(0); - writel(mask, priv->virtbase + I2C_IMSCR); + writel(0, priv->virtbase + I2C_IMSCR); } /** @@ -259,9 +255,7 @@ static void disable_all_interrupts(struct nmk_i2c_dev *priv) */ static void clear_all_interrupts(struct nmk_i2c_dev *priv) { - u32 mask; - mask = IRQ_MASK(I2C_CLEAR_ALL_INTS); - writel(mask, priv->virtbase + I2C_ICR); + writel(I2C_CLEAR_ALL_INTS, priv->virtbase + I2C_ICR); } /** @@ -468,7 +462,7 @@ static int read_i2c(struct nmk_i2c_dev *priv, u16 flags) else irq_mask |= I2C_IT_MTDWS; - irq_mask = I2C_CLEAR_ALL_INTS & IRQ_MASK(irq_mask); + irq_mask &= I2C_CLEAR_ALL_INTS; writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, priv->virtbase + I2C_IMSCR); @@ -547,7 +541,7 @@ static int write_i2c(struct nmk_i2c_dev *priv, u16 flags) else irq_mask |= I2C_IT_MTDWS; - irq_mask = I2C_CLEAR_ALL_INTS & IRQ_MASK(irq_mask); + irq_mask &= I2C_CLEAR_ALL_INTS; writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, priv->virtbase + I2C_IMSCR); @@ -703,8 +697,8 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, */ static int disable_interrupts(struct nmk_i2c_dev *priv, u32 irq) { - irq = IRQ_MASK(irq); - writel(readl(priv->virtbase + I2C_IMSCR) & ~(I2C_CLEAR_ALL_INTS & irq), + irq &= I2C_CLEAR_ALL_INTS; + writel(readl(priv->virtbase + I2C_IMSCR) & ~irq, priv->virtbase + I2C_IMSCR); return 0; } From patchwork Thu Feb 15 16:52:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558849 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CF6F7C48BEB for ; Thu, 15 Feb 2024 16:53:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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t=1708015957; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ch8tjKPy7nBDupOpE8cNjrCAOYNZCyjkUOP1wYjWAEI=; b=VVirSm/5GxKXpZJE22DcH0Nr7q0tP0ItL/g2COO4hLKbCUakOI72ciJOJb6n4LTX5WHQEY Y6CCjcskndgXiFrKn8fzmupYoJo4nUTnu6KWCjP6MXaRX3cHj1Zy0my9c1h0LQuhjNbEM5 I6q1o+vrhk1I6vTB41bl46pL0Ha+SEc/iHKBUWdqwNB1fpPRcaE5A7unoIa00lGzTtjrTH LJ/fDgej+wiP09v3pBBDGogbantMurLecZH2xD9Q/eqRfdo5pYkbmWSgBGicYnfiYZoMI4 CWXRJZMHuQk1q1eQi5RNQps1U5Jb2xaQ0x5IWhZmSRc3N1J1/TKrJwRubKWVTA== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:13 +0100 Subject: [PATCH 06/13] i2c: nomadik: use bitops helpers MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-6-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085239_444783_6393E632 X-CRM114-Status: GOOD ( 18.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Constant register bit fields are declared using hardcoded hex values; replace them by calls to BIT() and GENMASK(). Replace custom GEN_MASK() macro by the generic FIELD_PREP(). Replace manual bit manipulations by the generic FIELD_GET() macro. Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 150 ++++++++++++++++++++------------------- 1 file changed, 77 insertions(+), 73 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 80bdf7e42613..aa68ab402b10 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -9,6 +9,7 @@ * Author: Srinidhi Kasagar * Author: Sachin Verma */ +#include #include #include #include @@ -42,54 +43,59 @@ #define I2C_ICR (0x038) /* Control registers */ -#define I2C_CR_PE (0x1 << 0) /* Peripheral Enable */ -#define I2C_CR_OM (0x3 << 1) /* Operating mode */ -#define I2C_CR_SAM (0x1 << 3) /* Slave addressing mode */ -#define I2C_CR_SM (0x3 << 4) /* Speed mode */ -#define I2C_CR_SGCM (0x1 << 6) /* Slave general call mode */ -#define I2C_CR_FTX (0x1 << 7) /* Flush Transmit */ -#define I2C_CR_FRX (0x1 << 8) /* Flush Receive */ -#define I2C_CR_DMA_TX_EN (0x1 << 9) /* DMA Tx enable */ -#define I2C_CR_DMA_RX_EN (0x1 << 10) /* DMA Rx Enable */ -#define I2C_CR_DMA_SLE (0x1 << 11) /* DMA sync. logic enable */ -#define I2C_CR_LM (0x1 << 12) /* Loopback mode */ -#define I2C_CR_FON (0x3 << 13) /* Filtering on */ -#define I2C_CR_FS (0x3 << 15) /* Force stop enable */ +#define I2C_CR_PE BIT(0) /* Peripheral Enable */ +#define I2C_CR_OM GENMASK(2, 1) /* Operating mode */ +#define I2C_CR_SAM BIT(3) /* Slave addressing mode */ +#define I2C_CR_SM GENMASK(5, 4) /* Speed mode */ +#define I2C_CR_SGCM BIT(6) /* Slave general call mode */ +#define I2C_CR_FTX BIT(7) /* Flush Transmit */ +#define I2C_CR_FRX BIT(8) /* Flush Receive */ +#define I2C_CR_DMA_TX_EN BIT(9) /* DMA Tx enable */ +#define I2C_CR_DMA_RX_EN BIT(10) /* DMA Rx Enable */ +#define I2C_CR_DMA_SLE BIT(11) /* DMA sync. logic enable */ +#define I2C_CR_LM BIT(12) /* Loopback mode */ +#define I2C_CR_FON GENMASK(14, 13) /* Filtering on */ +#define I2C_CR_FS GENMASK(16, 15) /* Force stop enable */ + +/* Slave control register (SCR) */ +#define I2C_SCR_SLSU GENMASK(31, 16) /* Slave data setup time */ /* Master controller (MCR) register */ -#define I2C_MCR_OP (0x1 << 0) /* Operation */ -#define I2C_MCR_A7 (0x7f << 1) /* 7-bit address */ -#define I2C_MCR_EA10 (0x7 << 8) /* 10-bit Extended address */ -#define I2C_MCR_SB (0x1 << 11) /* Extended address */ -#define I2C_MCR_AM (0x3 << 12) /* Address type */ -#define I2C_MCR_STOP (0x1 << 14) /* Stop condition */ -#define I2C_MCR_LENGTH (0x7ff << 15) /* Transaction length */ +#define I2C_MCR_OP BIT(0) /* Operation */ +#define I2C_MCR_A7 GENMASK(7, 1) /* 7-bit address */ +#define I2C_MCR_EA10 GENMASK(10, 8) /* 10-bit Extended address */ +#define I2C_MCR_SB BIT(11) /* Extended address */ +#define I2C_MCR_AM GENMASK(13, 12) /* Address type */ +#define I2C_MCR_STOP BIT(14) /* Stop condition */ +#define I2C_MCR_LENGTH GENMASK(25, 15) /* Transaction length */ /* Status register (SR) */ -#define I2C_SR_OP (0x3 << 0) /* Operation */ -#define I2C_SR_STATUS (0x3 << 2) /* controller status */ -#define I2C_SR_CAUSE (0x7 << 4) /* Abort cause */ -#define I2C_SR_TYPE (0x3 << 7) /* Receive type */ -#define I2C_SR_LENGTH (0x7ff << 9) /* Transfer length */ +#define I2C_SR_OP GENMASK(1, 0) /* Operation */ +#define I2C_SR_STATUS GENMASK(3, 2) /* controller status */ +#define I2C_SR_CAUSE GENMASK(6, 4) /* Abort cause */ +#define I2C_SR_TYPE GENMASK(8, 7) /* Receive type */ +#define I2C_SR_LENGTH GENMASK(19, 9) /* Transfer length */ + +/* Baud-rate counter register (BRCR) */ +#define I2C_BRCR_BRCNT1 GENMASK(31, 16) /* Baud-rate counter 1 */ +#define I2C_BRCR_BRCNT2 GENMASK(15, 0) /* Baud-rate counter 2 */ /* Interrupt mask set/clear (IMSCR) bits */ -#define I2C_IT_TXFE (0x1 << 0) -#define I2C_IT_TXFNE (0x1 << 1) -#define I2C_IT_TXFF (0x1 << 2) -#define I2C_IT_TXFOVR (0x1 << 3) -#define I2C_IT_RXFE (0x1 << 4) -#define I2C_IT_RXFNF (0x1 << 5) -#define I2C_IT_RXFF (0x1 << 6) -#define I2C_IT_RFSR (0x1 << 16) -#define I2C_IT_RFSE (0x1 << 17) -#define I2C_IT_WTSR (0x1 << 18) -#define I2C_IT_MTD (0x1 << 19) -#define I2C_IT_STD (0x1 << 20) -#define I2C_IT_MAL (0x1 << 24) -#define I2C_IT_BERR (0x1 << 25) -#define I2C_IT_MTDWS (0x1 << 28) - -#define GEN_MASK(val, mask, sb) (((val) << (sb)) & (mask)) +#define I2C_IT_TXFE BIT(0) +#define I2C_IT_TXFNE BIT(1) +#define I2C_IT_TXFF BIT(2) +#define I2C_IT_TXFOVR BIT(3) +#define I2C_IT_RXFE BIT(4) +#define I2C_IT_RXFNF BIT(5) +#define I2C_IT_RXFF BIT(6) +#define I2C_IT_RFSR BIT(16) +#define I2C_IT_RFSE BIT(17) +#define I2C_IT_WTSR BIT(18) +#define I2C_IT_MTD BIT(19) +#define I2C_IT_STD BIT(20) +#define I2C_IT_MAL BIT(24) +#define I2C_IT_BERR BIT(25) +#define I2C_IT_MTDWS BIT(28) /* some bits in ICR are reserved */ #define I2C_CLEAR_ALL_INTS 0x131f007f @@ -284,7 +290,7 @@ static int init_hw(struct nmk_i2c_dev *priv) } /* enable peripheral, master mode operation */ -#define DEFAULT_I2C_REG_CR ((1 << 1) | I2C_CR_PE) +#define DEFAULT_I2C_REG_CR (FIELD_PREP(I2C_CR_OM, 0b01) | I2C_CR_PE) /** * load_i2c_mcr_reg() - load the MCR register @@ -296,41 +302,42 @@ static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *priv, u16 flags) u32 mcr = 0; unsigned short slave_adr_3msb_bits; - mcr |= GEN_MASK(priv->cli.slave_adr, I2C_MCR_A7, 1); + mcr |= FIELD_PREP(I2C_MCR_A7, priv->cli.slave_adr); if (unlikely(flags & I2C_M_TEN)) { /* 10-bit address transaction */ - mcr |= GEN_MASK(2, I2C_MCR_AM, 12); + mcr |= FIELD_PREP(I2C_MCR_AM, 2); /* * Get the top 3 bits. * EA10 represents extended address in MCR. This includes * the extension (MSB bits) of the 7 bit address loaded * in A7 */ - slave_adr_3msb_bits = (priv->cli.slave_adr >> 7) & 0x7; + slave_adr_3msb_bits = FIELD_GET(GENMASK(9, 7), + priv->cli.slave_adr); - mcr |= GEN_MASK(slave_adr_3msb_bits, I2C_MCR_EA10, 8); + mcr |= FIELD_PREP(I2C_MCR_EA10, slave_adr_3msb_bits); } else { /* 7-bit address transaction */ - mcr |= GEN_MASK(1, I2C_MCR_AM, 12); + mcr |= FIELD_PREP(I2C_MCR_AM, 1); } /* start byte procedure not applied */ - mcr |= GEN_MASK(0, I2C_MCR_SB, 11); + mcr |= FIELD_PREP(I2C_MCR_SB, 0); /* check the operation, master read/write? */ if (priv->cli.operation == I2C_WRITE) - mcr |= GEN_MASK(I2C_WRITE, I2C_MCR_OP, 0); + mcr |= FIELD_PREP(I2C_MCR_OP, I2C_WRITE); else - mcr |= GEN_MASK(I2C_READ, I2C_MCR_OP, 0); + mcr |= FIELD_PREP(I2C_MCR_OP, I2C_READ); /* stop or repeated start? */ if (priv->stop) - mcr |= GEN_MASK(1, I2C_MCR_STOP, 14); + mcr |= FIELD_PREP(I2C_MCR_STOP, 1); else - mcr &= ~(GEN_MASK(1, I2C_MCR_STOP, 14)); + mcr &= ~FIELD_PREP(I2C_MCR_STOP, 1); - mcr |= GEN_MASK(priv->cli.count, I2C_MCR_LENGTH, 15); + mcr |= FIELD_PREP(I2C_MCR_LENGTH, priv->cli.count); return mcr; } @@ -383,7 +390,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *priv) slsu += 1; dev_dbg(&priv->adev->dev, "calculated SLSU = %04x\n", slsu); - writel(slsu << 16, priv->virtbase + I2C_SCR); + writel(FIELD_PREP(I2C_SCR_SLSU, slsu), priv->virtbase + I2C_SCR); /* * The spec says, in case of std. mode the divider is @@ -399,8 +406,8 @@ static void setup_i2c_controller(struct nmk_i2c_dev *priv) * plus operation. Currently we do not supprt high speed mode * so set brcr1 to 0. */ - brcr1 = 0 << 16; - brcr2 = (i2c_clk / (priv->clk_freq * div)) & 0xffff; + brcr1 = FIELD_PREP(I2C_BRCR_BRCNT1, 0); + brcr2 = FIELD_PREP(I2C_BRCR_BRCNT2, i2c_clk / (priv->clk_freq * div)); /* set the baud rate counter register */ writel((brcr1 | brcr2), priv->virtbase + I2C_BRCR); @@ -414,12 +421,13 @@ static void setup_i2c_controller(struct nmk_i2c_dev *priv) if (priv->sm > I2C_FREQ_MODE_FAST) { dev_err(&priv->adev->dev, "do not support this mode defaulting to std. mode\n"); - brcr2 = i2c_clk / (I2C_MAX_STANDARD_MODE_FREQ * 2) & 0xffff; + brcr2 = FIELD_PREP(I2C_BRCR_BRCNT2, + i2c_clk / (I2C_MAX_STANDARD_MODE_FREQ * 2)); writel((brcr1 | brcr2), priv->virtbase + I2C_BRCR); - writel(I2C_FREQ_MODE_STANDARD << 4, - priv->virtbase + I2C_CR); + writel(FIELD_PREP(I2C_CR_SM, I2C_FREQ_MODE_STANDARD), + priv->virtbase + I2C_CR); } - writel(priv->sm << 4, priv->virtbase + I2C_CR); + writel(FIELD_PREP(I2C_CR_SM, priv->sm), priv->virtbase + I2C_CR); /* set the Tx and Rx FIFO threshold */ writel(priv->tft, priv->virtbase + I2C_TFTR); @@ -583,13 +591,8 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *priv, u16 flags) u32 cause; i2c_sr = readl(priv->virtbase + I2C_SR); - /* - * Check if the controller I2C operation status - * is set to ABORT(11b). - */ - if (((i2c_sr >> 2) & 0x3) == 0x3) { - /* get the abort cause */ - cause = (i2c_sr >> 4) & 0x7; + if (FIELD_GET(I2C_SR_STATUS, i2c_sr) == I2C_ABORT) { + cause = FIELD_GET(I2C_SR_CAUSE, i2c_sr); dev_err(&priv->adev->dev, "%s\n", cause >= ARRAY_SIZE(abort_causes) ? "unknown reason" : @@ -730,7 +733,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) misr = readl(priv->virtbase + I2C_MISR); src = __ffs(misr); - switch ((1 << src)) { + switch (BIT(src)) { /* Transmit FIFO nearly empty interrupt */ case I2C_IT_TXFNE: @@ -824,15 +827,16 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) * during the transaction. */ case I2C_IT_BERR: + { + u32 sr = readl(priv->virtbase + I2C_SR); priv->result = -EIO; - /* get the status */ - if (((readl(priv->virtbase + I2C_SR) >> 2) & 0x3) == I2C_ABORT) + if (FIELD_GET(I2C_SR_STATUS, sr) == I2C_ABORT) init_hw(priv); i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_BERR); complete(&priv->xfer_complete); - - break; + } + break; /* * Tx FIFO overrun interrupt. From patchwork Thu Feb 15 16:52:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558850 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 45460C4829E for ; Thu, 15 Feb 2024 16:53:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fgq4eOV+MXbxJ+95HGGdZFEPifrLYmbZwzn8k4s4n1Y=; b=k2OiShgh9nLgA8 P/IDhBPHXfuBibhvsj8AVjugK5fAfNRUX8P4CeoPx7UhUsOXzq83m6uQJ6xIiEdFDahs0X4jms6qh Hy8tNVE1mUEUT/3WMWNjnW2sTOJdOkKA8KUQcHZ1BRrabj6XMEK8khKr4rVg8CiD+dWCMJBDJnfaG 1kDh/M4s9KBtlm2dVyAuMe4mtF69Viz+4sNf+lG8OeK25bCgVF/2KURAcypCLQVi9vXFTmYS3oeh8 fgx35P6M45YlIFV+B07Z9r/claGA/KeINw9Kei4NXhsZQ3nJyOwD7zr60TX0G8Y8YukxWRgHlwnAh vJ2k3XcVbeRmxIFxGVnw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyq-0000000H3Ug-0YAf; Thu, 15 Feb 2024 16:53:00 +0000 Received: from relay4-d.mail.gandi.net ([217.70.183.196]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyV-0000000H3Gc-2rlF for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:45 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id A8CCDE0022; Thu, 15 Feb 2024 16:52:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015958; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6nKfxjjL9YJKMVRbZ9zGHy5EtFlaaVeaCPp72QOiJ54=; b=CTzkAeoFsqhnE2t41G4MU1FRxz/HQTMRdeIrSrPJhfiG3UcATEK9QuOADFWVMGcp42xO6f WFqCh2y/FWJmwopMpMnLU1Ao6zIBLB+SaGpBLHt+TjnGEjDhgWAh4bZRPjlb6GmGQjqJtg jAK9lQEcnliuJKMAv7/BXefpTwjIqpq6oaY7vwUfDEvb8W4G6y8su2hM5Ox6QL5RSIYUFJ ohzrJzPpDRqK40pAulCl1ytBhhG8LjoCombqJtUxuxMLRW1VR8vdU5kuo/XJcl+wjAqK+Z b32OADQNxnNWfFbf5N5yKLICuWyvK66UPUlQVgzMkaqzAfWMYmsAK+ybICjPyQ== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:14 +0100 Subject: [PATCH 07/13] i2c: nomadik: support short xfer timeouts using waitqueue & hrtimer MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-7-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085240_062086_1CB6A64A X-CRM114-Status: GOOD ( 18.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Replace the completion by a waitqueue for synchronization from IRQ handler to task. For short timeouts, use hrtimers, else use timers. Usecase: avoid blocking the I2C bus for too long when an issue occurs. The threshold picked is one jiffy: if timeout is below that, use hrtimers. This threshold is NOT configurable. Implement behavior but do NOT change fetching of timeout. This means the timeout is unchanged (200ms) and the hrtimer case will never trigger. A waitqueue is used because it supports both desired timeout approaches. See wait_event_timeout() and wait_event_hrtimeout(). An atomic boolean serves as synchronization condition. Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 70 +++++++++++++++++++++++++++------------- 1 file changed, 48 insertions(+), 22 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index aa68ab402b10..e68b8e0d7919 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -162,10 +162,11 @@ struct i2c_nmk_client { * @clk_freq: clock frequency for the operation mode * @tft: Tx FIFO Threshold in bytes * @rft: Rx FIFO Threshold in bytes - * @timeout: Slave response timeout (ms) + * @timeout_usecs: Slave response timeout * @sm: speed mode * @stop: stop condition. - * @xfer_complete: acknowledge completion for a I2C message. + * @xfer_wq: xfer done wait queue. + * @xfer_done: xfer done boolean. * @result: controller propogated result. */ struct nmk_i2c_dev { @@ -179,10 +180,11 @@ struct nmk_i2c_dev { u32 clk_freq; unsigned char tft; unsigned char rft; - int timeout; + int timeout_usecs; enum i2c_freq_mode sm; int stop; - struct completion xfer_complete; + struct wait_queue_head xfer_wq; + bool xfer_done; int result; }; @@ -434,6 +436,22 @@ static void setup_i2c_controller(struct nmk_i2c_dev *priv) writel(priv->rft, priv->virtbase + I2C_RFTR); } +static bool nmk_i2c_wait_xfer_done(struct nmk_i2c_dev *priv) +{ + if (priv->timeout_usecs < jiffies_to_usecs(1)) { + unsigned long timeout_usecs = priv->timeout_usecs; + ktime_t timeout = ktime_set(0, timeout_usecs * NSEC_PER_USEC); + + wait_event_hrtimeout(priv->xfer_wq, priv->xfer_done, timeout); + } else { + unsigned long timeout = usecs_to_jiffies(priv->timeout_usecs); + + wait_event_timeout(priv->xfer_wq, priv->xfer_done, timeout); + } + + return priv->xfer_done; +} + /** * read_i2c() - Read from I2C client device * @priv: private data of I2C Driver @@ -445,9 +463,9 @@ static void setup_i2c_controller(struct nmk_i2c_dev *priv) */ static int read_i2c(struct nmk_i2c_dev *priv, u16 flags) { - int status = 0; u32 mcr, irq_mask; - unsigned long timeout; + int status = 0; + bool xfer_done; mcr = load_i2c_mcr_reg(priv, flags); writel(mcr, priv->virtbase + I2C_MCR); @@ -459,7 +477,8 @@ static int read_i2c(struct nmk_i2c_dev *priv, u16 flags) /* enable the controller */ i2c_set_bit(priv->virtbase + I2C_CR, I2C_CR_PE); - init_completion(&priv->xfer_complete); + init_waitqueue_head(&priv->xfer_wq); + priv->xfer_done = false; /* enable interrupts by setting the mask */ irq_mask = (I2C_IT_RXFNF | I2C_IT_RXFF | @@ -475,10 +494,9 @@ static int read_i2c(struct nmk_i2c_dev *priv, u16 flags) writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, priv->virtbase + I2C_IMSCR); - timeout = wait_for_completion_timeout( - &priv->xfer_complete, priv->adap.timeout); + xfer_done = nmk_i2c_wait_xfer_done(priv); - if (timeout == 0) { + if (!xfer_done) { /* Controller timed out */ dev_err(&priv->adev->dev, "read from slave 0x%x timed out\n", priv->cli.slave_adr); @@ -513,9 +531,9 @@ static void fill_tx_fifo(struct nmk_i2c_dev *priv, int no_bytes) */ static int write_i2c(struct nmk_i2c_dev *priv, u16 flags) { - u32 status = 0; u32 mcr, irq_mask; - unsigned long timeout; + u32 status = 0; + bool xfer_done; mcr = load_i2c_mcr_reg(priv, flags); @@ -528,7 +546,8 @@ static int write_i2c(struct nmk_i2c_dev *priv, u16 flags) /* enable the controller */ i2c_set_bit(priv->virtbase + I2C_CR, I2C_CR_PE); - init_completion(&priv->xfer_complete); + init_waitqueue_head(&priv->xfer_wq); + priv->xfer_done = false; /* enable interrupts by settings the masks */ irq_mask = (I2C_IT_TXFOVR | I2C_IT_MAL | I2C_IT_BERR); @@ -554,10 +573,9 @@ static int write_i2c(struct nmk_i2c_dev *priv, u16 flags) writel(readl(priv->virtbase + I2C_IMSCR) | irq_mask, priv->virtbase + I2C_IMSCR); - timeout = wait_for_completion_timeout( - &priv->xfer_complete, priv->adap.timeout); + xfer_done = nmk_i2c_wait_xfer_done(priv); - if (timeout == 0) { + if (!xfer_done) { /* Controller timed out */ dev_err(&priv->adev->dev, "write to slave 0x%x timed out\n", priv->cli.slave_adr); @@ -807,7 +825,9 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) priv->cli.count); init_hw(priv); } - complete(&priv->xfer_complete); + priv->xfer_done = true; + wake_up(&priv->xfer_wq); + break; @@ -817,7 +837,9 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) init_hw(priv); i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_MAL); - complete(&priv->xfer_complete); + priv->xfer_done = true; + wake_up(&priv->xfer_wq); + break; @@ -834,7 +856,9 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) init_hw(priv); i2c_set_bit(priv->virtbase + I2C_ICR, I2C_IT_BERR); - complete(&priv->xfer_complete); + priv->xfer_done = true; + wake_up(&priv->xfer_wq); + } break; @@ -848,7 +872,9 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) init_hw(priv); dev_err(dev, "Tx Fifo Over run\n"); - complete(&priv->xfer_complete); + priv->xfer_done = true; + wake_up(&priv->xfer_wq); + break; @@ -949,7 +975,7 @@ static void nmk_i2c_of_probe(struct device_node *np, priv->sm = I2C_FREQ_MODE_FAST; priv->tft = 1; /* Tx FIFO threshold */ priv->rft = 8; /* Rx FIFO threshold */ - priv->timeout = 200; /* Slave response timeout(ms) */ + priv->timeout_usecs = 200 * USEC_PER_MSEC; /* Slave response timeout */ } static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) @@ -1009,7 +1035,7 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) adap->owner = THIS_MODULE; adap->class = I2C_CLASS_DEPRECATED; adap->algo = &nmk_i2c_algo; - adap->timeout = msecs_to_jiffies(priv->timeout); + adap->timeout = usecs_to_jiffies(priv->timeout_usecs); snprintf(adap->name, sizeof(adap->name), "Nomadik I2C at %pR", &adev->res); From patchwork Thu Feb 15 16:52:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558852 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9A5E6C48BC4 for ; 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Thu, 15 Feb 2024 16:54:10 +0000 Received: from relay4-d.mail.gandi.net ([2001:4b98:dc4:8::224]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyW-0000000H3H2-1pgt for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:46 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 5E7D8E001B; Thu, 15 Feb 2024 16:52:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5W2sSL7KXTa75TLd1u49SS6u6N4gKtVqD7M4RKYa2bU=; b=dIxHuc+q76e9Fo3tmpFDzwS3cGp4P0feO83Vi9KUPUUJCSaPlNMCIY0cNUIxKQr0bIc1Sn bXtUYDJs4Y+ZW9cILDmc4atXws9VkQ82t2IxUVlbTKGbdUXLmqZ9M96uzRZk753owpssG6 kAqWRvnh7b9Atpw6YwozbTkGZ3T5i9QZ3QriHJ19lIElgeJwdsey20ZbOp3q4FTsXwpXUB YiJ1gUavaooMS4VFu7kVZAfrPyAB5PDK+pcKQmVsFrUoYeyPlZpcfH+/aWhOUwJOn3eLwW ZeZVhbkdNQr2PLYoWVTJjMIVw0A5yDRWukutqJHs+QbSWnSRZBmlsOT7eVQICw== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:15 +0100 Subject: [PATCH 08/13] i2c: nomadik: replace jiffies by ktime for FIFO flushing timeout MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-8-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085240_703184_66747968 X-CRM114-Status: GOOD ( 12.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The FIFO flush function uses a jiffies amount to detect timeouts as the flushing is async. Replace with ktime to get more accurate precision and support short timeouts. Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index e68b8e0d7919..afd54999bbbb 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -219,8 +219,8 @@ static inline void i2c_clr_bit(void __iomem *reg, u32 mask) static int flush_i2c_fifo(struct nmk_i2c_dev *priv) { #define LOOP_ATTEMPTS 10 + ktime_t timeout; int i; - unsigned long timeout; /* * flush the transmit and receive FIFO. The flushing @@ -232,9 +232,9 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *priv) writel((I2C_CR_FTX | I2C_CR_FRX), priv->virtbase + I2C_CR); for (i = 0; i < LOOP_ATTEMPTS; i++) { - timeout = jiffies + priv->adap.timeout; + timeout = ktime_add_us(ktime_get(), priv->timeout_usecs); - while (!time_after(jiffies, timeout)) { + while (ktime_after(timeout, ktime_get())) { if ((readl(priv->virtbase + I2C_CR) & (I2C_CR_FTX | I2C_CR_FRX)) == 0) return 0; From patchwork Thu Feb 15 16:52:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558851 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36B70C4829E for ; Thu, 15 Feb 2024 16:54:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vkKQYXFs+Ei7sLfo71azJ5hyOvy7K/WaFqbV1ncywII=; b=tYJdJgbNdLjM4u 6MPjg26+nYLYeRzOnHLcbuc4v9WcImrI9tU0XZ8/XGh/gameH89HfMv5R6NCrm9XWV93S/aZfeu4l ij8zjGeG26a/F4i/M3TdhWZC4FXqqnmv+eMk7Aa0j6p0iC4+7Iw4Siu+6XGE6euzaKHDhzm4dtn0B POs0PG9cQYgosl6RL0fdGLD7vDygn1VBxhLhREamowmq+cqNmv88IkA3D022TMTuDHh4lAVJRJaTu CiaTO2X3yspovCNgVywOEbmRSN+HlYMR9pONUQTIAeZ6ogVLxxWx2u0Vd6mf2WnfaJNqn6mlPBiYV fwVl27Foy2BuXMOhzkOQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raf00-0000000H49p-0Sf2; Thu, 15 Feb 2024 16:54:12 +0000 Received: from relay4-d.mail.gandi.net ([2001:4b98:dc4:8::224]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeyX-0000000H3He-0asK for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:47 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 15314E001C; Thu, 15 Feb 2024 16:52:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UI781RDrcik2RYtu08sBCE4vst1s92iXfDeWJ+Uj5KU=; b=X05Jz2dAVG/OH6mW1jIs5toXJymKoVNLKETT2ySNywm1E39ztnrDGFF0D8gM52fJK4ht8S GlsXS6EtRyAI8NqrY7PgfJyUBMVvBViA4JsdVZMN8W4ulmO2shWGGWJTXehc4x2dooC8NX RyILp5eN8NororpKPh7LTYt/9AsFMA78CfPfFEPhOA7YEiS4k1UBJrjJ2FYQJALUz5OCTO 106oqSyERyYZ3k+PHU2UTSe1t9JkdECSBZzOQtF/UYVaoB/j9Zsd90zu1q6phsU06un7z8 jWPCIyvX5HbtAgH44bQ3QaTbUckQBQRXspjG5PwyVBOkvn2LeXW5npVDH7SNYg== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:16 +0100 Subject: [PATCH 09/13] i2c: nomadik: fetch timeout-usecs property from devicetree MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-9-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085241_413774_61FF3E13 X-CRM114-Status: GOOD ( 11.59 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Allow overriding the default timeout value (200ms) from devicetree, using the timeout-usecs property. The i2c_adapter->timeout field is an unaccurate jiffies amount; i2c-nomadik uses hrtimers for timeouts below one jiffy. Signed-off-by: Théo Lebrun Reviewed-by: Linus Walleij --- drivers/i2c/busses/i2c-nomadik.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index afd54999bbbb..23e12c570457 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -964,6 +964,8 @@ static const struct i2c_algorithm nmk_i2c_algo = { static void nmk_i2c_of_probe(struct device_node *np, struct nmk_i2c_dev *priv) { + u32 timeout_usecs; + /* Default to 100 kHz if no frequency is given in the node */ if (of_property_read_u32(np, "clock-frequency", &priv->clk_freq)) priv->clk_freq = I2C_MAX_STANDARD_MODE_FREQ; @@ -975,7 +977,12 @@ static void nmk_i2c_of_probe(struct device_node *np, priv->sm = I2C_FREQ_MODE_FAST; priv->tft = 1; /* Tx FIFO threshold */ priv->rft = 8; /* Rx FIFO threshold */ - priv->timeout_usecs = 200 * USEC_PER_MSEC; /* Slave response timeout */ + + /* Slave response timeout */ + if (!of_property_read_u32(np, "timeout-usecs", &timeout_usecs)) + priv->timeout_usecs = timeout_usecs; + else + priv->timeout_usecs = 200 * USEC_PER_MSEC; } static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) From patchwork Thu Feb 15 16:52:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558860 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36652C4829E for ; Thu, 15 Feb 2024 16:54:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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s=gm1; t=1708015960; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ksC5z+uQT8JX7fjtCfLqhFUJQnwzz+zL0ZliTFb1W/U=; b=lBMzkyOpDFvlhrVZrgierYbgIjaKk8uYd4Mg6POWHhf/fvmgCtVRID1T9hvMb8s+IAHMmY xDAgXA/XlkTZBq4VP1D5awK7LcvdC74dpMM5d+Bc2udUBfbHgXecGw3n0MPBaMWfQ7Mmbu NQvVrWFckor5TXHzty4x2nQOI4RKQ0umi1KuE2MF/xA+Qo/oXbEvxoC2RvpLjFOHpGZ+8e +UrKiwSg46JtzA7H8LsgtYqpGRdSCRjM2gpz+jcKEzZjzLBQth4DuO/5U4kTUIXVfdXv1C 123wEjBROkK8w7ya6cAIHPD14OqCB1lqq6+nQYyYCb/pc4QwHYoh62wKaXKr3g== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:17 +0100 Subject: [PATCH 10/13] i2c: nomadik: support Mobileye EyeQ5 I2C controller MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-10-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085245_483638_4A163EC8 X-CRM114-Status: GOOD ( 19.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add compatible for the integration of the same DB8500 IP block into the Mobileye EyeQ5 platform. Two quirks are present: - The memory bus only supports 32-bit accesses. One writeb() is done to fill the Tx FIFO which we replace with a writel(). - A register must be configured for the I2C speed mode; it is located in a shared register region called OLB. We access that memory region using a syscon & regmap that gets passed as a phandle (mobileye,olb). A two-bit enum per controller is written into the register; that requires us to know the global index of the I2C controller (mobileye,id). We add #include and and sort headers. Signed-off-by: Théo Lebrun --- drivers/i2c/busses/i2c-nomadik.c | 79 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 71 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 23e12c570457..eb076419dfa8 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -6,22 +6,30 @@ * I2C master mode controller driver, used in Nomadik 8815 * and Ux500 platforms. * + * The Mobileye EyeQ5 platform is also supported; it uses + * the same Ux500/DB8500 IP block with two quirks: + * - The memory bus only supports 32-bit accesses. + * - A register must be configured for the I2C speed mode; + * it is located in a shared register region called OLB. + * * Author: Srinidhi Kasagar * Author: Sachin Verma */ +#include #include +#include +#include +#include #include -#include -#include -#include #include -#include -#include -#include #include -#include +#include +#include #include #include +#include +#include +#include #define DRIVER_NAME "nmk-i2c" @@ -110,6 +118,10 @@ enum i2c_freq_mode { I2C_FREQ_MODE_FAST_PLUS, /* up to 1 Mb/s */ }; +/* Mobileye EyeQ5 offset into a shared register region (called OLB) */ +#define NMK_I2C_EYEQ5_OLB_IOCR2 0x0B8 +#define NMK_I2C_EYEQ5_OLB_IOCR2_SHIFT(id) (4 + 2 * (id)) + /** * struct i2c_vendor_data - per-vendor variations * @has_mtdws: variant has the MTDWS bit @@ -168,6 +180,7 @@ struct i2c_nmk_client { * @xfer_wq: xfer done wait queue. * @xfer_done: xfer done boolean. * @result: controller propogated result. + * @has_32b_bus: controller is on a bus that only supports 32-bit accesses. */ struct nmk_i2c_dev { struct i2c_vendor_data *vendor; @@ -186,6 +199,7 @@ struct nmk_i2c_dev { struct wait_queue_head xfer_wq; bool xfer_done; int result; + bool has_32b_bus; }; /* controller's abort causes */ @@ -514,7 +528,10 @@ static void fill_tx_fifo(struct nmk_i2c_dev *priv, int no_bytes) (priv->cli.count != 0); count--) { /* write to the Tx FIFO */ - writeb(*priv->cli.buffer, priv->virtbase + I2C_TFR); + if (priv->has_32b_bus) + writel(*priv->cli.buffer, priv->virtbase + I2C_TFR); + else + writeb(*priv->cli.buffer, priv->virtbase + I2C_TFR); priv->cli.buffer++; priv->cli.count--; priv->cli.xfer_bytes++; @@ -985,6 +1002,43 @@ static void nmk_i2c_of_probe(struct device_node *np, priv->timeout_usecs = 200 * USEC_PER_MSEC; } +static int nmk_i2c_eyeq5_probe(struct nmk_i2c_dev *priv) +{ + struct device *dev = &priv->adev->dev; + struct device_node *np = dev->of_node; + unsigned int shift, speed_mode; + struct regmap *olb; + int ret; + u32 id; + + priv->has_32b_bus = true; + + olb = syscon_regmap_lookup_by_phandle(np, "mobileye,olb"); + if (IS_ERR_OR_NULL(olb)) { + if (!olb) + olb = ERR_PTR(-ENOENT); + return dev_err_probe(dev, PTR_ERR(olb), + "failed OLB lookup: %lu\n", PTR_ERR(olb)); + } + + ret = of_property_read_u32(np, "mobileye,id", &id); + if (ret) + return dev_err_probe(dev, ret, "failed ID lookup: %d\n", ret); + + if (priv->clk_freq <= 400000) + speed_mode = 0b00; + else if (priv->clk_freq <= 1000000) + speed_mode = 0b01; + else + speed_mode = 0b10; + + shift = NMK_I2C_EYEQ5_OLB_IOCR2_SHIFT(id); + regmap_update_bits(olb, NMK_I2C_EYEQ5_OLB_IOCR2, + 0b11 << shift, speed_mode << shift); + + return 0; +} + static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) { int ret = 0; @@ -1001,8 +1055,17 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) priv->vendor = vendor; priv->adev = adev; + priv->has_32b_bus = false; nmk_i2c_of_probe(np, priv); + if (of_device_is_compatible(np, "mobileye,eyeq5-i2c")) { + ret = nmk_i2c_eyeq5_probe(priv); + if (ret) { + dev_info(dev, "%s: %d: %d\n", __func__, __LINE__, ret); + return ret; + } + } + if (priv->tft > max_fifo_threshold) { dev_warn(dev, "requested TX FIFO threshold %u, adjusted down to %u\n", priv->tft, max_fifo_threshold); From patchwork Thu Feb 15 16:52:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558854 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 20FC1C4829E for ; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add the SoC I2C controller nodes to the platform devicetree. Use a default bus frequency of 400kHz. They are AMBA devices that are matched on PeriphID. Signed-off-by: Théo Lebrun --- arch/mips/boot/dts/mobileye/eyeq5.dtsi | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/arch/mips/boot/dts/mobileye/eyeq5.dtsi b/arch/mips/boot/dts/mobileye/eyeq5.dtsi index 8d4f65ec912d..d27e164f0fc1 100644 --- a/arch/mips/boot/dts/mobileye/eyeq5.dtsi +++ b/arch/mips/boot/dts/mobileye/eyeq5.dtsi @@ -70,6 +70,76 @@ soc: soc { ranges; compatible = "simple-bus"; + i2c0: i2c@300000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0 0x300000 0x0 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; /* Fast mode */ + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <0>; + }; + + i2c1: i2c@400000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0 0x400000 0x0 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; /* Fast mode */ + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <1>; + }; + + i2c2: i2c@500000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0 0x500000 0x0 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; /* Fast mode */ + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <2>; + }; + + i2c3: i2c@600000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0 0x600000 0x0 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; /* Fast mode */ + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <3>; + }; + + i2c4: i2c@700000 { + compatible = "mobileye,eyeq5-i2c", "arm,primecell"; + reg = <0 0x700000 0x0 0x1000>; + interrupt-parent = <&gic>; + interrupts = ; + clock-frequency = <400000>; /* Fast mode */ + #address-cells = <1>; + #size-cells = <0>; + clocks = <&i2c_ser_clk>, <&i2c_clk>; + clock-names = "i2cclk", "apb_pclk"; + mobileye,olb = <&olb>; + mobileye,id = <4>; + }; + uart0: serial@800000 { compatible = "arm,pl011", "arm,primecell"; reg = <0 0x800000 0x0 0x1000>; From patchwork Thu Feb 15 16:52:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558858 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 77CB6C48BEB for ; Thu, 15 Feb 2024 16:54:32 +0000 (UTC) DKIM-Signature: v=1; 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Thu, 15 Feb 2024 16:52:50 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 3CAF9E0020; Thu, 15 Feb 2024 16:52:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015961; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6EzCLVk/9qpcEHez24XKqzeEBqgcss734Jz91cHBP7g=; b=can24PunAbjJTbGFoYLmVdqCnXGgNiAwPtcZUrAzh1Y3LKP+m3LZvo4xhqWzZ5LPK7Adby D5A/WOy3ww4cYGrTPo4D/BRsB238CL2q4OWmiupaCG5iS3If7gqJyP+iQYBFIvUdM2H74r 3z/3hgtDz044Y+QddlXY24oHTrjmA6nSWHSwEhk7mR85CnMzHexVVtu3U78gNEg8Csl+VS 8AWrd305imJeFve2cl5/k+4C38aTvUM31RKIlE8g2mqpGqGngtpAaMk/T+RW+wC41yaLkh DJcysU3KAQVJJbwAg4hWdQZDYotL/4P2GjrY2/KmOKzVhumRFruQLGNxNnRxKw== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:19 +0100 Subject: [PATCH 12/13] MIPS: mobileye: eyeq5: add evaluation board I2C temp sensor MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-12-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085245_491223_19DB4C9D X-CRM114-Status: UNSURE ( 7.48 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Declare the temperature sensor on I2C bus 2. Its label is the schematics identifier. Signed-off-by: Théo Lebrun --- arch/mips/boot/dts/mobileye/eyeq5-epm5.dts | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/mips/boot/dts/mobileye/eyeq5-epm5.dts b/arch/mips/boot/dts/mobileye/eyeq5-epm5.dts index 6898b2d8267d..1f8549acd40d 100644 --- a/arch/mips/boot/dts/mobileye/eyeq5-epm5.dts +++ b/arch/mips/boot/dts/mobileye/eyeq5-epm5.dts @@ -21,3 +21,11 @@ memory@0 { <0x8 0x02000000 0x0 0x7E000000>; }; }; + +&i2c2 { + tmp112@48 { + compatible = "ti,tmp112"; + reg = <0x48>; + label = "U60"; + }; +}; From patchwork Thu Feb 15 16:52:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 13558853 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D7644C48BC4 for ; Thu, 15 Feb 2024 16:54:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=DZeTN4QFiPcx3p53Adiu/QeoaivKU1fMs+jNYO0HmOs=; b=mVbfQp2rlp7wjo n9oaA0juzZlRU2UC9hBbmCJLyFXA2NgFTJFkj/VwUCs5X+kTrEK0JluRoXDSvBGzP1IBcqDXJOz// JVni7RBGIuU2Dm4UTJOwEEgVTmDCHTazVew1H7sIEAQjm00LJNy8mg7qUm1xRYKHDWWreP4DnOl7h Kbu6w4UBkl4A6jdadfnQX4g4+t85Bc23xOzXW7ioOm/bkhRpuZIgDe+iBuEOY2/4fF7YiKI9IAtpE 1PV+EieXENRYi+PV92bkkeUZSA1FBRnh1OjtKwivmb8tscWO5/2KXgMtxLMonIvK+vBdwwL6dVlVr aD7pGai+j8UHHvdlkbxw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raf03-0000000H4BD-0Unw; Thu, 15 Feb 2024 16:54:15 +0000 Received: from relay4-d.mail.gandi.net ([2001:4b98:dc4:8::224]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raeya-0000000H3JA-2gJO for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2024 16:52:49 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id EA1E9E0015; Thu, 15 Feb 2024 16:52:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708015962; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=GiFCwkZp1j+zGkHFn7RNrGArILflr3YrUZ1AXzVuNHk=; b=Puy0rwxWjmDTOBKb2sbGV5fyIc7/74RRKyfDEgEOtMZjdNSJQ2WyY1gl1DXzAwex5mPdl3 QacCUNY23/JCxMcdT2UXKpoTV4B8dO9OsLu+CnNdAiOvBF8bqodVIf9f+1wIvDh+oZr/Lb 3PVbqKj8FyTFPRN0sQW1MqBc443CBD8wy3gnce+N+g7kWWOvnUS5KVIUG+Cvmt7Dpp5Amk pOlISBbrivjhkjen8z7ieN07ncee27jTekI5xQSkYvkQlFXtF30ObTZnKhnqS/HlJ0UL2D tYa1JOjSwvUj2FaPQKG0S2AMA1PSTK5JPxcI/BjXz7G1oyYuTy0sF+km1tvdwA== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Thu, 15 Feb 2024 17:52:20 +0100 Subject: [PATCH 13/13] MIPS: mobileye: eyeq5: add resets to I2C controllers MIME-Version: 1.0 Message-Id: <20240215-mbly-i2c-v1-13-19a336e91dca@bootlin.com> References: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> In-Reply-To: <20240215-mbly-i2c-v1-0-19a336e91dca@bootlin.com> To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Gregory Clement , Vladimir Kondratiev , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.12.4 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240215_085245_455415_33CB332F X-CRM114-Status: UNSURE ( 8.51 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add resets properties to each I2C controller. This depends on the reset-eyeq5 platform reset controller driver. Signed-off-by: Théo Lebrun --- arch/mips/boot/dts/mobileye/eyeq5.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/mips/boot/dts/mobileye/eyeq5.dtsi b/arch/mips/boot/dts/mobileye/eyeq5.dtsi index d27e164f0fc1..c0842836fcc8 100644 --- a/arch/mips/boot/dts/mobileye/eyeq5.dtsi +++ b/arch/mips/boot/dts/mobileye/eyeq5.dtsi @@ -80,6 +80,7 @@ i2c0: i2c@300000 { #size-cells = <0>; clocks = <&i2c_ser_clk>, <&i2c_clk>; clock-names = "i2cclk", "apb_pclk"; + resets = <&reset 0 13>; mobileye,olb = <&olb>; mobileye,id = <0>; }; @@ -94,6 +95,7 @@ i2c1: i2c@400000 { #size-cells = <0>; clocks = <&i2c_ser_clk>, <&i2c_clk>; clock-names = "i2cclk", "apb_pclk"; + resets = <&reset 0 14>; mobileye,olb = <&olb>; mobileye,id = <1>; }; @@ -108,6 +110,7 @@ i2c2: i2c@500000 { #size-cells = <0>; clocks = <&i2c_ser_clk>, <&i2c_clk>; clock-names = "i2cclk", "apb_pclk"; + resets = <&reset 0 15>; mobileye,olb = <&olb>; mobileye,id = <2>; }; @@ -122,6 +125,7 @@ i2c3: i2c@600000 { #size-cells = <0>; clocks = <&i2c_ser_clk>, <&i2c_clk>; clock-names = "i2cclk", "apb_pclk"; + resets = <&reset 0 16>; mobileye,olb = <&olb>; mobileye,id = <3>; }; @@ -136,6 +140,7 @@ i2c4: i2c@700000 { #size-cells = <0>; clocks = <&i2c_ser_clk>, <&i2c_clk>; clock-names = "i2cclk", "apb_pclk"; + resets = <&reset 0 17>; mobileye,olb = <&olb>; mobileye,id = <4>; };