From patchwork Tue Jul 5 06:57:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kavyasree Kotagiri X-Patchwork-Id: 12905976 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 5EBE3C433EF for ; Tue, 5 Jul 2022 06:59:48 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hNiCFJlv1Vm3tlcAWLe2jnjGc72/60FXcj37f+54T80=; b=p5VDRaSiaSReQn xucVw2bK9QRNAvV6PYfjMYcABRHhTPpYZYIt8jQ/4RQ8ioGHYcwF93akIsUFIEq3tBDn801Y5TKlv Dy2n7Ci1K6HQSahLqFroFYb6r1kVr0lkeTYeUTwWz0iVFPxz25AXf3pbxzAcLnxCm6Nnvvwth4s8P 5IVSR/YrgzB4QOUxEkC9IHqUmxoGJ0N7/NojvnCCdmUKA9oPi0onKlehJ5R4GpD5pb3ZK4KxCIDQ/ rblsBeqyZPbRVUDd5KldXq7nPcxnbkz9++mZFWpWRTNLRzOvg2/HEckBoRIS1tRK3xtLsgZHlL+iQ NcqXm3mi8zbK1WTjU7eA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cWC-00FHJN-UL; Tue, 05 Jul 2022 06:58:45 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cVh-00FGrP-Cy for linux-arm-kernel@lists.infradead.org; Tue, 05 Jul 2022 06:58:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1657004293; x=1688540293; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IlX1k+fQ7T1gtJT8ZLsOfP5MxgQz5XU+EtPcgZgS3/I=; b=kW5W1ciYOZsOvoFzamw55+uJ8wOOecW0YFnfyHyOsK4dYGzIiONn2v2A 75Z9D973nOerW7NYxvxiWCXtsKydr5WLCaUkJGkOAIzAmFID/LR3oLjw7 UvxWTgW8PShwPoGSsIjrdDWXoYTH78BQZPSx20v/wJ22ACZsZw2B+ut/t UPAc4vjLDJAMucjpC0TJoH1P9c2qehuNHBxwT57RhAkArgm2lD4f50Urh nx0tbdLwdXg58zf5cC2dgIe/atrGC569tjXR+8vjpWdUfLz+JKeSEmQub GPDKF5zZw/7KH8Tvln3jzbxY2WrVuReAZqqPc/PHugD8kO4qlhyiGUTbw A==; X-IronPort-AV: E=Sophos;i="5.92,245,1650956400"; d="scan'208";a="170772872" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 04 Jul 2022 23:58:13 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 4 Jul 2022 23:58:12 -0700 Received: from kavya.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Mon, 4 Jul 2022 23:58:08 -0700 From: Kavyasree Kotagiri To: , , , , , CC: , , , , "Krzysztof Kozlowski" Subject: [PATCH v6 1/3] dt-bindings: mfd: atmel,flexcom: Convert to json-schema Date: Tue, 5 Jul 2022 04:57:56 -0200 Message-ID: <20220705065758.17051-2-kavyasree.kotagiri@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> References: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220704_235813_537458_86E4F42A X-CRM114-Status: GOOD ( 17.50 ) 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 Convert the Atmel flexcom device tree bindings to json schema. Signed-off-by: Kavyasree Kotagiri Reviewed-by: Krzysztof Kozlowski --- v5 -> v6: - Removed spi node from example as suggested by Rob and also pattern properties(spi dt-bindings conversion to yaml patch is under review). Once that is accepted, I will add back spi example through new patch. v4 -> v5: - Fixed indentations. v3 -> v4: - Corrected format of enum used for compatible string. v2 -> v3: - used enum for compatible string. - changed irq flag to IRQ_TYPE_LEVEL_HIGH in example. - fixed dtschema errors. v1 -> v2: - Fix title. .../bindings/mfd/atmel,flexcom.yaml | 72 +++++++++++++++++++ .../devicetree/bindings/mfd/atmel-flexcom.txt | 63 ---------------- 2 files changed, 72 insertions(+), 63 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml delete mode 100644 Documentation/devicetree/bindings/mfd/atmel-flexcom.txt diff --git a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml new file mode 100644 index 000000000000..f577b8d8e1ea --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/atmel,flexcom.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel Flexcom (Flexible Serial Communication Unit) + +maintainers: + - Kavyasree Kotagiri + +description: + The Atmel Flexcom is just a wrapper which embeds a SPI controller, + an I2C controller and an USART. Only one function can be used at a + time and is chosen at boot time according to the device tree. + +properties: + compatible: + enum: + - atmel,sama5d2-flexcom + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 1 + + ranges: + description: + One range for the full I/O register region. (including USART, + TWI and SPI registers). + items: + maxItems: 3 + + atmel,flexcom-mode: + description: | + Specifies the flexcom mode as follows: + 1: USART + 2: SPI + 3: I2C. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 3] + +required: + - compatible + - reg + - clocks + - "#address-cells" + - "#size-cells" + - ranges + - atmel,flexcom-mode + +additionalProperties: false + +examples: + - | + #include + + flx0: flexcom@f8034000 { + compatible = "atmel,sama5d2-flexcom"; + reg = <0xf8034000 0x200>; + clocks = <&flx0_clk>; + ranges = <0x0 0xf8034000 0x800>; + atmel,flexcom-mode = <2>; + }; +... diff --git a/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt b/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt deleted file mode 100644 index 9d837535637b..000000000000 --- a/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt +++ /dev/null @@ -1,63 +0,0 @@ -* Device tree bindings for Atmel Flexcom (Flexible Serial Communication Unit) - -The Atmel Flexcom is just a wrapper which embeds a SPI controller, an I2C -controller and an USART. Only one function can be used at a time and is chosen -at boot time according to the device tree. - -Required properties: -- compatible: Should be "atmel,sama5d2-flexcom" -- reg: Should be the offset/length value for Flexcom dedicated - I/O registers (without USART, TWI or SPI registers). -- clocks: Should be the Flexcom peripheral clock from PMC. -- #address-cells: Should be <1> -- #size-cells: Should be <1> -- ranges: Should be one range for the full I/O register region - (including USART, TWI and SPI registers). -- atmel,flexcom-mode: Should be one of the following values: - - <1> for USART - - <2> for SPI - - <3> for I2C - -Required child: -A single available child device of type matching the "atmel,flexcom-mode" -property. - -The phandle provided by the clocks property of the child is the same as one for -the Flexcom parent. - -For other properties, please refer to the documentations of the respective -device: -- ../serial/atmel-usart.txt -- ../spi/spi_atmel.txt -- ../i2c/i2c-at91.txt - -Example: - -flexcom@f8034000 { - compatible = "atmel,sama5d2-flexcom"; - reg = <0xf8034000 0x200>; - clocks = <&flx0_clk>; - #address-cells = <1>; - #size-cells = <1>; - ranges = <0x0 0xf8034000 0x800>; - atmel,flexcom-mode = <2>; - - spi@400 { - compatible = "atmel,at91rm9200-spi"; - reg = <0x400 0x200>; - interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>; - pinctrl-names = "default"; - pinctrl-0 = <&pinctrl_flx0_default>; - #address-cells = <1>; - #size-cells = <0>; - clocks = <&flx0_clk>; - clock-names = "spi_clk"; - atmel,fifo-size = <32>; - - flash@0 { - compatible = "atmel,at25f512b"; - reg = <0>; - spi-max-frequency = <20000000>; - }; - }; -}; From patchwork Tue Jul 5 06:57:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kavyasree Kotagiri X-Patchwork-Id: 12905977 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 5B7B0C43334 for ; Tue, 5 Jul 2022 07:00:19 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nbUs8JhAc3am8twnG/ah4ZZM1jYAaqiSWPUDSI1GdPg=; b=g+fk0CV+1Zf+m3 bSI6efJqbSh2FyUzcPot5j0B1njLheHA4J/FfBa71aurY8TQAyX+vj+LlF6d1rNIVJdCoW+J6/rqj hLmgTUQgQMqVQq3flm0KvpZbmUR89Mhexhkn99eXiS5VxbWtuLzgWybSGBBX662Dt2R9upyUqSWHZ wmOc+0HOiaGkn68i9eZjZiNvaaCVmWMc3TDsNAUpSKRrOQIIQvTpZQBCLG+86O9MyIg4ld+g65eXp H3jqu6Hl5YKksYZQggeCOU2EZyXZo/XC9g0SEOJJ8r/r0ao5GTTn3ZVKnoHH18pPLPey6CME+d/aL X3PvCr4qlGrVWuVrkDEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cWf-00FHje-2v; Tue, 05 Jul 2022 06:59:13 +0000 Received: from esa.microchip.iphmx.com ([68.232.154.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cVo-00FGwy-8v for linux-arm-kernel@lists.infradead.org; Tue, 05 Jul 2022 06:58:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1657004299; x=1688540299; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VkEQlmvh2BIE78NCfcXTBmqm8BrRNRSbLJGqVTHxzwA=; b=QIafgtOquuOjG139FMhjBPlTzuJKSCiHpwIzjUBR7LnGytJiFKApwXcZ 3hbl6qnchwTFWClCuADFC6cre7eA87UDN2Ag/ALJdGHaIlKjGWVBjJzTp Eh4zOda9zfOJ34MEeNTEr/xK8knpCForbysPy40eN6KCIxPeDyzn9PTft ZLlA+iz2ShymXl8QDU9a53bdk+pMQ2QXwfuO0YxifxyVvkB+JtHQWcOrR 8aqJ5fd5e3rZb1i3hHXRrEqJE2ILSQKI7VP0REiRFhciFBKJjOIAuZ0YF B0xFH8z7VCSYUuQ37uu/G6w5BNszmU/rLnhZrPyEVo7lDEaf0O08CvBHT Q==; X-IronPort-AV: E=Sophos;i="5.92,245,1650956400"; d="scan'208";a="166371625" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 04 Jul 2022 23:58:18 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 4 Jul 2022 23:58:18 -0700 Received: from kavya.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Mon, 4 Jul 2022 23:58:14 -0700 From: Kavyasree Kotagiri To: , , , , , CC: , , , , "Krzysztof Kozlowski" Subject: [PATCH v6 2/3] dt-bindings: mfd: atmel,flexcom: Add new compatible string for lan966x Date: Tue, 5 Jul 2022 04:57:57 -0200 Message-ID: <20220705065758.17051-3-kavyasree.kotagiri@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> References: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220704_235820_418083_D747A325 X-CRM114-Status: GOOD ( 10.39 ) 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 LAN966x SoC flexcoms has two optional I/O lines. Namely, CS0 and CS1 in flexcom SPI mode. CTS and RTS in flexcom USART mode. These pins can be mapped to lan966x FLEXCOM_SHARED[0-20] pins and usage depends on functions being configured. Signed-off-by: Kavyasree Kotagiri Reviewed-by: Krzysztof Kozlowski --- v5 -> v6: - Removed spi node from flx3 example. v4 -> v5: - Fixed indentations and dt-schema errors. - No errors seen with 'make dt_binding_check'. v3 -> v4: - Added else condition to allOf:if:then. v2 -> v3: - Add reg property of lan966x missed in v2. v1 -> v2: - Use allOf:if:then for lan966x dt properties .../bindings/mfd/atmel,flexcom.yaml | 63 ++++++++++++++++++- 1 file changed, 62 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml index f577b8d8e1ea..f90973ffa472 100644 --- a/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml +++ b/Documentation/devicetree/bindings/mfd/atmel,flexcom.yaml @@ -18,9 +18,11 @@ properties: compatible: enum: - atmel,sama5d2-flexcom + - microchip,lan966x-flexcom reg: - maxItems: 1 + minItems: 1 + maxItems: 2 clocks: maxItems: 1 @@ -47,6 +49,27 @@ properties: $ref: /schemas/types.yaml#/definitions/uint32 enum: [1, 2, 3] + microchip,flx-shrd-pins: + description: Specify the Flexcom shared pins to be used for flexcom + chip-selects. + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 1 + maxItems: 2 + items: + minimum: 0 + maximum: 20 + + microchip,flx-cs: + description: Flexcom chip selects. Here, value of '0' represents "cts" line + of flexcom USART or "cs0" line of flexcom SPI and value of '1' represents + "rts" line of flexcom USART or "cs1" line of flexcom SPI. + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 1 + maxItems: 2 + items: + minimum: 0 + maximum: 1 + required: - compatible - reg @@ -56,6 +79,31 @@ required: - ranges - atmel,flexcom-mode +allOf: + - if: + properties: + compatible: + contains: + const: microchip,lan966x-flexcom + + then: + properties: + reg: + items: + - description: Flexcom base registers map + - description: Flexcom shared registers map + required: + - microchip,flx-shrd-pins + - microchip,flx-cs + + else: + properties: + reg: + items: + - description: Flexcom base registers map + microchip,flx-shrd-pins: false + microchip,flx-cs: false + additionalProperties: false examples: @@ -69,4 +117,17 @@ examples: ranges = <0x0 0xf8034000 0x800>; atmel,flexcom-mode = <2>; }; + - | + #include + + flx3: flexcom@e0064000 { + compatible = "microchip,lan966x-flexcom"; + reg = <0xe0064000 0x100>, + <0xe2004180 0x8>; + clocks = <&flx0_clk>; + ranges = <0x0 0xe0040000 0x800>; + atmel,flexcom-mode = <2>; + microchip,flx-shrd-pins = <9>; + microchip,flx-cs = <0>; + }; ... From patchwork Tue Jul 5 06:57:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kavyasree Kotagiri X-Patchwork-Id: 12905978 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 41339CCA47B for ; Tue, 5 Jul 2022 07:01:25 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7lBeNkuNw7rBeP5KIIPeRsaSYuPQL412wHLNcug8ecY=; b=pjB5JS1c/wVcMo YP1jMHGRH2XNfxBPKWWM/8biW/sSjcMk30eiA0lCSfkU9yk3/FOXqzTC9mO3/yRpsqSRbFjpinIcB bgJzdVwY4E6Hk4tmA8YCHpM8XHE+0M0p0lxXcwZNnO9cgkpT91Yc8+xl6I8NhevnsJvYwSEjFwKYD H/chyv/T8uzuUF8eAfhaA/+Xyeg7V/RRAdDrtpu3PhJfdHU+zTnf0KmQcnOjmmSqDPau0S6ESa0aB vBF6LnDmSvMcfxxgWWzk5ECcZy2XU8IESW5AuLShQT8EmBYzADEiqbYRg29xJuPR2KWivZsV4ZbXl Yx3dVxBnYSueOZ+yUWvA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cXD-00FIL8-BD; Tue, 05 Jul 2022 06:59:47 +0000 Received: from esa.microchip.iphmx.com ([68.232.154.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8cVw-00FH7o-Ks for linux-arm-kernel@lists.infradead.org; Tue, 05 Jul 2022 06:58:30 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1657004308; x=1688540308; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lnRk34B5OQak8r1cu0RoxwYWhR4e+QHJyC8sO6f5vZI=; b=hvhX4s6H/mXZpMJh/bhcWHOfkmC0hZpcHoNSMmFBj0dbTWqd3gUJ/yVU QCGuq/gBBrXDS99ZBdqRL0ovPlkxcdRzs6a5D4MEtvKkhryy62EaKnRbs 0V5zvnIG382rtrSAgK/nve3rVKVLjlX8f1Y/U8FgCtFi8LJMjB2i4trTR ewGE/ehLxNaw/nC7PIlO4TsH3ieXvMR2zFVRO3B52B/DR1JxCHiyB483I 0EPXmCvPNq/9vJWr38BZ0ZW779ejDxz975ctxlgelHxl9RtTg1JHNWy63 9Ty1pZMGdldcHfInYscLcbzaGeZ+vFopwhwnRc84FRqUtrNR2pPhkRUFY g==; X-IronPort-AV: E=Sophos;i="5.92,245,1650956400"; d="scan'208";a="103020754" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 04 Jul 2022 23:58:27 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 4 Jul 2022 23:58:26 -0700 Received: from kavya.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Mon, 4 Jul 2022 23:58:22 -0700 From: Kavyasree Kotagiri To: , , , , , CC: , , , Subject: [PATCH v6 3/3] mfd: atmel-flexcom: Add support for lan966x flexcom chip-select configuration Date: Tue, 5 Jul 2022 04:57:58 -0200 Message-ID: <20220705065758.17051-4-kavyasree.kotagiri@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> References: <20220705065758.17051-1-kavyasree.kotagiri@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220704_235828_805633_2FA6E013 X-CRM114-Status: GOOD ( 20.31 ) 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 LAN966x SoC have 5 flexcoms. Each flexcom has 2 chip-selects which are optional I/O lines. For each chip select of each flexcom there is a configuration register FLEXCOM_SHARED[0-4]:SS_MASK[0-1]. The width of configuration register is 21 because there are 21 shared pins on each of which the chip select can be mapped. Each bit of the register represents a different FLEXCOM_SHARED pin. Signed-off-by: Kavyasree Kotagiri Reviewed-by: Claudiu Beznea --- v5 -> v6: - No changes. v4 -> v5: - No changes. v3 -> v4: - Add condition for a flexcom whether to configure chip-select lines or not, based on "microchip,flx-shrd-pins" property existence because chip-select lines are optional. v2 -> v3: - used goto label for clk_disable in error cases. v1 -> v2: - use GENMASK for mask, macros for maximum allowed values. - use u32 values for flexcom chipselects instead of strings. - disable clock in case of errors. drivers/mfd/atmel-flexcom.c | 94 ++++++++++++++++++++++++++++++++++++- 1 file changed, 93 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/atmel-flexcom.c b/drivers/mfd/atmel-flexcom.c index 33caa4fba6af..430b6783b5a7 100644 --- a/drivers/mfd/atmel-flexcom.c +++ b/drivers/mfd/atmel-flexcom.c @@ -28,15 +28,68 @@ #define FLEX_MR_OPMODE(opmode) (((opmode) << FLEX_MR_OPMODE_OFFSET) & \ FLEX_MR_OPMODE_MASK) +/* LAN966x flexcom shared register offsets */ +#define FLEX_SHRD_SS_MASK_0 0x0 +#define FLEX_SHRD_SS_MASK_1 0x4 +#define FLEX_SHRD_PIN_MAX 20 +#define FLEX_CS_MAX 1 +#define FLEX_SHRD_MASK GENMASK(20, 0) + +struct atmel_flex_caps { + bool has_flx_cs; +}; + struct atmel_flexcom { void __iomem *base; + void __iomem *flexcom_shared_base; u32 opmode; struct clk *clk; }; +static int atmel_flexcom_lan966x_cs_config(struct platform_device *pdev) +{ + struct atmel_flexcom *ddata = dev_get_drvdata(&pdev->dev); + struct device_node *np = pdev->dev.of_node; + u32 flx_shrd_pins[2], flx_cs[2], val; + int err, i, count; + + count = of_property_count_u32_elems(np, "microchip,flx-shrd-pins"); + if (count <= 0 || count > 2) { + dev_err(&pdev->dev, "Invalid %s property (%d)\n", "flx-shrd-pins", + count); + return -EINVAL; + } + + err = of_property_read_u32_array(np, "microchip,flx-shrd-pins", flx_shrd_pins, count); + if (err) + return err; + + err = of_property_read_u32_array(np, "microchip,flx-cs", flx_cs, count); + if (err) + return err; + + for (i = 0; i < count; i++) { + if (flx_shrd_pins[i] > FLEX_SHRD_PIN_MAX) + return -EINVAL; + + if (flx_cs[i] > FLEX_CS_MAX) + return -EINVAL; + + val = ~(1 << flx_shrd_pins[i]) & FLEX_SHRD_MASK; + + if (flx_cs[i] == 0) + writel(val, ddata->flexcom_shared_base + FLEX_SHRD_SS_MASK_0); + else + writel(val, ddata->flexcom_shared_base + FLEX_SHRD_SS_MASK_1); + } + + return 0; +} + static int atmel_flexcom_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; + const struct atmel_flex_caps *caps; struct resource *res; struct atmel_flexcom *ddata; int err; @@ -76,13 +129,52 @@ static int atmel_flexcom_probe(struct platform_device *pdev) */ writel(FLEX_MR_OPMODE(ddata->opmode), ddata->base + FLEX_MR); + caps = of_device_get_match_data(&pdev->dev); + if (!caps) { + dev_err(&pdev->dev, "Could not retrieve flexcom caps\n"); + err = -EINVAL; + goto clk_disable; + } + + if (caps->has_flx_cs && of_property_read_bool(np, "microchip,flx-shrd-pins")) { + ddata->flexcom_shared_base = devm_platform_get_and_ioremap_resource(pdev, 1, NULL); + if (IS_ERR(ddata->flexcom_shared_base)) { + err = dev_err_probe(&pdev->dev, + PTR_ERR(ddata->flexcom_shared_base), + "failed to get flexcom shared base address\n"); + goto clk_disable; + } + + err = atmel_flexcom_lan966x_cs_config(pdev); + if (err) + goto clk_disable; + } + +clk_disable: clk_disable_unprepare(ddata->clk); + if (err) + return err; return devm_of_platform_populate(&pdev->dev); } +static const struct atmel_flex_caps atmel_flexcom_caps = {}; + +static const struct atmel_flex_caps lan966x_flexcom_caps = { + .has_flx_cs = true, +}; + static const struct of_device_id atmel_flexcom_of_match[] = { - { .compatible = "atmel,sama5d2-flexcom" }, + { + .compatible = "atmel,sama5d2-flexcom", + .data = &atmel_flexcom_caps, + }, + + { + .compatible = "microchip,lan966x-flexcom", + .data = &lan966x_flexcom_caps, + }, + { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, atmel_flexcom_of_match);