From patchwork Wed Oct 9 14:01:06 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: 13828486 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 138C1CEDD9A for ; Wed, 9 Oct 2024 14:06:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To: Content-Transfer-Encoding:Content-Type:MIME-Version:Message-Id:Date:Subject: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=meMdgwASJTSVQgcqYdIohoxaA+Loney7M/QLmYnOhZs=; b=k9LMRez/xYh1Ev P/5lXpwG1tGtA8x1k9WVETSigwAE478u0yydK5uxUgvd3KFcbqd9Z/o4ZNeulnpzs4Yb8J0VQRXT3 /LfXa/Pa0G1hlN+8sqkML3wzZv01c32AVABIIe+VNtTEDJAXuUR6pFVJMouFLNy+8HB5wYaNxAMg/ 5iyDZTbKyHBXXrn7pG8gKGQ1qomLcaravL6Nwja42Zy6zYbOMrY2BofWAGYQ5upLZCO7BihDxNMgJ DiHjo+sggglMJR7FUXM+FzsRw5OIpXlpLEy7SMrU0UHgEuqbkivdFeehs7BgnazWSXQKfcuOOhoGw 6zg+k5sD6C/K0UJcE8GA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1syXKx-00000009Wkv-0eGF; Wed, 09 Oct 2024 14:06:47 +0000 Received: from relay8-d.mail.gandi.net ([217.70.183.201]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1syXFX-00000009VIN-08jy for linux-arm-kernel@lists.infradead.org; Wed, 09 Oct 2024 14:01:14 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 5D7D71BF20A; Wed, 9 Oct 2024 14:01:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1728482467; 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; bh=meMdgwASJTSVQgcqYdIohoxaA+Loney7M/QLmYnOhZs=; b=cSmlJlHILjk/s2eeKZUUNwUfWBXw1ZL0a6VKOIxXTRh3Bw5nBRk7D4K+cqQjBj6AeIirK+ LZQtEc0QnZdmFLdgimtgY7+PoC//8GBays7Czyq4NeoAeYSIzWrDo9RJDY+mQ1cN/8oiti bjbfxZEi9LPblK11/kUe5Pz3d2bt3etFtCyqB9IIt2G5Ol/sJqXSzg2CSutkOwDnnXkF7q LPFIWBNQVVJTgPB9M8KKvHf9RdYpCUWKptPWXp8sKbAWScIVEUa5WgaVaRJFWMO8rGEQL8 vyyBEuKPQNFEOliZ3wGSWFT0+n/PFVxevlBpxGwKL6TNPQJKf8trtJeJiF7t1w== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Subject: [PATCH v3 0/6] i2c: nomadik: support >=1MHz & Mobileye EyeQ6H platform Date: Wed, 09 Oct 2024 16:01:06 +0200 Message-Id: <20241009-mbly-i2c-v3-0-e7fd13bcf1c4@bootlin.com> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAKKMBmcC/1WMwQ6CMBAFf4X0bM12QUo9+R/GQylFNgFqWtJIC P9uITHicV7ezMKC9WQDu2YL8zZSIDcmyE8ZM50en5ZTk5ghYCEAJB/qfuaEhmMpjWqKCmsFLN1 f3rb03lP3R+KOwuT8vJej2NZvpPpFouDANZRG5EJqbOWtdm7qaTwbN7AtE/GoqoOKm2oU5qCrR pvLv7qu6wfMVucp3QAAAA== X-Change-ID: 20241007-mbly-i2c-267c9d482b90 To: Linus Walleij , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Vladimir Kondratiev , =?utf-8?q?Gr=C3=A9?= =?utf-8?q?gory_Clement?= , Thomas Petazzoni , Tawfik Bayouk , =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.14.2 X-GND-Sasl: theo.lebrun@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241009_070111_398308_D51CD8F8 X-CRM114-Status: GOOD ( 12.04 ) 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 Hi, Three patches are about adding Mobileye EyeQ6H support to the Nomadik I2C controller driver, in the same vein as was done a few months ago for EyeQ5. - dt-bindings: - [PATCH 1/6]: add new compatible. - driver: - [PATCH 3/6]: we switch from using a match table, before adding the new EyeQ6H compatible. - [PATCH 4/6]: adding EyeQ6H is only about creating a new match table entry thanks to the previous patch; we reuse the .has_32b_bus flag created for EyeQ5. Three patches are about supporting higher speeds (fast-plus and high-speed). - dt-bindings: - [PATCH 2/6]: fix them, they indicated only a max of 400kHz. - driver: - [PATCH 5/6]: fix computation of the bus rate clock divider (BRCR). For a bus rate of 400kHz, it would pick >400kHz. Now pick <400kHz. - [PATCH 6/6]: support high SM (speed-mode) values. This is not much work. It works on EyeQ6H HW just fine. 1MHz has been tested but not 3.4MHz because HW doesn't support it. The theory is there, and BRCR computation has been checked to be valid with 3.4MHz clocks. DTS patches targeting EyeQ5 & EyeQ6H devicetrees are not provided because they depend on the platform's clock series [0]. Have a nice day, Théo [0]: https://lore.kernel.org/lkml/20241007-mbly-clk-v5-0-e9d8994269cb@bootlin.com/ Signed-off-by: Théo Lebrun --- Changes in v3: - [PATCH 5/6] "i2c: nomadik: fix BRCR computation": - Use DIV_ROUND_UP() for BRCR calculation. - Improve code comment. - Add small note in commit message about DIV_ROUND_UP() usage. - For all patches but [PATCH 5/6], apply Reviewed-by: Linus Walleij. - Link to v2: https://lore.kernel.org/r/20241009-mbly-i2c-v2-0-ac9230a8dac5@bootlin.com Changes in v2: - dt-bindings: change `clock-frequency: maximum` from 400kHz to 3.4MHz in a separate patch. - dt-bindings: use enum to list compatibles. - Switch away from of_device_is_compatible() in probe. Use a match table with flags inside .data, using of_match_device() from probe. This is done as a separate commit before adding EyeQ6H support. - Link to v1: https://lore.kernel.org/r/20241008-mbly-i2c-v1-0-a06c1317a2f7@bootlin.com --- Théo Lebrun (6): dt-bindings: i2c: nomadik: add mobileye,eyeq6h-i2c bindings dt-bindings: i2c: nomadik: support 400kHz < clock-frequency <= 3.4MHz i2c: nomadik: switch from of_device_is_compatible() to of_match_device() i2c: nomadik: support Mobileye EyeQ6H I2C controller i2c: nomadik: fix BRCR computation i2c: nomadik: support >=1MHz speed modes .../devicetree/bindings/i2c/st,nomadik-i2c.yaml | 13 ++-- drivers/i2c/busses/i2c-nomadik.c | 89 +++++++++++++--------- 2 files changed, 61 insertions(+), 41 deletions(-) --- base-commit: 6f1cfa7816af8b3286140f1b0476200d5e914eb9 change-id: 20241007-mbly-i2c-267c9d482b90 Best regards,