From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE418C433FE for ; Tue, 5 Oct 2021 14:38:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6F82613E6 for ; Tue, 5 Oct 2021 14:38:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234823AbhJEOkG (ORCPT ); Tue, 5 Oct 2021 10:40:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234084AbhJEOkF (ORCPT ); Tue, 5 Oct 2021 10:40:05 -0400 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8086AC061749 for ; Tue, 5 Oct 2021 07:38:14 -0700 (PDT) Received: by mail-lf1-x12e.google.com with SMTP id r19so4517396lfe.10 for ; Tue, 05 Oct 2021 07:38:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=semihalf-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=klTjczTUx8b1c2tX38XlKQEw8mKHpQEoY//ZV2AWwv8=; b=Dt8fAg1I9xPaomCa7reH7OK7NJBIuG3OckiqCfqYhOscZS+aDefAdl2iB6gSGYc9N8 FWy4PDKwKyaeGINQDfSU+6/FBU8W2XimCAdNYeQAQ/yWL5WwZd6iCnfQQBRBP1g7DC6f vLM0zBqkF++xS5L5lTB3R/2D1vO5dxzLFDjFb50sfpu7WYK0pdYEvIi1gcO8GBaDGfnm fh1wWuUp7K97RzDezKc/7D1y1AK9c82a9Y8QmOT7ySgQYgQTM4LKqn1uWWEEW2t8q1uy FXPACkkrzTjyQMyaektNdKcOQ3M9x7HIp3bTHhSlCyhsoNjUWaaeTrWdBF6eUGbNP2SE ePWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=klTjczTUx8b1c2tX38XlKQEw8mKHpQEoY//ZV2AWwv8=; b=iMV5bemAbQXyneGujs54pUMJK2ULl1bgBeKrRhMyMfrcc34nfaMTkIHFUPlNhZOcYT 7a9GzM5HDir9pOzjKXhdAreBEVa29+fC4S0MgyAW9qIvZwGImUhPeKrQN2vz0niOn9l6 NyuzPgrIQdtkgEcPfuCTi/SuCHBvwZDzaj/oEcadiP4WWXUn+l8ON1f0iYKFTgaEKQLA /AKHuK8pxGXHSdoHIcmynbm8S+eEVZ8aYfwFgO6Mkzq+3nX+0qQu0d9jEeRPl/N0rLMA KBx+g/RzvvVXqj89uC6k/LsyMOdKmyrEd8x0oQuYzUFIjLrh21LZvAJ8MqhsPL2Hwf8A fFWw== X-Gm-Message-State: AOAM533Xzqxv5KE3XYLsShrKPi0BdX/YgBa2bqORb2NVlExlhIOjMK12 1oW+qGbMzRPROHm+3zgWizSWzw== X-Google-Smtp-Source: ABdhPJyClsOWQd1HOJx8+kEKXL8GXAvDh/ETWKrerqxRvGr3pDmCfDtf3PwnNF8948g8MDS7LYIO4w== X-Received: by 2002:a05:6512:32c1:: with SMTP id f1mr3769373lfg.471.1633444692745; Tue, 05 Oct 2021 07:38:12 -0700 (PDT) Received: from grasshopper.googchameleon.semihalf.net ([83.142.187.85]) by smtp.gmail.com with ESMTPSA id u25sm1973835lfc.176.2021.10.05.07.38.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 07:38:12 -0700 (PDT) From: =?UTF-8?q?Pawe=C5=82=20Anikiel?= List-Id: To: jarkko.nikula@linux.intel.com, andriy.shevchenko@linux.intel.com, mika.westerberg@linux.intel.com, robh+dt@kernel.org, p.zabel@pengutronix.de, arnd@arndb.de, olof@lixom.net, soc@kernel.org, dinguyen@kernel.org, p.yadav@ti.com, Tudor.Ambarus@microchip.com Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, alexandre.belloni@bootlin.com, sre@kernel.org, thunder.leizhen@huawei.com, Jonathan.Cameron@huawei.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ka@semihalf.com, tn@semihalf.com, jam@semihalf.com, amstan@google.com, =?UTF-8?q?Pawe=C5=82=20Anikiel?= Subject: [PATCH v2 1/4] i2c: check bus number property in DesignWare I2C Controller Date: Tue, 5 Oct 2021 16:37:45 +0200 Message-Id: <20211005143748.2471647-2-pan@semihalf.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211005143748.2471647-1-pan@semihalf.com> References: <20211005143748.2471647-1-pan@semihalf.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On SoCFPGA systems, it's desireable to have fixed numbering for i2c busses, while being able to enable/disable them (e.g. have i2c1 be mapped to /dev/i2c-1, even though i2c0 is disabled). This can also be achieved using devicetree aliases (see i2c_add_adapter). However, having the driver be self-contained without relying on aliases is more robust. Signed-off-by: Paweł Anikiel --- drivers/i2c/busses/i2c-designware-platdrv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 21113665ddea..f27e6bc9ad9d 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -280,7 +280,8 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) I2C_CLASS_HWMON : I2C_CLASS_DEPRECATED; ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); adap->dev.of_node = pdev->dev.of_node; - adap->nr = -1; + if (of_property_read_u32(pdev->dev.of_node, "busno", &adap->nr)) + adap->nr = -1; if (dev->flags & ACCESS_NO_IRQ_SUSPEND) { dev_pm_set_driver_flags(&pdev->dev, -- 2.25.1