From patchwork Sun Oct 6 05:39:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1172337 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="NpApFIed"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46mC9p36Czz9sPd for ; Sun, 6 Oct 2019 16:39:58 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726329AbfJFFj5 (ORCPT ); Sun, 6 Oct 2019 01:39:57 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:39923 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbfJFFjp (ORCPT ); Sun, 6 Oct 2019 01:39:45 -0400 Received: by mail-pf1-f194.google.com with SMTP id v4so6421296pff.6 for ; Sat, 05 Oct 2019 22:39:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=EZctdb2EuU+FP6ZJizqHnH1ZQoblRYPFlqyAYuvzD20=; b=NpApFIedXdrlmbEUK/h9l3WT4rH2EnNIsQlDII8fDOMAVwLlVyCUZVXmBytWP0yuFv pXpcL9URhY+tunDb9OFu5jCs4TkBCf+w7so/Yvfc00vcT4+pLUo8LgKTN5p5Dd4EeweD XZsEUTkaYPgmR4DeCdlNsKRLlJ5DYkiz/TKIiqwOcLxWcNwd+2QNUgQqjs7sxovPNkkV kaui8X0nKnZPYLez5EGbmwDeijGAYIk3CwVVefwgJFwg4zMG4E0ZxwYfoGscazT7cF9Y 97hFM5UBRhLxQ59cgK2wOI26glsXofjt5QhzGyT8WqMrqQuKiBYVeF2C0fmXQWvEym0K LAhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EZctdb2EuU+FP6ZJizqHnH1ZQoblRYPFlqyAYuvzD20=; b=OUtMDQ/OAYjvvepQNfWlgBPUf2F1dV7GeRHYOG5f0Hc3bv3NiDXjbosns860iWcBh0 W83YHPUYrmZ3qgCHhfb3/HNyk10rXsMMYmcO2mWnc6cS+OmSgjueCC+L0xgVvhIX3MvQ hNgUTYdrEIRclvisZCUQRT9R/F7mKbXa9wo/L/M7HX6htl+P9tH5Wxw8tCJDKqJA2hPW q9iU7Gv+83O4rV1wGOrwK0o3CZMBqs2/HoZDbN0teIFqR8IYBuGhPcUoLx+1gdClj3I0 +Md1OlsWxiBaBAS/3VQ8U/cYevcbU5iSZvr/NxY7FGCXVQBuPOOYDxwXq0k5BctWiLlk f1Ww== X-Gm-Message-State: APjAAAW1HJb8FZMKGgwpptSvTD1QZyBfDOUE/biG8hs+VodI4hvAl70n eAFk41tY3rQ4gVxYrqWSdHfZ+iT3v7aZsg== X-Google-Smtp-Source: APXvYqzS/NuH9G9b377gcdt8bKZ36+WUD+1e5Kp1+cmEBlnWIUitci4/fgTJ8hlQr7cc3bV+4iwF9w== X-Received: by 2002:a65:5a84:: with SMTP id c4mr23893162pgt.261.1570340383448; Sat, 05 Oct 2019 22:39:43 -0700 (PDT) Received: from debian-brgl.local (50-255-47-209-static.hfc.comcastbusiness.net. [50.255.47.209]) by smtp.gmail.com with ESMTPSA id q30sm10019320pja.18.2019.10.05.22.39.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Oct 2019 22:39:43 -0700 (PDT) From: Bartosz Golaszewski To: Jonathan Corbet , Greg Kroah-Hartman , "Rafael J . Wysocki" , Arnd Bergmann , Linus Walleij Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v3 6/8] drivers: provide devm_platform_ioremap_resource_byname() Date: Sun, 6 Oct 2019 07:39:14 +0200 Message-Id: <20191006053916.8849-7-brgl@bgdev.pl> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006053916.8849-1-brgl@bgdev.pl> References: <20191006053916.8849-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Bartosz Golaszewski Provide a variant of devm_platform_ioremap_resource() that allows to lookup resources from platform devices by name rather than by index. Signed-off-by: Bartosz Golaszewski --- .../driver-api/driver-model/devres.rst | 1 + drivers/base/platform.c | 20 +++++++++++++++++++ include/linux/platform_device.h | 3 +++ 3 files changed, 24 insertions(+) diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst index 480b78ca3871..4ab193319d8c 100644 --- a/Documentation/driver-api/driver-model/devres.rst +++ b/Documentation/driver-api/driver-model/devres.rst @@ -319,6 +319,7 @@ IOMAP devm_ioremap_resource_wc() devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device devm_platform_ioremap_resource_wc() + devm_platform_ioremap_resource_byname() devm_iounmap() pcim_iomap() pcim_iomap_regions() : do request_region() and iomap() on multiple BARs diff --git a/drivers/base/platform.c b/drivers/base/platform.c index d481b8a7d4fc..265d34253865 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -95,6 +95,26 @@ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev, res = platform_get_resource(pdev, IORESOURCE_MEM, index); return devm_ioremap_resource_wc(&pdev->dev, res); } + +/** + * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for + * a platform device, retrieve the + * resource by name + * + * @pdev: platform device to use both for memory resource lookup as well as + * resource management + * @name: name of the resource + */ +void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name) +{ + struct resource *res; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + return devm_ioremap_resource(&pdev->dev, res); +} +EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname); #endif /* CONFIG_HAS_IOMEM */ static int __platform_get_irq(struct platform_device *dev, unsigned int num) diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 83930790c701..fea5563f6fcf 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -60,6 +60,9 @@ devm_platform_ioremap_resource(struct platform_device *pdev, extern void __iomem * devm_platform_ioremap_resource_wc(struct platform_device *pdev, unsigned int index); +extern void __iomem * +devm_platform_ioremap_resource_byname(struct platform_device *pdev, + const char *name); extern int platform_get_irq(struct platform_device *, unsigned int); extern int platform_get_irq_optional(struct platform_device *, unsigned int); extern int platform_irq_count(struct platform_device *);