From patchwork Wed Oct 11 20:26:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 732938 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63B29CDB488 for ; Wed, 11 Oct 2023 20:26:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376381AbjJKU0x (ORCPT ); Wed, 11 Oct 2023 16:26:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376386AbjJKU0u (ORCPT ); Wed, 11 Oct 2023 16:26:50 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F18293; Wed, 11 Oct 2023 13:26:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697056009; x=1728592009; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=bRyQlSHpeOLdYLvwN2SQBQmioztVBGvZYUmThNk322Y=; b=Qe1ut4p615zXxS5m9Y2RkWTU9HIeiLG6pQBt4cKi8/hAunDHyCr6XkF+ aWHlflxAOG48R4FhFVjPnRqIC+nxVvwfMudJm4BFo02wZXomg8btxNQxB vdKofhx1tK1pDkoabkA/XkuRi0x4tntCl6EvZacijLVGasnJvW/1T8pcp i4pW85tauzMHCvVyOaXAcl14ZfA3FzYJnGU8n/dBHNGoU6FjhEugcEf3H TMnZcPq5mV4fZvhr+WClvE2XaJx33aKcZZwbX0cowAbpOMGkMFsPCSsj4 +V4Z7kH/2TVpdlCCpa5YXBWNmtKVrqP4tjdtCVt97ykKluhTAhxLxWU24 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10860"; a="471015140" X-IronPort-AV: E=Sophos;i="6.03,217,1694761200"; d="scan'208";a="471015140" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Oct 2023 13:26:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10860"; a="783393504" X-IronPort-AV: E=Sophos;i="6.03,217,1694761200"; d="scan'208";a="783393504" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga008.jf.intel.com with ESMTP; 11 Oct 2023 13:26:43 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 0BA25345; Wed, 11 Oct 2023 23:26:41 +0300 (EEST) From: Andy Shevchenko To: Bartosz Golaszewski , Andy Shevchenko , Linus Walleij , Dipen Patel , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, timestamp@lists.linux.dev, linux-tegra@vger.kernel.org Cc: Bartosz Golaszewski , Andy Shevchenko , Thierry Reding , Jonathan Hunter Subject: [PATCH v2 1/4] gpiolib: provide gpio_device_find_by_fwnode() Date: Wed, 11 Oct 2023 23:26:35 +0300 Message-Id: <20231011202638.372382-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.40.0.1.gaa8946217a0b In-Reply-To: <20231011202638.372382-1-andriy.shevchenko@linux.intel.com> References: <20231011202638.372382-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org One of the ways of looking up GPIO devices is using their fwnode. Provide a helper for that to avoid every user implementing their own matching function. Reviewed-by: Dipen Patel Tested-by: Dipen Patel Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20231010151709.4104747-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko --- drivers/gpio/gpiolib.c | 20 ++++++++++++++++++++ include/linux/gpio/driver.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 7b4d12b714a3..31c06a32cb8a 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1142,6 +1142,26 @@ struct gpio_device *gpio_device_find_by_label(const char *label) } EXPORT_SYMBOL_GPL(gpio_device_find_by_label); +static int gpio_chip_match_by_fwnode(struct gpio_chip *gc, void *fwnode) +{ + return device_match_fwnode(&gc->gpiodev->dev, fwnode); +} + +/** + * gpio_device_find_by_fwnode() - wrapper around gpio_device_find() finding + * the GPIO device by its fwnode + * @fwnode: Firmware node to lookup + * + * Returns: + * Reference to the GPIO device or NULL. Reference must be released with + * gpio_device_put(). + */ +struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode) +{ + return gpio_device_find((void *)fwnode, gpio_chip_match_by_fwnode); +} +EXPORT_SYMBOL_GPL(gpio_device_find_by_fwnode); + /** * gpio_device_get() - Increase the reference count of this GPIO device * @gdev: GPIO device to increase the refcount for diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index f8ad7f40100c..ae4162d3f1d3 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -611,6 +611,7 @@ struct gpio_chip *gpiochip_find(void *data, struct gpio_device *gpio_device_find(void *data, int (*match)(struct gpio_chip *gc, void *data)); struct gpio_device *gpio_device_find_by_label(const char *label); +struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode); struct gpio_device *gpio_device_get(struct gpio_device *gdev); void gpio_device_put(struct gpio_device *gdev);