From patchwork Tue Mar 29 15:29:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 555237 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 167B5C3526F for ; Tue, 29 Mar 2022 15:29:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238609AbiC2PbD (ORCPT ); Tue, 29 Mar 2022 11:31:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238586AbiC2Pa7 (ORCPT ); Tue, 29 Mar 2022 11:30:59 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67233F7F51; Tue, 29 Mar 2022 08:29:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648567756; x=1680103756; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DNunbYDvPM71E+oAn/SOKUWabTWxhBKKB0W3yFW6B0c=; b=bjOmGtbIwl5B9iEEPikudLtvoL4m23hYlRzPC5NQwrAs25FMYKbDvQg8 pujaMaCgQvYfPGK0GXfitvCZLlgbWezZzcFOINmf4NZwVKBp7YHwZsGSt 9NGnCUrENozqv7tJ7hGSeBp6+HOGhoc7bwcKWC0wJpROFCkoGPJzxOkEf bK0+cIZvkBWUDCBJypuWE9lKSm1E76bL2DbXY0MkiM9tR9F90FjaQSUYl I2NPsPRrZcHSBX2giaQMSBkZYf0RwpY1LABNsF877CjEtpgJPR8XE1uCa pQDJd/7rKXZH56UqcXo1QoNV1C8SNb1lFLktJGsUmgpyJ0j+vLv9neF4s g==; X-IronPort-AV: E=McAfee;i="6200,9189,10301"; a="241430660" X-IronPort-AV: E=Sophos;i="5.90,220,1643702400"; d="scan'208";a="241430660" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2022 08:29:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,220,1643702400"; d="scan'208";a="653044837" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga004.jf.intel.com with ESMTP; 29 Mar 2022 08:29:07 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 17FB01A1; Tue, 29 Mar 2022 18:29:29 +0300 (EEST) From: Andy Shevchenko To: Qianggui Song , Andy Shevchenko , Krzysztof Kozlowski , Fabien Dessenne , linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, linux-renesas-soc@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com Cc: Linus Walleij , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Avi Fishman , Tomer Maimon , Tali Perry , Patrick Venture , Nancy Yuen , Benjamin Fair , Geert Uytterhoeven , Tomasz Figa , Sylwester Nawrocki , Alim Akhtar , Maxime Coquelin , Alexandre Torgue , Bartosz Golaszewski , Philipp Zabel Subject: [PATCH v2 02/13] gpiolib: Introduce gpiochip_node_count() helper Date: Tue, 29 Mar 2022 18:29:15 +0300 Message-Id: <20220329152926.50958-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220329152926.50958-1-andriy.shevchenko@linux.intel.com> References: <20220329152926.50958-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org The gpiochip_node_count() helper iterates over the device child nodes that have the "gpio-controller" property set. It returns the number of such nodes under a given device. Signed-off-by: Andy Shevchenko Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven --- include/linux/gpio/driver.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index e6b9c17614ef..bc2ea9f65022 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -755,4 +755,16 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc, device_for_each_child_node(dev, child) \ if (!fwnode_property_present(child, "gpio-controller")) {} else +static inline unsigned int gpiochip_node_count(struct device *dev) +{ + struct fwnode_handle *child; + unsigned int count; + + count = 0; + for_each_gpiochip_node(dev, child) + count++; + + return count; +} + #endif /* __LINUX_GPIO_DRIVER_H */