From patchwork Wed Mar 30 14:50:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12795941 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 EC839C433F5 for ; Wed, 30 Mar 2022 14:51:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/tp6toumOjLy6ooFeiBFffYU1VjdGTuIfYJ400cvq4Y=; b=aNW5xBGeiRvtgn BZ+C27SSU95FOYTQqnYBStmBkHawLETFmGat1/ZyjlRtRmMRwZs3nP1BPlnRCiXYvMVymE+hp+cdr WctuCztnQQp0WX5G6P+iDixrXO+anGbfmqVZs5aFXzpomAR6PaoJW4zpluBlmzGP4YJRmAxx+Z9qn xrdVH9aekpCY4DB7AnEgR25+tFAt9BeSZteL7I9Ax4qmqCV2hL3S7sYx9mECjw7mnVsuc18VK2AHo RjGteq9S16Yk0cqI+/RGI2yxrayigCL79XX4qd2CzDK01/jTFNoJ/XldZ8Nwea49DCYSlTyYPqcbN uaWvKvjdd4U4UZYUgyoA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nZZfh-00GJ9O-Ut; Wed, 30 Mar 2022 14:51:42 +0000 Received: from mga03.intel.com ([134.134.136.65]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nZZeT-00GIY9-7E; Wed, 30 Mar 2022 14:50:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648651825; x=1680187825; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DFJ8vSWxdkQP5rCMWcqpqf0iMOqCrH1H7hLKYmjSIpU=; b=PB1I+vRD3cXxE7aA3W6FmGaCZjtn/NiUJcCjGjGgnOsPkUF+7Phw5gGY OPAghVn4Ql8ylAGY2+Uew6v5i44z06cuJaRQ6KFSLYM8haiKur+Yji6Cp uR05AZe96GKVo1QWyaBc+FfHjDnegAXsS+/SMYOoITyZV/vi/78t40Jxz U632yUHrT1Kl5LZe38IRQ17m6U4FB4hfRP90HwljhFVoDdk9fVcLW7jTg MQxcEfA+C+G9eaMPZ3TU94eyau9jJcJqWtA9suduDywcq52GnL1S6JIr1 7PUNoWKpXkO158mRyuTcb7Hnh4tfOcwCFNV0QtWFgGMtOGqFUwoLKJjy0 A==; X-IronPort-AV: E=McAfee;i="6200,9189,10301"; a="259533305" X-IronPort-AV: E=Sophos;i="5.90,222,1643702400"; d="scan'208";a="259533305" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2022 07:50:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,222,1643702400"; d="scan'208";a="618556021" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga004.fm.intel.com with ESMTP; 30 Mar 2022 07:50:11 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 3232C1C3; Wed, 30 Mar 2022 17:50:33 +0300 (EEST) From: Andy Shevchenko To: Qianggui Song , Andy Shevchenko , Geert Uytterhoeven , Krzysztof Kozlowski , Fabien Dessenne , Linus Walleij , 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: 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 , Tomasz Figa , Sylwester Nawrocki , Alim Akhtar , Maxime Coquelin , Alexandre Torgue , Bartosz Golaszewski , Philipp Zabel Subject: [PATCH v3 02/13] gpiolib: Introduce gpiochip_node_count() helper Date: Wed, 30 Mar 2022 17:50:19 +0300 Message-Id: <20220330145030.1562-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220330145030.1562-1-andriy.shevchenko@linux.intel.com> References: <20220330145030.1562-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220330_075025_374621_B7F810C8 X-CRM114-Status: GOOD ( 11.82 ) X-BeenThere: linux-amlogic@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-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.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 | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 2142ffc7338c..e38565a5056c 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -752,4 +752,15 @@ 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 = 0; + + for_each_gpiochip_node(dev, child) + count++; + + return count; +} + #endif /* __LINUX_GPIO_DRIVER_H */