From patchwork Fri Apr 1 10:35:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12798094 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 CE845C433EF for ; Fri, 1 Apr 2022 10:36:19 +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=9lv4tYAUTi9/ZWLK+whUMn2L6ox+Q5WMU7ps7p8x9zg=; b=lfjJ4M/LNWtmzR H0S100mK5rtQp5RizBdg4xYDtNh3+PMmswdXtcbUl0QB642t58yYlkGeqcGDFi+6X7va43bMuIUex 7aon0iFHq9DihVR/B5PV2mrYHen46k5+YEKnFj5VFdpZ2/bbcHqKTn9UjTBms/0zpXgLvJyOg/SjI FDIhVivym1B+X5ETIPGP7Opkt+GWGz6PNnOkyIsbQlJunblK5AT+iYnVAZxQ3j38MeoNpdy+CMQ1D VgzH/bMuAJ93Yw0aKolyLBf5MWrwDp54ZHFkrOiPY1cqEejSlBjsu7SLlfRD4wUsyBkKXTpHho69Y UFtB5G9ujXY0dZJ9WwvA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1naEdc-005CpC-66; Fri, 01 Apr 2022 10:36:16 +0000 Received: from mga05.intel.com ([192.55.52.43]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1naEdH-005Cfq-BS; Fri, 01 Apr 2022 10:35:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648809355; x=1680345355; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=LT/CSy5JpaWUNE3hS0zZPYlM1WwfMM5j7JNnfmfMtD8=; b=nO2tscEMF8CEoN8z0O8abPAeXSZg9QBdwKX0nZ+1IDDyBdIjth5/OhLo eO9MQ+NNlC7je78aUpc+Zgp/8S2U11arzqzzqZrKN35wegV6/gJ9NlchA gXKKsX+AeQRZX+zKStL/nhRQUS1Fgg76p0Ws80q7YeQ31JReu3Zt5XYs7 9HfIM3MOFTKCebxegRtZ8JZyAICxLbbMdbUisC3oCngJBScg2lbdDOzh8 N6CVLTXEXnZw6X6BRE+k9PRxbNVDAngeP1WLpdz1fpcMDuB87A3lVOoop Sulfq7CBl8D1sNwjlj8t03m7sB//dEY1kHZkQib47422kyqTz9R7aq7oV Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10303"; a="346541345" X-IronPort-AV: E=Sophos;i="5.90,227,1643702400"; d="scan'208";a="346541345" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Apr 2022 03:35:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,227,1643702400"; d="scan'208";a="843133146" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga005.fm.intel.com with ESMTP; 01 Apr 2022 03:35:44 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id AC82A1C3; Fri, 1 Apr 2022 13:36:05 +0300 (EEST) From: Andy Shevchenko To: Qianggui Song , Andy Shevchenko , Geert Uytterhoeven , Krzysztof Kozlowski , Marc Zyngier , 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 v4 02/13] gpiolib: Introduce gpiochip_node_count() helper Date: Fri, 1 Apr 2022 13:35:53 +0300 Message-Id: <20220401103604.8705-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220401103604.8705-1-andriy.shevchenko@linux.intel.com> References: <20220401103604.8705-1-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-20220401_033555_446546_7D4FC865 X-CRM114-Status: GOOD ( 10.51 ) 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 Acked-by: Bartosz Golaszewski --- 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 bfc91f122d5f..12de0b22b4ef 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -755,4 +755,15 @@ 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 */