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: 12795958 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 31235C4321E for ; Wed, 30 Mar 2022 14:50:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347324AbiC3OwK (ORCPT ); Wed, 30 Mar 2022 10:52:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347326AbiC3OwG (ORCPT ); Wed, 30 Mar 2022 10:52:06 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6741F4925E; Wed, 30 Mar 2022 07:50:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648651820; x=1680187820; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DFJ8vSWxdkQP5rCMWcqpqf0iMOqCrH1H7hLKYmjSIpU=; b=KT9uA43Quj97EQsS/34LBJUiti+KKxG2KtmHKYDBQQTFBKMuoufIYN5v HtX6K5xbKXegXJRtw4sooRh+8smFbfi1OYejjkcjgYbnK2smTVObdzCfS eKBYlhmNR6hRTg9OPs+HZWNyPWon3zuvKWr+Tv1z8laLZxQwjTTz1jKig /D+8uzVX5hwSNmehuWdaW3mwpunjWkQr2xaExA5XJDc9IV9Mh9CBNGKXe C2VqlsoA2cUN2nVWOgtFY4++TsKQUOBbi+q1Sd793ATzdgDS2QCqiK0/V kZ3cGJRoAFSzSNH67yIOE3LTU/jr0gjCPXqsj2b3PvtZPMGj3/5k8wEZf w==; X-IronPort-AV: E=McAfee;i="6200,9189,10301"; a="257139573" X-IronPort-AV: E=Sophos;i="5.90,222,1643702400"; d="scan'208";a="257139573" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2022 07:50:19 -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 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 | 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 */