From patchwork Mon Nov 6 07:31:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13446402 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 CE102C4332F for ; Mon, 6 Nov 2023 07:40:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=TcDuWNUOIOuer0lFNntQz5JyHyJ7HSMb+ZtixsDlkh8=; b=NRZPphH4zqwPWgmq3AT1umGGIQ 05NrfIy+Xoxek3+TC2CE8H+B03z3R1XQjvO4jhOIUSNOS1PScnvp43TsnnmHeaFDftAjvgeO+/3/d laqCjRKDZyDLrhoVKTe11C7cHKfjeZdkG4mT/d4/EL7f12RGwgBaVmqvL26F2suJoimuayAWsI2cW cpQHzjfmJG1SpWReSzZRyGTb85cf3pb8aUXQgZwBHycAg7kAEftSfBrqmGV0oIOOhdDw21Yc6KsfX n32iD3etbQFWwvlS+d7Ehp29dtWaw+C/NO+6WsfAm1B1+zKYeCL7EjEo8IUHGgoIlm9ccvSUr1a6S josGWNPA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qzuEB-00G1Tm-19; Mon, 06 Nov 2023 07:40:55 +0000 Received: from mgamail.intel.com ([192.55.52.93]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qzuE8-00G1Rp-0r for linux-mediatek@lists.infradead.org; Mon, 06 Nov 2023 07:40:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699256452; x=1730792452; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=pCrnP5rHZmj4ISuVRVw65rZpqm5s3mY61ftuGZidaTY=; b=bKhrh2kp3qLkwIUwt2I7TUOvQclm+zJjA0uMKe9/UeXVxTpYWTS+MCpz u765SBBxIZgY5geShumSY0CLWvr0k4bYDWYtRzM7jCNLw95f/V7A2g+3I 3f3UNaP7VeJD3gl/mU2vH+IVBL2fk+9jQ4nr95CnJqTAzybU7FqHfxh3S MM60TNQqTOI37Bl2Ct43CrLOMqUAAtVIkeHNFa5a+Gkekdbnx4u1DSy6u zTHWwa9gxpmrYbtX+SfW5ZpO/M6mi1pF50h0kQ0Q7gYLltwq1TcWSWRWx K9tpZsZxP4AM7rDJq1KaLdwIYwmtj7JWdFCHLZVtuD1LS9318yPlkEUMw g==; X-IronPort-AV: E=McAfee;i="6600,9927,10885"; a="386398688" X-IronPort-AV: E=Sophos;i="6.03,280,1694761200"; d="scan'208";a="386398688" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2023 23:40:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10885"; a="797229586" X-IronPort-AV: E=Sophos;i="6.03,280,1694761200"; d="scan'208";a="797229586" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2023 23:40:34 -0800 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 429AA11F724; Mon, 6 Nov 2023 09:31:45 +0200 (EET) From: Sakari Ailus To: linux-acpi@vger.kernel.org, Greg Kroah-Hartman Cc: Laurent Pinchart , Andy Shevchenko , linux-media@vger.kernel.org, Paul Elder , Hans Verkuil , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Julien Stephan , devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, rafael@kernel.org Subject: [RESEND PATCH v4 1/1] device property: Add fwnode_name_eq() Date: Mon, 6 Nov 2023 09:31:41 +0200 Message-Id: <20231106073141.1250344-1-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231105_234052_319673_EF444C14 X-CRM114-Status: GOOD ( 13.17 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add fwnode_name_eq() to implement the functionality of of_node_name_eq() on fwnode property API. The same convention of ending the comparison at '@' (besides NUL) is applied on also both ACPI and swnode. The function is intended for comparing unit address-less node names on DT and firmware or swnodes compliant with DT bindings. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Tested-by: Laurent Pinchart Acked-by: Rafael J. Wysocki Acked-by: Greg Kroah-Hartman --- Hi Greg, Could we merge this via the media tree? Another patch (or rather a future version of it) there would need it: . since v3: - Use ptrdiff_t type for len. drivers/base/property.c | 28 ++++++++++++++++++++++++++++ include/linux/property.h | 1 + 2 files changed, 29 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index 8667b13639d2..f20379c9a5c9 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -595,6 +595,34 @@ const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode) return fwnode_call_ptr_op(fwnode, get_name_prefix); } +/** + * fwnode_name_eq - Return true if node name is equal + * @fwnode: The firmware node + * @name: The name to which to compare the node name + * + * Compare the name provided as an argument to the name of the node, stopping + * the comparison at either NUL or '@' character, whichever comes first. This + * function is generally used for comparing node names while ignoring the + * possible unit address of the node. + * + * Return: true if the node name matches with the name provided in the @name + * argument, false otherwise. + */ +bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name) +{ + const char *node_name; + ptrdiff_t len; + + node_name = fwnode_get_name(fwnode); + if (!node_name) + return false; + + len = strchrnul(node_name, '@') - node_name; + + return str_has_prefix(node_name, name) == len; +} +EXPORT_SYMBOL_GPL(fwnode_name_eq); + /** * fwnode_get_parent - Return parent firwmare node * @fwnode: Firmware whose parent is retrieved diff --git a/include/linux/property.h b/include/linux/property.h index 083a1f41364b..096ade186601 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -108,6 +108,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, const char *fwnode_get_name(const struct fwnode_handle *fwnode); const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); +bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name); struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);