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: 742095 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A9DA82F47; Mon, 6 Nov 2023 07:40:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Z4Ln4jBq" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B692AF; Sun, 5 Nov 2023 23:40:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699256439; x=1730792439; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=pCrnP5rHZmj4ISuVRVw65rZpqm5s3mY61ftuGZidaTY=; b=Z4Ln4jBqcvYUYqMusg7Fm1lqgxPBg6n5K8CrEMG5BpXfxrOb+pk2nDdq 52J3OO8yO71zrgxmL+M96+jqhXut5LRXrfwY4Vjju+wKbwcu6QgTcDQn3 Stj9tGcbg5h5lH/fBwHMtVITaR60lWyAo8ppMcD0DZGo4OqlGBkhnMHWu wKTO53S8+Cvt4e4agsK+o2XiNYl63yy/ueFkKapEMsT5lclQHt9Bavogt xlFEF37H3V5mNWP6Zx46xheWT+Al7D3I/nfZnLtrDk6Nru15+aN199T90 IJzD643szIIDV/r/Xm51e08ETenv6c4d7LjXAyzI97dCV03AbDtVOSsnQ w==; X-IronPort-AV: E=McAfee;i="6600,9927,10885"; a="386398682" X-IronPort-AV: E=Sophos;i="6.03,280,1694761200"; d="scan'208";a="386398682" 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 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 --- 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);