From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A66FC3A5A8 for ; Mon, 2 Sep 2019 08:33:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5AAF2190F for ; Mon, 2 Sep 2019 08:33:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730446AbfIBIcz (ORCPT ); Mon, 2 Sep 2019 04:32:55 -0400 Received: from mga18.intel.com ([134.134.136.126]:28816 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730487AbfIBIcq (ORCPT ); Mon, 2 Sep 2019 04:32:46 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Sep 2019 01:32:42 -0700 X-IronPort-AV: E=Sophos;i="5.64,457,1559545200"; d="scan'208";a="198542431" Received: from paasikivi.fi.intel.com ([10.237.72.42]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Sep 2019 01:32:40 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by paasikivi.fi.intel.com (Postfix) with ESMTP id 3064621055; Mon, 2 Sep 2019 11:32:34 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.92) (envelope-from ) id 1i4hlQ-0005Jt-Jl; Mon, 02 Sep 2019 11:32:40 +0300 From: Sakari Ailus To: Petr Mladek , linux-kernel@vger.kernel.org, rafael@kernel.org Cc: Andy Shevchenko , linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring , Heikki Krogerus Subject: [PATCH v4 10/11] lib/vsprintf: Add %pfw conversion specifier for printing fwnode names Date: Mon, 2 Sep 2019 11:32:39 +0300 Message-Id: <20190902083240.20367-11-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190902083240.20367-1-sakari.ailus@linux.intel.com> References: <20190902083240.20367-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Add support for %pfw conversion specifier (with "f" and "P" modifiers) to support printing full path of the node, including its name ("f") and only the node's name ("P") in the printk family of functions. The two flags have equivalent functionality to existing %pOF with the same two modifiers ("f" and "P") on OF based systems. The ability to do the same on ACPI based systems is added by this patch. On ACPI based systems the resulting strings look like \_SB.PCI0.CIO2.port@1.endpoint@0 where the nodes are separated by a dot (".") and the first three are ACPI device nodes and the latter two ACPI data nodes. Signed-off-by: Sakari Ailus Reviewed-by: Andy Shevchenko --- Documentation/core-api/printk-formats.rst | 24 +++++++++++++++ lib/vsprintf.c | 36 +++++++++++++++++++++++ scripts/checkpatch.pl | 3 +- 3 files changed, 62 insertions(+), 1 deletion(-) diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 922a29eb70e6c..abba210f67567 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -418,6 +418,30 @@ Examples:: Passed by reference. +Fwnode handles +-------------- + +:: + + %pfw[fP] + +For printing information on fwnode handles. The default is to print the full +node name, including the path. The modifiers are functionally equivalent to +%pOF above. + + - f - full name of the node, including the path + - P - the name of the node including an address (if there is one) + +Examples (ACPI): + + %pfwf \_SB.PCI0.CIO2.port@1.endpoint@0 - Full node name + %pfwP endpoint@0 - Node name + +Examples (OF): + + %pfwf /ocp@68000000/i2c@48072000/camera@10/port/endpoint - Full name + %pfwP endpoint - Node name + Time and date (struct rtc_time) ------------------------------- diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 4ad9332d54ba6..b9b4c835db063 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1981,6 +1981,36 @@ char *device_node_string(char *buf, char *end, struct device_node *dn, return widen_string(buf, buf - buf_start, end, spec); } +static noinline_for_stack +char *fwnode_string(char *buf, char *end, struct fwnode_handle *fwnode, + struct printf_spec spec, const char *fmt) +{ + struct printf_spec str_spec = spec; + char *buf_start = buf; + + str_spec.field_width = -1; + + if (*fmt != 'w') + return error_string(buf, end, "(%pfw?)", spec); + + if (check_pointer(&buf, end, fwnode, spec)) + return buf; + + fmt++; + + switch (*fmt) { + case 'f': /* full_name */ + default: + buf = fwnode_full_name_string(fwnode, buf, end); + break; + case 'P': /* name */ + buf = string(buf, end, fwnode_get_name(fwnode), str_spec); + break; + } + + return widen_string(buf, buf - buf_start, end, spec); +} + /* * Show a '%p' thing. A kernel extension is that the '%p' is followed * by an extra set of alphanumeric characters that are extended format @@ -2083,6 +2113,10 @@ char *device_node_string(char *buf, char *end, struct device_node *dn, * F device node flags * c major compatible string * C full compatible string + * - 'fw[fP]' For a firmware node (struct fwnode_handle) pointer + * Without an option prints the full name of the node + * f full name + * P node name, including a possible unit address * - 'x' For printing the address. Equivalent to "%lx". * * ** When making changes please also update: @@ -2160,6 +2194,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, return flags_string(buf, end, ptr, spec, fmt); case 'O': return device_node_string(buf, end, ptr, spec, fmt + 1); + case 'f': + return fwnode_string(buf, end, ptr, spec, fmt + 1); case 'x': return pointer_string(buf, end, ptr, spec); } diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index a60c241112cd4..8df50911ff4e9 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5995,7 +5995,8 @@ sub process { while ($fmt =~ /(\%[\*\d\.]*p(\w))/g) { $specifier = $1; $extension = $2; - if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxt]/) { + if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxtf]/ || + $extension =~ /^f[^w]/) { $bad_specifier = $specifier; last; } -- 2.20.1