From patchwork Thu Aug 7 23:01:53 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tuomas Tynkkynen X-Patchwork-Id: 4693041 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A770F9F402 for ; Thu, 7 Aug 2014 23:05:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AED6F201C0 for ; Thu, 7 Aug 2014 23:05:34 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 11B522018A for ; Thu, 7 Aug 2014 23:05:33 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XFWhh-0002dc-21; Thu, 07 Aug 2014 23:02:37 +0000 Received: from hqemgate15.nvidia.com ([216.228.121.64]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XFWha-0002ZK-Ux for linux-arm-kernel@lists.infradead.org; Thu, 07 Aug 2014 23:02:31 +0000 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com id ; Thu, 07 Aug 2014 16:02:01 -0700 Received: from hqemhub03.nvidia.com ([172.20.12.94]) by hqnvupgp07.nvidia.com (PGP Universal service); Thu, 07 Aug 2014 15:49:14 -0700 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Thu, 07 Aug 2014 15:49:14 -0700 Received: from ttynkkynen-lnx.Nvidia.com (172.20.144.16) by hqemhub03.nvidia.com (172.20.150.15) with Microsoft SMTP Server id 8.3.342.0; Thu, 7 Aug 2014 16:02:07 -0700 From: Tuomas Tynkkynen To: Grant Likely , Rob Herring Subject: [PATCH 1/3] of: Add of_match_machine helper Date: Fri, 8 Aug 2014 02:01:53 +0300 Message-ID: <1407452515-2390-2-git-send-email-ttynkkynen@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1407452515-2390-1-git-send-email-ttynkkynen@nvidia.com> References: <1407452515-2390-1-git-send-email-ttynkkynen@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140807_160231_006196_D900CDF4 X-CRM114-Status: GOOD ( 13.50 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, Daniel Lezcano , linux-pm@vger.kernel.org, Stephen Warren , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Thierry Reding , Tuomas Tynkkynen , linux-tegra@vger.kernel.org, Lorenzo Pieralisi , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add of_match_machine function to test the device tree root for an of_match array. This can be useful when testing SoC versions at runtime, for example. Signed-off-by: Tuomas Tynkkynen Acked-by: Rob Herring --- drivers/of/base.c | 21 +++++++++++++++++++++ include/linux/of.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/drivers/of/base.c b/drivers/of/base.c index d8574ad..37798ea 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -977,6 +977,27 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from, EXPORT_SYMBOL(of_find_matching_node_and_match); /** + * of_match_machine - Tell if root of device tree has a matching of_match struct + * @matches: array of of device match structures to search in + * + * Returns the result of of_match_node for the root node. + */ +const struct of_device_id *of_match_machine(const struct of_device_id *matches) +{ + const struct of_device_id *match; + struct device_node *root; + + root = of_find_node_by_path("/"); + if (!root) + return NULL; + + match = of_match_node(matches, root); + of_node_put(root); + return match; +} +EXPORT_SYMBOL(of_match_machine); + +/** * of_modalias_node - Lookup appropriate modalias for a device node * @node: pointer to a device tree node * @modalias: Pointer to buffer that modalias value will be copied into diff --git a/include/linux/of.h b/include/linux/of.h index 6c4363b..b7a8817 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -289,6 +289,8 @@ extern int of_n_addr_cells(struct device_node *np); extern int of_n_size_cells(struct device_node *np); extern const struct of_device_id *of_match_node( const struct of_device_id *matches, const struct device_node *node); +extern const struct of_device_id *of_match_machine( + const struct of_device_id *matches); extern int of_modalias_node(struct device_node *node, char *modalias, int len); extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); extern struct device_node *of_parse_phandle(const struct device_node *np, @@ -584,6 +586,7 @@ static inline const char *of_prop_next_string(struct property *prop, #define of_match_ptr(_ptr) NULL #define of_match_node(_matches, _node) NULL +#define of_match_machine(_matches) NULL #endif /* CONFIG_OF */ #if defined(CONFIG_OF) && defined(CONFIG_NUMA)