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From: Viresh Kumar <viresh.kumar@linaro.org>
To: rjw@rjwysocki.net, shawn.guo@linaro.org
Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, arvind.chauhan@arm.com,
	sboyd@codeaurora.org, linux-arm-msm@vger.kernel.org,
	spk.linux@gmail.com, thomas.ab@samsung.com, nm@ti.com,
	t.figa@samsung.com, Viresh Kumar <viresh.kumar@linaro.org>,
	Rob Herring <rob.herring@linaro.org>,
	devicetree@vger.kernel.org
Subject: [PATCH 01/14] of: Create of_property_match()
Date: Tue,  1 Jul 2014 22:02:30 +0530	[thread overview]
Message-ID: <9a6bdfa64092dd8ee483570880225e08fcbad810.1404231535.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1404231535.git.viresh.kumar@linaro.org>
In-Reply-To: <cover.1404231535.git.viresh.kumar@linaro.org>

Create a new routine of_property_match() that will match a property between two
nodes. If they are exactly same, it returns 1 else 0. If the property isn't
available in any of the nodes or the API isn't implemented, proper error codes
would be returned.

The first user of this routine would be cpufreq-cpu0 driver, which requires to
match "clock" property between CPU nodes to identify which CPUs share clock
line. And hence this routine.

Cc: Rob Herring <rob.herring@linaro.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/of/base.c  | 29 +++++++++++++++++++++++++++++
 include/linux/of.h | 10 ++++++++++
 2 files changed, 39 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b986480..a036c91 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1490,6 +1490,35 @@ int of_property_count_strings(struct device_node *np, const char *propname)
 }
 EXPORT_SYMBOL_GPL(of_property_count_strings);
 
+/**
+ * of_property_match - Match 'prop' property between two nodes
+ * @np1, np2: Nodes to match for property
+ * @prop_name: property to match
+ *
+ * Returns 1 on match, 0 on no match, and error for missing property.
+ */
+int of_property_match(const struct device_node *np1,
+		      const struct device_node *np2, const char *prop_name)
+{
+	const __be32 *prop1, *prop2;
+	int size1, size2;
+
+	/* Retrieve property from both nodes */
+	prop1 = of_get_property(np1, prop_name, &size1);
+	if (!prop1)
+		return -ENOENT;
+
+	prop2 = of_get_property(np2, prop_name, &size2);
+	if (!prop2)
+		return -ENOENT;
+
+	if (size1 != size2)
+		return 0;
+
+	return !memcmp(prop1, prop2, size1);
+}
+EXPORT_SYMBOL_GPL(of_property_match);
+
 void of_print_phandle_args(const char *msg, const struct of_phandle_args *args)
 {
 	int i;
diff --git a/include/linux/of.h b/include/linux/of.h
index 196b34c..4e9cf5a 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -275,6 +275,9 @@ extern int of_property_match_string(struct device_node *np,
 				    const char *string);
 extern int of_property_count_strings(struct device_node *np,
 				     const char *propname);
+extern int of_property_match(const struct device_node *np1,
+			     const struct device_node *np2,
+			     const char *prop_name);
 extern int of_device_is_compatible(const struct device_node *device,
 				   const char *);
 extern int of_device_is_available(const struct device_node *device);
@@ -498,6 +501,13 @@ static inline int of_property_count_strings(struct device_node *np,
 	return -ENOSYS;
 }
 
+static inline int of_property_match(const struct device_node *np1,
+				    const struct device_node *np2,
+				    const char *prop_name)
+{
+	return -ENOSYS;
+}
+
 static inline const void *of_get_property(const struct device_node *node,
 				const char *name,
 				int *lenp)
-- 
2.0.0.rc2

  reply	other threads:[~2014-07-01 16:32 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-01 16:32 [PATCH 00/14] cpufreq: cpu0: Extend support beyond CPU0, V2 Viresh Kumar
2014-07-01 16:32 ` Viresh Kumar [this message]
2014-07-01 16:32 ` [PATCH 02/14] clk: Create of_clk_shared_by_cpus() Viresh Kumar
2014-07-01 18:00   ` Stephen Boyd
2014-07-02  1:57     ` Viresh Kumar
2014-07-09 14:38   ` Santosh Shilimkar
2014-07-09 14:38     ` Santosh Shilimkar
2014-07-09 15:20     ` Viresh Kumar
     [not found]   ` <5f7164d789e87c62d722b575980c92dfd0504334.1404231535.git.viresh.kumar@linar o.org>
2014-07-28 14:01     ` Grant Likely
2014-07-28 14:01       ` Grant Likely
2014-07-01 16:32 ` [PATCH 03/14] cpufreq: Add support for per-policy driver data Viresh Kumar
2014-07-09 14:33   ` Santosh Shilimkar
2014-07-09 14:33     ` Santosh Shilimkar
2014-07-09 15:07     ` Viresh Kumar
2014-07-01 16:32 ` [PATCH 04/14] cpufreq: cpu0: Add Module Author Viresh Kumar
2014-07-09 14:42   ` Santosh Shilimkar
2014-07-09 14:42     ` Santosh Shilimkar
2014-07-09 15:08     ` Viresh Kumar
2014-07-09 15:24       ` Santosh Shilimkar
2014-07-01 16:32 ` [PATCH 05/14] cpufreq: cpu0: don't validate clock on clk_put() Viresh Kumar
2014-07-09 14:42   ` Santosh Shilimkar
2014-07-09 14:42     ` Santosh Shilimkar
2014-07-01 16:32 ` [PATCH 06/14] cpufreq: cpu0: defer probe if clock isn't registered yet Viresh Kumar
2014-07-02  5:53   ` Shawn Guo
2014-07-02  5:53     ` Shawn Guo
2014-07-02  5:55     ` Viresh Kumar
2014-07-02 11:32       ` Viresh Kumar
2014-07-03  0:38         ` Stephen Boyd
2014-07-03  2:19           ` Viresh Kumar
2014-07-09 14:43             ` Santosh Shilimkar
2014-07-09 14:43               ` Santosh Shilimkar
2014-07-01 16:32 ` [PATCH 07/14] cpufreq: cpu0: OPPs can be populated at runtime Viresh Kumar
2014-07-01 18:02   ` Stephen Boyd
2014-07-02  2:03     ` Viresh Kumar
2014-07-02  4:03   ` [PATCH V2 Resend " Viresh Kumar
2014-07-09 14:44   ` [PATCH " Santosh Shilimkar
2014-07-09 14:44     ` Santosh Shilimkar
2014-07-09 15:09     ` Viresh Kumar
2014-07-10 11:19     ` Viresh Kumar
2014-07-10 12:39       ` Nishanth Menon
2014-07-10 13:31         ` Santosh Shilimkar
2014-07-10 13:36           ` Viresh Kumar
2014-07-01 16:32 ` [PATCH 08/14] cpufreq: cpu0: use dev_{err|warn|dbg} instead of pr_{err|warn|debug} Viresh Kumar
2014-07-09 14:45   ` Santosh Shilimkar
2014-07-09 14:45     ` Santosh Shilimkar
2014-07-01 16:32 ` [PATCH 09/14] cpufreq: cpu0: Move per-cluster initialization code to ->init() Viresh Kumar
2014-07-03  0:43   ` Stephen Boyd
2014-07-03  2:11     ` Viresh Kumar
2014-07-09 14:53   ` Santosh Shilimkar
2014-07-09 14:53     ` Santosh Shilimkar
2014-07-09 15:17     ` Viresh Kumar
2014-07-09 15:26       ` Santosh Shilimkar
2014-07-09 15:27         ` Viresh Kumar
2014-07-09 15:29           ` Santosh Shilimkar
2014-07-09 15:33             ` Viresh Kumar
2014-07-01 16:32 ` [PATCH 10/14] cpufreq: cpu0: try regulators with name "cpu-supply" Viresh Kumar
2014-07-01 16:32 ` [PATCH 11/14] cpufreq: cpu0: Make allocate_resources() work for any CPU Viresh Kumar
2014-07-01 16:32 ` [PATCH 12/14] cpufreq: cpu0: Extend support beyond CPU0 Viresh Kumar
2014-07-02  4:03   ` [PATCH V2 Resend " Viresh Kumar
2014-07-01 16:32 ` [PATCH 13/14] cpufreq: cpu0: rename driver and internals to 'cpufreq_generic' Viresh Kumar
2014-07-01 16:32 ` [PATCH 14/14] cpufreq: generic: set platform_{driver|device} '.name' to 'cpufreq-generic' Viresh Kumar
2014-07-02  4:12 ` [PATCH 00/14] cpufreq: cpu0: Extend support beyond CPU0, V2 Viresh Kumar
2014-07-03  1:24   ` Stephen Boyd
2014-07-03  2:44     ` Viresh Kumar
2014-07-03 22:16       ` Mike Turquette
2014-07-04  4:21         ` Viresh Kumar
2014-07-08  4:50           ` Viresh Kumar
2014-07-09 17:41             ` Stephen Boyd
2014-07-16 16:01             ` Viresh Kumar
2014-07-16 17:28               ` Thomas Petazzoni
2014-07-16 21:17                 ` Rafael J. Wysocki
2014-07-16 21:18               ` Rafael J. Wysocki
2014-07-17  0:28                 ` Viresh Kumar
2014-07-17  7:35                   ` Thomas Petazzoni
2014-07-17  7:41                     ` Viresh Kumar
2014-07-18  1:02                       ` Rafael J. Wysocki
2014-07-18  4:17                         ` Viresh Kumar
     [not found]                           ` <CAKohpomKzK8pMJs1gv+uXxhd17HtCQyfjSnVYw9KpGz6FwbgDA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-07-24 10:48                             ` Viresh Kumar
2014-07-24 10:48                               ` Viresh Kumar
2014-07-25 14:29                               ` Rob Herring
     [not found]                                 ` <CAL_JsqKqCeU0zs+rS1vxsOeh=Kuw_-gaVHtGU76Lb6TchCTytw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-07-25 14:34                                   ` Viresh Kumar
2014-07-25 14:34                                     ` Viresh Kumar
2014-07-25 15:41                                 ` Thomas Petazzoni

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