[PATCH] fixup! cpufreq: SPEAr: Add CPUFreq driver

Viresh Kumar viresh.kumar at linaro.org
Tue Nov 27 07:31:39 EST 2012


Signed-off-by: Viresh Kumar <viresh.kumar at linaro.org>
---
Hi Rafael,

To make review easier and faster, i am sending incremental patch for SPEAr
cpufreq driver. This patch was earlier discussed here:

http://lists.infradead.org/pipermail/linux-arm-kernel/2012-November/135088.html

 .../devicetree/bindings/cpufreq/cpufreq-spear.txt  | 33 +++++++++++++++-------
 drivers/cpufreq/spear-cpufreq.c                    |  4 +--
 2 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt
index 4cf2819..f3d44984 100644
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt
@@ -6,7 +6,6 @@ It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) systems
 which share clock across all CPUs.
 
 Required properties:
-- compatible: "st,cpufreq-spear"
 - cpufreq_tbl: Table of frequencies CPU could be transitioned into, in the
   increasing order.
 
@@ -14,16 +13,30 @@ Optional properties:
 - clock-latency: Specify the possible maximum transition latency for clock, in
   unit of nanoseconds.
 
+Both required and optional properties listed above must be defined under node
+/cpus/cpu at 0.
+
 Examples:
 --------
+cpus {
+
+	<...>
+
+	cpu at 0 {
+		compatible = "arm,cortex-a9";
+		reg = <0>;
+
+		<...>
+
+		cpufreq_tbl = < 166000
+				200000
+				250000
+				300000
+				400000
+				500000
+				600000 >;
+	};
+
+	<...>
 
-cpufreq {
-	compatible = "st,cpufreq-spear";
-	cpufreq_tbl = < 166000
-			200000
-			250000
-			300000
-			400000
-			500000
-			600000 >;
 };
diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index a7fe880..4575cfe 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -224,9 +224,9 @@ static int spear_cpufreq_driver_init(void)
 	const __be32 *val;
 	int cnt, i, ret;
 
-	np = of_find_compatible_node(NULL, NULL, "st,cpufreq-spear");
+	np = of_find_node_by_path("/cpus/cpu at 0");
 	if (!np) {
-		pr_err("No cpufreq node found");
+		pr_err("No cpu node found");
 		return -ENODEV;
 	}
 
-- 
1.7.12.rc2.18.g61b472e




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