[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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