commit 5553f9e (cpufreq: instantiate cpufreq-cpu0 as a platform_driver)
now forces platform device to be registered for allowing cpufreq-cpu0
to be used by SoCs. example: drivers/cpufreq/highbank-cpufreq.c
However, for SoCs that wish to link up using device tree, instead
of platform device, provide compatibility string match:
compatible = "cpufreq,cpu0";
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: cpufreq@xxxxxxxxxxxxxxx
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: linux-omap@xxxxxxxxxxxxxxx
Signed-off-by: Nishanth Menon <nm@xxxxxx>
---
.../devicetree/bindings/cpufreq/cpufreq-cpu0.txt | 3 +++
drivers/cpufreq/cpufreq-cpu0.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt
index f180963..a5699f0 100644
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt
@@ -10,6 +10,8 @@ under node /cpus/cpu@0.
Required properties:
- operating-points: Refer to Documentation/devicetree/bindings/power/opp.txt
for details
+- compatible: if platform_device is *not* used, should be:
+ "cpufreq,cpu0"
Optional properties:
- clock-name: If the clock is not converted to device tree, then describe
@@ -24,6 +26,7 @@ Examples:
cpus {
#address-cells = <1>;
#size-cells = <0>;
+ compatible = "cpufreq,cpu0";
cpu@0 {
compatible = "arm,cortex-a9";
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index 28223c9..a6f0a9b 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -277,9 +277,15 @@ static int cpu0_cpufreq_remove(struct platform_device *pdev)
return 0;
}
+static struct of_device_id of_cpu0_cpufreq_match[] = {
+ { .compatible = "cpufreq,cpu0", },
+ { /* end */ }
+};
+
static struct platform_driver cpu0_cpufreq_platdrv = {
.driver = {
.name = "cpufreq-cpu0",
+ .of_match_table = of_cpu0_cpufreq_match,
.owner = THIS_MODULE,
},
.probe = cpu0_cpufreq_probe,
--
1.7.9.5
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