[PATCH] bcm2835: Add Raspberry Pi CPU frequency control to the device tree

[Lubomir Rintel]

This adds a device tree binding for Broadcom BCM2834 CPU frequency control
driven via Raspberry Pi VideoCore 4 firmware interface.

Signed-off-by: Lubomir Rintel <lkundrak at v3.sk>
Cc: Stephen Warren <swarren at wwwdotorg.org>
Cc: Lee Jones <lee at kernel.org>
Cc: Eric Anholt <eric at anholt.net>
Cc: linux-rpi-kernel at lists.infradead.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-pm at vger.kernel.org
---
Depends on the RPi Firmware driver submitted on linux-rpi-kernel a while ago. 
Can't see it in arm-soc or linux-next yet though (?). Available in branch 
'rpi-firmware' of https://github.com/anholt/linux

 .../bindings/cpufreq/raspberrypi,bcm2835-cpufreq.txt        | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/cpufreq/raspberrypi,bcm2835-cpufreq.txt

diff --git a/Documentation/devicetree/bindings/cpufreq/raspberrypi,bcm2835-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/raspberrypi,bcm2835-cpufreq.txt
new file mode 100644
index 0000000..eb126d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/raspberrypi,bcm2835-cpufreq.txt
@@ -0,0 +1,13 @@
+Raspberry Pi Broadcom BCM2835 CPU frequency control
+
+Required properties:
+
+- compatible : should be "raspberrypi,bcm2835-cpufreq"
+- firmware : the Raspberry Pi firmware node
+
+Example:
+
+cpufreq {
+        compatible = "raspberrypi,bcm2835-cpufreq";
+        firmware = <&firmware>;
+};
-- 
2.4.3