aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/pwm
diff options
context:
space:
mode:
authorBart Tanghe <bart.tanghe@thomasmore.be>2014-10-08 12:14:32 +0200
committerThierry Reding <thierry.reding@gmail.com>2014-11-17 12:20:13 +0100
commite5a06dc5ac1f686d11b11488a88a63ab12e079cb (patch)
tree3a6c350a173bb47522c1ea15b553951392d04dea /Documentation/devicetree/bindings/pwm
parentcac7f2429872d3733dc3f9915857b1691da2eb2f (diff)
pwm: Add BCM2835 PWM driver
Add PWM driver for Broadcom BCM2835 processor (Raspberry Pi) Signed-off-by: Bart Tanghe <bart.tanghe@thomasmore.be> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/pwm')
-rw-r--r--Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt30
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt b/Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt
new file mode 100644
index 000000000000..fb6fb31bc4c4
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt
@@ -0,0 +1,30 @@
+BCM2835 PWM controller (Raspberry Pi controller)
+
+Required properties:
+- compatible: should be "brcm,bcm2835-pwm"
+- reg: physical base address and length of the controller's registers
+- clock: This clock defines the base clock frequency of the PWM hardware
+ system, the period and the duty_cycle of the PWM signal is a multiple of
+ the base period.
+- #pwm-cells: Should be 2. See pwm.txt in this directory for a description of
+ the cells format.
+
+Examples:
+
+pwm@2020c000 {
+ compatible = "brcm,bcm2835-pwm";
+ reg = <0x2020c000 0x28>;
+ clocks = <&clk_pwm>;
+ #pwm-cells = <2>;
+};
+
+clocks {
+ ....
+ clk_pwm: pwm {
+ compatible = "fixed-clock";
+ reg = <3>;
+ #clock-cells = <0>;
+ clock-frequency = <9200000>;
+ };
+ ....
+};

Privacy Policy