From: Naidu Tellapati <Naidu.Tellapati@xxxxxxxxxx>
Add binding document for IMG Pulse Width Modulator (PWM) DAC present on the
Pistachio SOC. The PWM DAC has four channels.
Signed-off-by: Naidu Tellapati <Naidu.Tellapati@xxxxxxxxxx>
Signed-off-by: Sai Masarapu <Sai.Masarapu@xxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxx>
---
Documentation/devicetree/bindings/pwm/img-pwm.txt | 24 +++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/img-pwm.txt
diff --git a/Documentation/devicetree/bindings/pwm/img-pwm.txt b/Documentation/devicetree/bindings/pwm/img-pwm.txt
new file mode 100644
index 0000000..fade5f2
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/img-pwm.txt
@@ -0,0 +1,24 @@
+*Imagination Technologies PWM DAC driver
+
+Required properties:
+ - compatible: Should be "img,pistachio-pwm"
+ - reg: Should contain physical base address and length of pwm registers.
+ - clocks: Must contain an entry for each entry in clock-names.
+ See ../clock/clock-bindings.txt for details.
+ - clock-names: Must include the following entries.
+ - pwm: PWM operating clock.
+ - sys: PWM system interface clock.
+ - #pwm-cells: Should be 2. See pwm.txt in this directory for the
+ description of the cells format.
+ - img,cr-periph: Must contain a phandle to the peripheral control
+ syscon node which contains PWM control registers.
+
+Example:
+ pwm: pwm@18101300 {
+ compatible = "img,pistachio-pwm";
+ reg = <0x18101300 0x100>;
+ clocks = <&pwm_clk>, <&system_clk>;
+ clock-names = "pwm", "sys";
+ #pwm-cells = <2>;
+ img,cr-periph = <&cr_periph>;
+ };
--
2.2.1
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