Add documentation for STMicroelectronics STM32 Low-Power Timer
PWM binding.

Signed-off-by: Fabrice Gasnier <[email protected]>
---
Changes in v2:
- s/Low Power/Low-Power/
- remove 0x in example (parent node)
- improve properties description
---
 .../devicetree/bindings/pwm/pwm-stm32-lp.txt       | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt 
b/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt
new file mode 100644
index 0000000..941c990
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt
@@ -0,0 +1,24 @@
+STMicroelectronics STM32 Low-Power Timer PWM
+
+STM32 Low-Power Timer provides single channel PWM.
+
+Must be a sub-node of an STM32 Low-Power Timer device tree node.
+See ../mfd/stm32-lptimer.txt for details about the parent node.
+
+Required parameters:
+- compatible:          Must be "st,stm32-pwm-lp".
+
+Optional properties:
+- pinctrl-names:       Set to "default".
+- pinctrl-0:           Phandle pointing to pin configuration node for PWM.
+
+Example:
+       lptimer1: lptimer@40002400 {
+               compatible = "st,stm32-lptimer";
+               ...
+               pwm {
+                       compatible = "st,stm32-pwm-lp";
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&lppwm1_pins>;
+               };
+       };
-- 
1.9.1

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