dt-bindings: pwm-stm32: Document pinctrl sleep state

Add documentation for pinctrl sleep state that can be used by STM32
timers PWM.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
index a8690bf..f1620c1 100644 (file)
--- a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
@@ -5,8 +5,9 @@ See ../mfd/stm32-timers.txt for details about the parent node.
 
 Required parameters:
 - compatible:          Must be "st,stm32-pwm".
-- pinctrl-names:       Set to "default".
-- pinctrl-0:           List of phandles pointing to pin configuration nodes for PWM module.
+- pinctrl-names:       Set to "default". An additional "sleep" state can be
+                       defined to set pins in sleep state when in low power.
+- pinctrl-n:           List of phandles pointing to pin configuration nodes for PWM module.
                        For Pinctrl properties see ../pinctrl/pinctrl-bindings.txt
 - #pwm-cells:          Should be set to 3. This PWM chip uses the default 3 cells
                        bindings defined in pwm.txt.
@@ -32,7 +33,8 @@ Example:
                        compatible = "st,stm32-pwm";
                        #pwm-cells = <3>;
                        pinctrl-0       = <&pwm1_pins>;
-                       pinctrl-names   = "default";
+                       pinctrl-1       = <&pwm1_sleep_pins>;
+                       pinctrl-names   = "default", "sleep";
                        st,breakinput = <0 1 5>;
                };
        };