linux-kernel - [PATCH 1/5] dt-bindings: pwm-stm32: add #pwm-cells

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Date:   Wed, 19 Jun 2019 11:52:01 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     <thierry.reding@...il.com>, <robh+dt@...nel.org>,
        <alexandre.torgue@...com>
CC:     <mark.rutland@....com>, <linux@...linux.org.uk>,
        <mcoquelin.stm32@...il.com>, <fabrice.gasnier@...com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pwm@...r.kernel.org>,
        <benjamin.gaignard@...com>,
        <linux-stm32@...md-mailman.stormreply.com>
Subject: [PATCH 1/5] dt-bindings: pwm-stm32: add #pwm-cells

STM32 Timers support generic 3 cells PWM bindings to encode PWM number,
period and polarity as defined in pwm.txt.

Fixes: cd9a99c2f8e8 ("dt-bindings: pwm: Add STM32 bindings")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
---
 Documentation/devicetree/bindings/pwm/pwm-stm32.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
index 3e6d550..a8690bf 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
@@ -8,6 +8,8 @@ Required parameters:
 - pinctrl-names: 	Set to "default".
 - pinctrl-0: 		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.
 
 Optional parameters:
 - st,breakinput:	One or two <index level filter> to describe break input configurations.
@@ -28,6 +30,7 @@ Example:
 
 		pwm {
 			compatible = "st,stm32-pwm";
+			#pwm-cells = <3>;
 			pinctrl-0	= <&pwm1_pins>;
 			pinctrl-names	= "default";
 			st,breakinput = <0 1 5>;
-- 
2.7.4