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Date: Sun, 27 Nov 2016 14:19:18 +0000 From: Jonathan Cameron <jic23@...nel.org> To: Benjamin Gaignard <benjamin.gaignard@...aro.org>, lee.jones@...aro.org, robh+dt@...nel.org, mark.rutland@....com, alexandre.torgue@...com, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, thierry.reding@...il.com, linux-pwm@...r.kernel.org, knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net, linux-iio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Cc: fabrice.gasnier@...com, gerald.baeza@...com, arnaud.pouliquen@...com, linus.walleij@...aro.org, linaro-kernel@...ts.linaro.org, Benjamin Gaignard <benjamin.gaignard@...com> Subject: Re: [PATCH v2 3/7] PWM: add pwm-stm32 DT bindings On 24/11/16 15:14, Benjamin Gaignard wrote: > Define bindings for pwm-stm32 > > version 2: > - use parameters instead of compatible of handle the hardware configuration > > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com> > --- > .../devicetree/bindings/pwm/pwm-stm32.txt | 37 ++++++++++++++++++++++ > 1 file changed, 37 insertions(+) > create mode 100644 Documentation/devicetree/bindings/pwm/pwm-stm32.txt > > diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt > new file mode 100644 > index 0000000..36263f0 > --- /dev/null > +++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt > @@ -0,0 +1,37 @@ > +STMicroelectronics PWM driver bindings for STM32 > + > +Must be a sub-node of STM32 general purpose timer driver > + > +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. > + For Pinctrl properties, please refer to [1]. > + > +Optional parameters: > +- st,breakinput: Set if the hardware have break input capabilities > +- st,breakinput-polarity: Set break input polarity. Default is 0 > + The value define the active polarity: > + - 0 (active LOW) > + - 1 (active HIGH) > +- st,pwm-num-chan: Number of available PWM channels. Default is 0. > +- st,32bits-counter: Set if the hardware have a 32 bits counter > +- st,complementary: Set if the hardware have complementary output channels > + > +[1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt > + > +Example: > + gptimer1: gptimer1@...10000 { Given the example includes chunks for the other binding, make sure to have explicit cross references in the document. > + compatible = "st,stm32-gptimer"; > + reg = <0x40010000 0x400>; > + clocks = <&rcc 0 160>; > + clock-names = "clk_int"; > + > + pwm1@0 { > + compatible = "st,stm32-pwm"; > + st,pwm-num-chan = <4>; > + st,breakinput; > + st,complementary; > + }; > + }; >
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