Re: [PATCH v6 1/8] MFD: add bindings for STM32 Timers driver

[Rob Herring]

On Fri, Dec 09, 2016 at 03:15:12PM +0100, Benjamin Gaignard wrote:
> Add bindings information for STM32 Timers
> 
> version 6:
> - rename stm32-gtimer to stm32-timers
> - change compatible
> - add description about the IPs
> 
> version 2:
> - rename stm32-mfd-timer to stm32-gptimer
> - only keep one compatible string
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
> ---
>  .../devicetree/bindings/mfd/stm32-timers.txt       | 46 ++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/stm32-timers.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/stm32-timers.txt b/Documentation/devicetree/bindings/mfd/stm32-timers.txt
> new file mode 100644
> index 0000000..b30868e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/stm32-timers.txt
> @@ -0,0 +1,46 @@
> +STM32 Timers driver bindings
> +
> +This IP provides 3 types of timer along with PWM functionality:
> +- advanced-control timers consist of a 16-bit auto-reload counter driven by a programmable
> +  prescaler, break input feature, PWM outputs and complementary PWM ouputs channels.
> +- general-purpose timers consist of a 16-bit or 32-bit auto-reload counter driven by a
> +  programmable prescaler and PWM outputs.
> +- basic timers consist of a 16-bit auto-reload counter driven by a programmable prescaler.
> +
> +Required parameters:
> +- compatible: must be "st,stm32-timers"
> +
> +- reg:			Physical base address and length of the controller's
> +			registers.
> +- clock-names: 		Set to "clk_int".

'clk' is redundant. Also, you don't really need -names when there is 
only one of them.

> +- clocks: 		Phandle to the clock used by the timer module.
> +			For Clk properties, please refer to ../clock/clock-bindings.txt
> +
> +Optional parameters:
> +- resets:		Phandle to the parent reset controller.
> +			See ../reset/st,stm32-rcc.txt
> +
> +Optional subnodes:
> +- pwm:			See ../pwm/pwm-stm32.txt
> +- timer:		See ../iio/timer/stm32-timer-trigger.txt
> +
> +Example:
> +	timers@40010000 {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		compatible = "st,stm32-timers";
> +		reg = <0x40010000 0x400>;
> +		clocks = <&rcc 0 160>;
> +		clock-names = "clk_int";
> +
> +		pwm {
> +			compatible = "st,stm32-pwm";
> +			pinctrl-0	= <&pwm1_pins>;
> +			pinctrl-names	= "default";
> +		};
> +
> +		timer {
> +			compatible = "st,stm32-timer-trigger";
> +			reg = <0>;

You don't need reg here as there is only one. In turn, you don't need 
#address-cells or #size-cells.

> +		};
> +	};
> -- 
> 1.9.1
>