Hi,

On Thu, Jan 11, 2018 at 07:34:12PM +0800, hao_zhang wrote:
> This patch add pwm node for r40.
> 
> Signed-off-by: hao_zhang <hao5781286@gmail.com>
> ---
>  arch/arm/boot/dts/sun8i-r40.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi b/arch/arm/boot/dts/sun8i-r40.dtsi
> index 173dcc1..84c963c 100644
> --- a/arch/arm/boot/dts/sun8i-r40.dtsi
> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> @@ -295,6 +295,11 @@
>  				bias-pull-up;
>  			};
>  
> +			pwm_pins: pwm-pins {
> +				pins = "PB2", "PB3";
> +				function = "pwm";
> +			};
> +

Is it the only combination of pins that is usable?

If so, you can add the pinctrl-0 property directly in the pwm nodes.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com