linux-kernel - Re: [PATCH] ARM: dts: sun8i-v3s: Add PWM controller and pins definitions

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Message-ID: <20201217163045.i5o5sb4pls4gn52g@gilmour>
Date:   Thu, 17 Dec 2020 17:30:45 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Paul Kocialkowski <contact@...lk.fr>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>
Subject: Re: [PATCH] ARM: dts: sun8i-v3s: Add PWM controller and pins
 definitions

Hi,

On Thu, Dec 17, 2020 at 12:20:31PM +0100, Paul Kocialkowski wrote:
> This introduces definitions for the PWM controller found in the V3s,
> as well as associated pins. This fashion of the controller has two PWM
> outputs and is register-compatible with the A20.
> 
> Both PWM outputs were tested on a Lichee Pi Zero with a simple
> transistor-LED setup.
> 
> Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
> ---
>  arch/arm/boot/dts/sun8i-v3s.dtsi | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi
> index a9f5795d4e57..34a4e638c762 100644
> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
> @@ -398,6 +398,16 @@ spi0_pins: spi0-pins {
>  				pins = "PC0", "PC1", "PC2", "PC3";
>  				function = "spi0";
>  			};
> +
> +			pwm0_pin: pwm0-pin {
> +				pins = "PB4";
> +				function = "pwm0";
> +			};
> +
> +			pwm1_pin: pwm1-pin {
> +				pins = "PB5";
> +				function = "pwm1";
> +			};
>  		};
>  
>  		timer@...0c00 {
> @@ -416,6 +426,14 @@ wdt0: watchdog@...0ca0 {
>  			clocks = <&osc24M>;
>  		};
>  
> +		pwm: pwm@...1400 {
> +			compatible = "allwinner,sun7i-a20-pwm";

We should have a (documented) v3s compatible there along with the A20

Thanks!
Maxime