linux-kernel - Re: [PATCH 2/2] arm64: dts: amlogic: add libretech cottonwood support

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Date:   Wed, 4 Oct 2023 11:20:36 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Kevin Hilman <khilman@...libre.com>, Da Xue <da.xue@...retech.co>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH 2/2] arm64: dts: amlogic: add libretech cottonwood support

On 02/10/2023 16:10, Jerome Brunet wrote:
> Add support for the Libretech cottonwood board family.
> These 2 boards are based on the same PCB, with an RPi B form factor.
> 
> The "Alta" board uses an a311d while the "Solitude" variant uses an s905d3.
> 
> Co-developed-by: Da Xue <da.xue@...retech.co>
> Signed-off-by: Da Xue <da.xue@...retech.co>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>   arch/arm64/boot/dts/amlogic/Makefile          |   2 +
>   .../amlogic/meson-g12b-a311d-libretech-cc.dts | 133 ++++
>   .../amlogic/meson-libretech-cottonwood.dtsi   | 610 ++++++++++++++++++
>   .../amlogic/meson-sm1-s905d3-libretech-cc.dts |  89 +++
>   4 files changed, 834 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-a311d-libretech-cc.dts
>   create mode 100644 arch/arm64/boot/dts/amlogic/meson-libretech-cottonwood.dtsi
>   create mode 100644 arch/arm64/boot/dts/amlogic/meson-sm1-s905d3-libretech-cc.dts
> 

<snip>

> +
> +	leds-pwm {
> +		compatible = "pwm-leds";
> +
> +		led-green {
> +			color = <LED_COLOR_ID_GREEN>;
> +			function = LED_FUNCTION_STATUS;
> +			linux,default-trigger = "default-on";
> +			panic-indicator;
> +			max-brightness = <255>;
> +			pwms = <&pwm_cd 1 1250 0>;
> +			active-low;
> +		};
> +
> +		led-blue {
> +			color = <LED_COLOR_ID_BLUE>;
> +			function = LED_FUNCTION_ACTIVITY;
> +			linux,default-trigger = "activity";

"activity" isn't documented, perhaps heartbeat instead ?

> +			max-brightness = <255>;
> +			pwms = <&pwm_ab 1 1250 0>;
> +			active-low;
> +		};

leds subnodes should be named as led(-[0-9a-f]+)

see Documentation/devicetree/bindings/leds/leds-pwm.yaml

> +	};
> +
> +	leds-gpio {
> +		compatible = "gpio-leds";
> +
> +		led-orange {
> +			color = <LED_COLOR_ID_AMBER>;
> +			function = LED_FUNCTION_STANDBY;
> +			gpios = <&gpio GPIOX_6 GPIO_ACTIVE_LOW>;
> +		};

Ditto, but you can simply use "led" since it's the only one.

See Documentation/devicetree/bindings/leds/leds-gpio.yaml

Neil


<snip>