linux-kernel - Re: [PATCH v5 3/3] ARM: dts: marvell: Add 7-segment LED display on x530

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Date: Fri, 08 Mar 2024 08:36:40 +0100
From: Gregory CLEMENT <gregory.clement@...tlin.com>
To: Chris Packham <chris.packham@...iedtelesis.co.nz>, andy@...nel.org,
 geert@...ux-m68k.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, andrew@...n.ch,
 sebastian.hesselbarth@...il.com, lee@...nel.org
Cc: linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Chris
 Packham <chris.packham@...iedtelesis.co.nz>
Subject: Re: [PATCH v5 3/3] ARM: dts: marvell: Add 7-segment LED display on
 x530

Chris Packham <chris.packham@...iedtelesis.co.nz> writes:

> The Allied Telesis x530 products have a 7-segment LED display which is
> used for node identification when the devices are stacked. Represent
> this as a gpio-7-segment device.
>
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>

Acked-by: Gregory CLEMENT <gregory.clement@...tlin.com>

Normally, this patch should be taken in mvebu and then merged by
arm-soc. However, I haven't seen any other patch touching this file (so
no risk of merge conflict) and I think it's too late for me to make a
new pull request to arm-soc. So I'm not against it being taken with the
rest of the patches. However, I think it would be a good idea to see
what Arnd thinks about it.

Gregory

> ---
>
> Notes:
>     Changes in v5:
>     - group GPIO specifiers
>     Changes in v4:
>     - Use correct compatible name in commit message
>     Changes in v3:
>     - Use compatible = "gpio-7-segment" as suggested by Rob
>     Changes in v2:
>     - Use compatible = "generic-gpio-7seg" to keep checkpatch.pl happy
>
>  arch/arm/boot/dts/marvell/armada-385-atl-x530.dts | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/marvell/armada-385-atl-x530.dts b/arch/arm/boot/dts/marvell/armada-385-atl-x530.dts
> index 5a9ab8410b7b..2fb7304039be 100644
> --- a/arch/arm/boot/dts/marvell/armada-385-atl-x530.dts
> +++ b/arch/arm/boot/dts/marvell/armada-385-atl-x530.dts
> @@ -43,6 +43,17 @@ uart0: serial@...00 {
>  			};
>  		};
>  	};
> +
> +	led-7seg {
> +		compatible = "gpio-7-segment";
> +		segment-gpios = <&led_7seg_gpio 0 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 1 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 2 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 3 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 4 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 5 GPIO_ACTIVE_LOW>,
> +				<&led_7seg_gpio 6 GPIO_ACTIVE_LOW>;
> +	};
>  };
>  
>  &pciec {
> @@ -149,7 +160,7 @@ i2c@3 {
>  			#size-cells = <0>;
>  			reg = <3>;
>  
> -			gpio@20 {
> +			led_7seg_gpio: gpio@20 {
>  				compatible = "nxp,pca9554";
>  				gpio-controller;
>  				#gpio-cells = <2>;
> -- 
> 2.43.2
>

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com