linux-kernel - Re: [PATCH v2] arm: dts: bcm2711: Describe Ethernet LEDs

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Date: Tue, 23 Apr 2024 07:44:13 +0200
From: Stefan Wahren <wahrenst@....net>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
 linux-arm-kernel@...ts.infradead.org
Cc: andrew@...n.ch, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>,
 Andre Przywara <andre.przywara@....com>,
 Claudiu Beznea <claudiu.beznea@...on.dev>, Baruch Siach <baruch@...s.co.il>,
 Shawn Guo <shawnguo@...nel.org>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Enric Balletbo i Serra <eballetbo@...il.com>,
 Heiko Stuebner <heiko@...ech.de>, Viresh Kumar <viresh.kumar@...aro.org>,
 Paul Barker <paul.barker@...cloud.com>,
 Uwe Kleine-König <uwe@...ine-koenig.org>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>,
 "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
 <linux-rpi-kernel@...ts.infradead.org>,
 open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arm: dts: bcm2711: Describe Ethernet LEDs

Hi Florian,

Am 23.04.24 um 01:08 schrieb Florian Fainelli:
> Describe the Ethernet LEDs for the Raspberry Pi 4 model B board as well
> as the Raspberry Pi 4 CM board. The Raspberry Pi 400 board does not
> include RJ45 connector LEDs so the 'leds' node is deleted accordingly.
>
> Signed-off-by: Florian Fainelli <florian.fainelli@...adcom.com>
> ---
> Changes in v2:
>
> - added "function = LED_FUNCTION_LAN"
>
>   .../arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts | 20 +++++++++++++++++
>   .../arm/boot/dts/broadcom/bcm2711-rpi-400.dts |  1 +
>   .../boot/dts/broadcom/bcm2711-rpi-cm4-io.dts  | 22 +++++++++++++++++++
>   3 files changed, 43 insertions(+)
>
> diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts
> index cfc8cb5e10ba..7a0f495ff726 100644
> --- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts
> +++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-4-b.dts
> @@ -5,6 +5,7 @@
>   #include "bcm283x-rpi-led-deprecated.dtsi"
>   #include "bcm283x-rpi-usb-peripheral.dtsi"
>   #include "bcm283x-rpi-wifi-bt.dtsi"
> +#include <dt-bindings/leds/common.h>
>
>   / {
>   	compatible = "raspberrypi,4-model-b", "brcm,bcm2711";
> @@ -204,6 +205,25 @@ &genet_mdio {
>   	phy1: ethernet-phy@1 {
>   		/* No PHY interrupt */
>   		reg = <0x1>;
> +
> +		leds {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			leds@0 {
> +				reg = <0>;
> +				color = <LED_COLOR_ID_GREEN>;
> +				function = LED_FUNCTION_LAN;
> +				default-state = "keep";
> +			};
> +
> +			leds@1 {
> +				reg = <1>;
> +				color = <LED_COLOR_ID_AMBER>;
> +				function = LED_FUNCTION_LAN;
> +				default-state = "keep";
> +			};
> +		};
this looks good to me, but i'm wondering about the address numbering.
This ones starts with 0 and the CM4 starts with 1. Does this come from
the PHY?
>   	};
>   };
>
> diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts b/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts
> index 5a2869a18bd5..ca9be91b4f36 100644
> --- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts
> +++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts
> @@ -30,6 +30,7 @@ &expgpio {
>
>   &genet_mdio {
>   	clock-frequency = <1950000>;
> +	/delete-node/ leds;
>   };
>
>   &led_pwr {
> diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
> index 7c6a5bdf48aa..76cb20373095 100644
> --- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
> +++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
> @@ -1,5 +1,6 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /dts-v1/;
> +#include <dt-bindings/leds/common.h>
>   #include "bcm2711-rpi-cm4.dtsi"
>   #include "bcm283x-rpi-led-deprecated.dtsi"
>   #include "bcm283x-rpi-usb-host.dtsi"
> @@ -110,6 +111,27 @@ rtc@51 {
>   	};
>   };
>
> +&phy1 {
> +	leds {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		leds@1 {
> +			reg = <1>;
> +			color = <LED_COLOR_ID_GREEN>;
> +			function = LED_FUNCTION_LAN;
> +			default-state = "keep";
> +		};
> +
> +		leds@2 {
> +			reg = <2>;
> +			color = <LED_COLOR_ID_AMBER>;
> +			function = LED_FUNCTION_LAN;
> +			default-state = "keep";
> +		};
> +	};
> +};
> +
>   &led_act {
>   	gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
>   };