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From 11289568f8c1530a16721c9aeaae3ae1668eacbb Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 10 Mar 2023 11:22:24 +0000
Subject: [PATCH] ARM: dts: bcm2711-rpi-400: Restore the ACT LED
Pi 400 doesn't have an ACT LED, only a green PWR LED, but a user may
wish to remap the ACT functionality to a GPIO on the 40-pin header.
Restore the ACT LED declaration, but leave it disabled in order to
prevent a GPIO being claimed until either the act_led_gpio dtparam
or the act-led overlay is used.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/bcm2711-rpi-400.dts | 12 ++++++++----
arch/arm/boot/dts/overlays/act-led-overlay.dts | 3 ++-
2 files changed, 10 insertions(+), 5 deletions(-)
--- a/arch/arm/boot/dts/bcm2711-rpi-400.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-400.dts
@@ -512,16 +512,19 @@
};
&leds {
+ // Declare the LED but leave it disabled, in case a user wants to map it
+ // to a GPIO on the header
act_led: led-act {
default-state = "off";
- linux,default-trigger = "default-on";
- gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
+ linux,default-trigger = "mmc0";
+ gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+ status = "disabled";
};
pwr_led: led-pwr {
default-state = "off";
linux,default-trigger = "default-on";
- gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
+ gpios = <&gpio 42 GPIO_ACTIVE_HIGH>;
};
};
@@ -542,7 +545,8 @@
__overrides__ {
audio = <&chosen>,"bootargs{on='snd_bcm2835.enable_hdmi=1',off='snd_bcm2835.enable_hdmi=0'}";
- act_led_gpio = <&act_led>,"gpios:4";
+ act_led_gpio = <&act_led>,"gpios:4",
+ <&act_led>,"status=okay";
act_led_activelow = <&act_led>,"gpios:8";
act_led_trigger = <&act_led>,"linux,default-trigger";
--- a/arch/arm/boot/dts/overlays/act-led-overlay.dts
+++ b/arch/arm/boot/dts/overlays/act-led-overlay.dts
@@ -21,7 +21,8 @@
};
__overrides__ {
- gpio = <&frag0>,"gpios:4";
+ gpio = <&frag0>,"gpios:4",
+ <&frag0>,"status=okay";
activelow = <&frag0>,"gpios:8";
};
};
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