From fce72f79ca7aade5feb6ff5ecf43a365a084a47e Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Fri, 17 Oct 2025 13:37:41 +0100 Subject: [PATCH] overlays: Update the README Replace the use of vcdbg with vclog, and correct the documentation URL. See: https://github.com/raspberrypi/linux/issues/7093 Signed-off-by: Phil Elwell --- arch/arm/boot/dts/overlays/README | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README index 23674cdcb1a3..09fbbdd87884 100644 --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -5975,16 +5975,17 @@ Params: brightness Set the initial brightness for the LEDs. The Troubleshooting =============== -If you are experiencing problems that you think are DT-related, enable DT -diagnostic output by adding this to /boot/config.txt: +If you are experiencing problems that you think are DT-related, first check for +error messages from the firmware by running: + + sudo vclog -m + +To see more details about the changes to the Device Tree, add the following to +/boot/firmware/config.txt: dtdebug=on -and rebooting. Then run: - - sudo vcdbg log msg - -and look for relevant messages. +and reboot, then use vclog as above. Further reading =============== @@ -5992,4 +5993,4 @@ Further reading This is only meant to be a quick introduction to the subject of Device Tree on Raspberry Pi. There is a more complete explanation here: -http://www.raspberrypi.org/documentation/configuration/device-tree.md +https://www.raspberrypi.com/documentation/computers/configuration.html#device-trees-overlays-and-parameters