From 03b9c05018876a32211e3913b81f8ce60d7abe00 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Tue, 19 Sep 2023 20:31:34 +0100 Subject: [PATCH] overlays: Add a sample hat_map The HAT map is way of associating named overlays with HATs whose EEPROMs were programmed with the contents of the overlay. Unfortunately, change in the DT and kernel drivers has meant that some of these embedded overlays no longer function, or even don't apply. The HAT map is a mapping from HAT UUIDs to overlay names. If a HAT with a listed UUID is detected, the embedded overlay is ignored and the overlay named in the mapping is loaded in its place. Signed-off-by: Phil Elwell --- arch/arm/boot/dts/overlays/Makefile | 2 +- arch/arm/boot/dts/overlays/hat_map.dts | 13 +++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) create mode 100644 arch/arm/boot/dts/overlays/hat_map.dts diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile index b4fbefe..09713ac 100644 --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -1,6 +1,6 @@ # Overlays for the Raspberry Pi platform -dtb-$(CONFIG_ARCH_BCM2835) += overlay_map.dtb +dtb-$(CONFIG_ARCH_BCM2835) += overlay_map.dtb hat_map.dtb dtbo-$(CONFIG_ARCH_BCM2835) += \ act-led.dtbo \ diff --git a/arch/arm/boot/dts/overlays/hat_map.dts b/arch/arm/boot/dts/overlays/hat_map.dts new file mode 100644 index 0000000..bf3a140 --- /dev/null +++ b/arch/arm/boot/dts/overlays/hat_map.dts @@ -0,0 +1,13 @@ +/dts-v1/; + +/ { + iqaudio-pi-codecplus { + uuid = [ dc1c9594 c1ab 4c6c acda a88dc59a3c5b ]; + overlay = "iqaudio-codec"; + }; + + recalbox-rgbdual { + uuid = [ 1c955808 681f 4bbc a2ef b7ea47cd388e ]; + overlay = "recalboxrgbdual"; + }; +}; -- 2.7.4