2023-11-17 16:31:36 +00:00
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From 385fdae137cd76a62fed2e54598b5c0fec2bf242 Mon Sep 17 00:00:00 2001
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2023-10-09 16:43:46 +00:00
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 19 Sep 2023 20:31:34 +0100
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2023-11-17 16:31:36 +00:00
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Subject: [PATCH] overlays: Add a sample hat_map
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2023-10-09 16:43:46 +00:00
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The HAT map is way of associating named overlays with HATs whose
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EEPROMs were programmed with the contents of the overlay.
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Unfortunately, change in the DT and kernel drivers has meant that some
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of these embedded overlays no longer function, or even don't apply.
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The HAT map is a mapping from HAT UUIDs to overlay names. If a HAT with
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a listed UUID is detected, the embedded overlay is ignored and the
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overlay named in the mapping is loaded in its place.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 2 +-
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arch/arm/boot/dts/overlays/hat_map.dts | 13 +++++++++++++
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2 files changed, 14 insertions(+), 1 deletion(-)
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create mode 100644 arch/arm/boot/dts/overlays/hat_map.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -1,6 +1,6 @@
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# Overlays for the Raspberry Pi platform
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-dtb-$(CONFIG_ARCH_BCM2835) += overlay_map.dtb
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+dtb-$(CONFIG_ARCH_BCM2835) += overlay_map.dtb hat_map.dtb
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dtbo-$(CONFIG_ARCH_BCM2835) += \
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act-led.dtbo \
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/hat_map.dts
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@@ -0,0 +1,13 @@
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+/dts-v1/;
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+
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+/ {
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+ iqaudio-pi-codecplus {
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+ uuid = [ dc1c9594 c1ab 4c6c acda a88dc59a3c5b ];
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+ overlay = "iqaudio-codec";
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+ };
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+
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+ recalbox-rgbdual {
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+ uuid = [ 1c955808 681f 4bbc a2ef b7ea47cd388e ];
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+ overlay = "recalboxrgbdual";
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+ };
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+};
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