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36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
From b0ec72e3651aeffca2e31849e6f8d264f933270e Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 19 Mar 2024 09:48:48 +0000
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Subject: [PATCH 0978/1085] ARM: dts: pi400: Force stdout-path to serial0
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The upstream Pi DTS files select serial1 for stdout-path, but because of
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the way the downstream kernel numbers UARTS, serial0 is required in the
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downstream DTS. Using the wrong value breaks U-boot.
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In the 6.6 kernel the downstream Pi 400 DTS was made closer to upstream,
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inheriting most of its content from the Pi 4B DTS, but because of the
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order of inclusion it lost the override for stdout-path. Restore that
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override.
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See: https://github.com/raspberrypi/firmware/issues/1875
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts
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+++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-400.dts
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@@ -43,6 +43,12 @@
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// =============================================
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// Downstream rpi- changes
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+/ {
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+ chosen {
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+ stdout-path = "serial0:115200n8";
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+ };
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+};
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+
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&audio_pins {
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brcm,pins = <>;
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brcm,function = <>;
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