ARM: dts: pi400: Force stdout-path to serial0 #6054
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The upstream Pi DTS files select serial1 for stdout-path, but because of the way the downstream kernel numbers UARTS, serial0 is required in the downstream DTS. Using the wrong value breaks U-boot. In the 6.6 kernel the downstream Pi 400 DTS was made closer to upstream, inheriting most of its content from the Pi 4B DTS, but because of the order of inclusion it lost the override for stdout-path. Restore that override. See: raspberrypi/firmware#1875 Signed-off-by: Phil Elwell <[email protected]>
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See: raspberrypi/linux#6054 kernel: overlays: i2c-rtc: pcf8563 supports wakeup-source See: raspberrypi/linux#6052 kernel: ARM: dts: bcm2712: Move /soc/sound to bcm2712-rpi See: raspberrypi/linux#6051 kernel: I2C: Improve reliability at higher bus speeds See: raspberrypi/linux#6050 kernel: dmaengine: dw-axi-dmac: Fix a non-atomic update See: raspberrypi/linux#6044 kernel: dtoverlays: Add a disconnect_on_idle override to i2c-mux See: raspberrypi/linux#6040 kernel: Add support for generic i2c-mux base-nr property See: raspberrypi/linux#6038 kernel: dtoverlays: Fixup pendown gpio polarity for ads7846 users See: raspberrypi/linux#6029
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See: raspberrypi/linux#6054 kernel: overlays: i2c-rtc: pcf8563 supports wakeup-source See: raspberrypi/linux#6052 kernel: ARM: dts: bcm2712: Move /soc/sound to bcm2712-rpi See: raspberrypi/linux#6051 kernel: I2C: Improve reliability at higher bus speeds See: raspberrypi/linux#6050 kernel: dmaengine: dw-axi-dmac: Fix a non-atomic update See: raspberrypi/linux#6044 kernel: dtoverlays: Add a disconnect_on_idle override to i2c-mux See: raspberrypi/linux#6040 kernel: Add support for generic i2c-mux base-nr property See: raspberrypi/linux#6038 kernel: dtoverlays: Fixup pendown gpio polarity for ads7846 users See: raspberrypi/linux#6029
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The upstream Pi DTS files select serial1 for stdout-path, but because of the way the downstream kernel numbers UARTS, serial0 is required in the downstream DTS. Using the wrong value breaks U-boot.
In the 6.6 kernel the downstream Pi 400 DTS was made closer to upstream, inheriting most of its content from the Pi 4B DTS, but because of the order of inclusion it lost the override for stdout-path. Restore that override.
See: raspberrypi/firmware#1875