28 lines
1,019 B
Text
28 lines
1,019 B
Text
rpi: Use firmware provided device tree
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Currently the firmware generates a device tree for us that we could
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just use to adjust ourselves. We then on boot throw that away and
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use our own built-in device tree to configure device access.
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This is bad for a multitude of reasons. For starters, it breaks
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overlay support in config.txt, confusing users. Much worse however
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is that we are stuck with individual U-Boot builds per board.
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The firmware can easily give us the right DT depending on the
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target board and revision though.
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So let's use the firmware provided device tree instead. That way
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U-Boot as well as payloads loaded by it can automatically adapt
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to variants of RPi hardware.
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Index: configs/rpi_2_defconfig
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--- configs/rpi_2_defconfig.orig
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+++ configs/rpi_2_defconfig
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@@ -17,7 +17,7 @@ CONFIG_CMD_GPIO=y
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CONFIG_CMD_MMC=y
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CONFIG_CMD_USB=y
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CONFIG_CMD_FS_UUID=y
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-CONFIG_OF_EMBED=y
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+CONFIG_OF_BOARD=y
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CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
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CONFIG_SYS_RELOC_GD_ENV_ADDR=y
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CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
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