diff options
| author | Alex Deymo <deymo@google.com> | 2017-04-02 08:25:20 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-05-10 00:35:06 (GMT) |
| commit | 82f766d1d2c580a29bed340ea4dd9fa1b8ff05e0 (patch) | |
| tree | 81c70f6e469d4431d3852e2d6fe43443fff6ad5a /board | |
| parent | 45a6d231b2f9b891a7df517fc40b8466e12f2b57 (diff) | |
| download | u-boot-82f766d1d2c580a29bed340ea4dd9fa1b8ff05e0.tar.xz | |
Allow boards to initialize the DT at runtime.
In some boards like the Raspberry Pi the initial bootloader will pass
a DT to the kernel. When using U-Boot as such kernel, the board code in
U-Boot should be able to provide U-Boot with this, already assembled
device tree blob.
This patch introduces a new config option CONFIG_OF_BOARD to use instead
of CONFIG_OF_EMBED or CONFIG_OF_SEPARATE which will initialize the DT
from a board-specific funtion instead of bundling one with U-Boot or as
a separated file. This allows boards like the Raspberry Pi to reuse the
device tree passed from the bootcode.bin and start.elf firmware
files, including the run-time selected device tree overlays.
Signed-off-by: Alex Deymo <deymo@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'board')
| -rw-r--r-- | board/raspberrypi/rpi/rpi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index 82da9e5..d3c6ba5 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -470,6 +470,16 @@ int board_init(void) return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); } +/* + * If the firmware passed a device tree use it for U-Boot. + */ +void *board_fdt_blob_setup(void) +{ + if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) + return NULL; + return (void *)fw_dtb_pointer; +} + int ft_board_setup(void *blob, bd_t *bd) { /* |