lk patches the fdt to set some device's MAC addresses and more importantly to patch in the simple-framebuffer node that we want u-boot to see.
Signed-off-by: Rob Clark robdclark@gmail.com --- board/qualcomm/dragonboard410c/Makefile | 1 + board/qualcomm/dragonboard410c/dragonboard410c.c | 8 ++++++ board/qualcomm/dragonboard410c/lowlevel_init.S | 36 ++++++++++++++++++++++++ 3 files changed, 45 insertions(+) create mode 100644 board/qualcomm/dragonboard410c/lowlevel_init.S
diff --git a/board/qualcomm/dragonboard410c/Makefile b/board/qualcomm/dragonboard410c/Makefile index cd678088fa..5082383be4 100644 --- a/board/qualcomm/dragonboard410c/Makefile +++ b/board/qualcomm/dragonboard410c/Makefile @@ -5,4 +5,5 @@ #
obj-y := dragonboard410c.o +obj-y += lowlevel_init.o extra-y += head.o diff --git a/board/qualcomm/dragonboard410c/dragonboard410c.c b/board/qualcomm/dragonboard410c/dragonboard410c.c index 37d0b85e0e..1fa4dc1b15 100644 --- a/board/qualcomm/dragonboard410c/dragonboard410c.c +++ b/board/qualcomm/dragonboard410c/dragonboard410c.c @@ -27,6 +27,14 @@ int dram_init_banksize(void) return 0; }
+extern unsigned long fw_dtb_pointer; + +void *board_fdt_blob_setup(void) +{ + if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) + return NULL; + return (void *)fw_dtb_pointer; +}
int board_prepare_usb(enum usb_init_type type) { diff --git a/board/qualcomm/dragonboard410c/lowlevel_init.S b/board/qualcomm/dragonboard410c/lowlevel_init.S new file mode 100644 index 0000000000..cdbd8e14db --- /dev/null +++ b/board/qualcomm/dragonboard410c/lowlevel_init.S @@ -0,0 +1,36 @@ +/* + * (C) Copyright 2016 + * Cédric Schieli cschieli@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> + +.align 8 +.global fw_dtb_pointer +fw_dtb_pointer: +#ifdef CONFIG_ARM64 + .dword 0x0 +#else + .word 0x0 +#endif + +/* + * Routine: save_boot_params (called after reset from start.S) + * Description: save ATAG/FDT address provided by the firmware at boot time + */ + +.global save_boot_params +save_boot_params: + + /* The firmware provided ATAG/FDT address can be found in r2/x0 */ +#ifdef CONFIG_ARM64 + adr x8, fw_dtb_pointer + str x0, [x8] +#else + str r2, fw_dtb_pointer +#endif + + /* Returns */ + b save_boot_params_ret