diff options
Diffstat (limited to 'arch/arm/mach-aspeed/ast2600/spl.c')
| -rw-r--r-- | arch/arm/mach-aspeed/ast2600/spl.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/mach-aspeed/ast2600/spl.c b/arch/arm/mach-aspeed/ast2600/spl.c index 6c49d6aede8..53c8a15bf9c 100644 --- a/arch/arm/mach-aspeed/ast2600/spl.c +++ b/arch/arm/mach-aspeed/ast2600/spl.c @@ -7,6 +7,7 @@ #include <dm.h> #include <spl.h> #include <init.h> +#include <linux/err.h> #include <asm/io.h> #include <asm/arch/scu_ast2600.h> #include <asm/global_data.h> @@ -21,8 +22,37 @@ void board_init_f(ulong dummy) dram_init(); } +/* + * Try to detect the boot mode. Fallback to the default, + * memory mapped SPI XIP booting if detection failed. + */ u32 spl_boot_device(void) { + int rc; + struct udevice *scu_dev; + struct ast2600_scu *scu; + + rc = uclass_get_device_by_driver(UCLASS_CLK, + DM_DRIVER_GET(aspeed_ast2600_scu), &scu_dev); + if (rc) { + debug("%s: failed to get SCU driver\n", __func__); + goto out; + } + + scu = devfdt_get_addr_ptr(scu_dev); + if (IS_ERR_OR_NULL(scu)) { + debug("%s: failed to get SCU base\n", __func__); + goto out; + } + + /* boot from UART has higher priority */ + if (scu->hwstrap2 & SCU_HWSTRAP2_BOOT_UART) + return BOOT_DEVICE_UART; + + if (scu->hwstrap1 & SCU_HWSTRAP1_BOOT_EMMC) + return BOOT_DEVICE_MMC1; + +out: return BOOT_DEVICE_RAM; } |