diff options
| -rw-r--r-- | arch/arm/mach-rockchip/spl.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/arm/mach-rockchip/spl.c b/arch/arm/mach-rockchip/spl.c index 1586a093fc3..3ce7e792b5a 100644 --- a/arch/arm/mach-rockchip/spl.c +++ b/arch/arm/mach-rockchip/spl.c @@ -32,18 +32,26 @@ __weak const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = { const char *board_spl_was_booted_from(void) { - u32 bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR); + static u32 brom_bootsource_id_cache = BROM_BOOTSOURCE_UNKNOWN; + u32 bootdevice_brom_id; const char *bootdevice_ofpath = NULL; + if (brom_bootsource_id_cache != BROM_BOOTSOURCE_UNKNOWN) + bootdevice_brom_id = brom_bootsource_id_cache; + else + bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR); + if (bootdevice_brom_id < ARRAY_SIZE(boot_devices)) bootdevice_ofpath = boot_devices[bootdevice_brom_id]; - if (bootdevice_ofpath) + if (bootdevice_ofpath) { + brom_bootsource_id_cache = bootdevice_brom_id; debug("%s: brom_bootdevice_id %x maps to '%s'\n", __func__, bootdevice_brom_id, bootdevice_ofpath); - else + } else { debug("%s: failed to resolve brom_bootdevice_id %x\n", __func__, bootdevice_brom_id); + } return bootdevice_ofpath; } |