diff options
Diffstat (limited to 'board/samsung/common/board.c')
| -rw-r--r-- | board/samsung/common/board.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c index 8b4c8e9a9d..da2245ff9d 100644 --- a/board/samsung/common/board.c +++ b/board/samsung/common/board.c @@ -355,3 +355,31 @@ int misc_init_r(void) return 0; } #endif + +void reset_misc(void) +{ + struct gpio_desc gpio = {}; + int node; + + node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, + "samsung,emmc-reset"); + if (node < 0) + return; + + gpio_request_by_name_nodev(gd->fdt_blob, node, "reset-gpio", 0, &gpio, + GPIOD_IS_OUT); + + if (dm_gpio_is_valid(&gpio)) { + /* + * Reset eMMC + * + * FIXME: Need to optimize delay time. Minimum 1usec pulse is + * required by 'JEDEC Standard No.84-A441' (eMMC) + * document but real delay time is expected to greater + * than 1usec. + */ + dm_gpio_set_value(&gpio, 0); + mdelay(10); + dm_gpio_set_value(&gpio, 1); + } +} |