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author | Tom Rini <trini@ti.com> | 2015-02-13 13:11:33 -0500 |
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committer | Tom Rini <trini@ti.com> | 2015-02-13 13:11:33 -0500 |
commit | eca99c02566534940b95ee77b6ea1f098da93adc (patch) | |
tree | 9c3361fbc93d02c01a8717d345d25b2c17b192aa /board/samsung/common | |
parent | 757566d1567a98f5c331c14f088001dbfe187191 (diff) | |
parent | 2e82e9252695a612ab0cbf40fa0c7368515f6506 (diff) | |
download | u-boot-imx-eca99c02566534940b95ee77b6ea1f098da93adc.zip u-boot-imx-eca99c02566534940b95ee77b6ea1f098da93adc.tar.gz u-boot-imx-eca99c02566534940b95ee77b6ea1f098da93adc.tar.bz2 |
Merge git://git.denx.de/u-boot-samsung
Diffstat (limited to 'board/samsung/common')
-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 8b4c8e9..da2245f 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); + } +} |