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| author | Adrian Hunter <adrian.hunter@intel.com> | 2011-08-29 16:42:11 +0300 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 16:32:05 -0400 |
| commit | b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0 (patch) | |
| tree | c4c9597d0631554bffeecbcc6a2a7ec3037ea78c /drivers/mmc/core/mmc.c | |
| parent | 8e3336b1e4378f7d205af9b25dcc9e645c8a9609 (diff) | |
| download | linux-b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0.tar.gz linux-b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0.tar.bz2 linux-b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0.zip | |
mmc: core: add eMMC hardware reset support
eMMC's may have a hardware reset line. This patch provides a
host controller operation to implement hardware reset and
a function to reset and reinitialize the card. Also, for MMC,
the reset is always performed before initialization.
The host must set the new host capability MMC_CAP_HW_RESET
to enable hardware reset.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/core/mmc.c')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index b74e6f14b3ac..7adc30da8366 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -402,8 +402,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) ext_csd[EXT_CSD_TRIM_MULT]; } - if (card->ext_csd.rev >= 5) + if (card->ext_csd.rev >= 5) { card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; + card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; + } if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) card->erased_byte = 0xFF; |