diff options
| author | Łukasz Majewski <l.majewski@samsung.com> | 2012-03-12 22:07:18 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-05-08 18:02:21 -0500 |
| commit | 62722036410b7887a04cf6705effb3122fb9b549 (patch) | |
| tree | 85ff614d4d3deb0cb6ea676ae0dd869c1797e2bb /drivers/mmc/mmc.c | |
| parent | 0a6deb3251a68b5be640ab1b848ca67e906b75ce (diff) | |
mmc:fix: Set mmc width according to MMC host capabilities
This patch sets the MMC width according to the MMC host capabilities.
It turned out, that there are some targets (e.g. GONI), which are able
to read data from SPI only at 4 bit mode.
This patch restricts the width number according to the MMC host.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Andy Fleming <afleming@gmail.com>
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 596732e80e..aebe578ff6 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1199,7 +1199,9 @@ int mmc_startup(struct mmc *mmc) else mmc_set_clock(mmc, 25000000); } else { - for (width = EXT_CSD_BUS_WIDTH_8; width >= 0; width--) { + width = ((mmc->host_caps & MMC_MODE_MASK_WIDTH_BITS) >> + MMC_MODE_WIDTH_BITS_SHIFT); + for (; width >= 0; width--) { /* Set the card to use 4 bit*/ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, width); |