diff options
| author | Daniel Chen <daniel.ch_chen@htc.com> | 2009-12-09 09:45:36 -0800 |
|---|---|---|
| committer | Eric Nelson <eric.nelson@boundarydevices.com> | 2013-09-03 14:08:24 -0700 |
| commit | a8bf5d2634177ba01968ad7e87a63991a4e77d55 (patch) | |
| tree | 8ee1938bf27acc7c9fcfe2c2aaea718fed390e83 /drivers/mmc | |
| parent | 56c95f73dbe203b6270b10f0f13aec2f119844f6 (diff) | |
mmc: sdio: Add high speed support to sdio_reset_comm()
Signed-off-by: San Mehat <san@google.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index f593082b4898..e03d512906a0 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -927,7 +927,28 @@ int sdio_reset_comm(struct mmc_card *card) goto err; } - mmc_set_clock(host, card->cis.max_dtr); + /* + * Switch to high-speed (if supported). + */ + err = sdio_enable_hs(card); + if (err) + goto err; + + /* + * Change to the card's maximum speed. + */ + if (mmc_card_highspeed(card)) { + /* + * The SDIO specification doesn't mention how + * the CIS transfer speed register relates to + * high-speed, but it seems that 50 MHz is + * mandatory. + */ + mmc_set_clock(host, 50000000); + } else { + mmc_set_clock(host, card->cis.max_dtr); + } + err = sdio_enable_wide(card); if (err) goto err; |