diff options
| author | Daniel Chen <daniel.ch_chen@htc.com> | 2011-12-02 14:01:23 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-12-02 14:01:23 +0800 |
| commit | 0fc974dcd3fe7c932d8bc70e1c8bab1e311dfe8b (patch) | |
| tree | e1caf4d42140fdc577df976decc9d2452e55dff5 /drivers | |
| parent | 39339c4359d911fc4ab8bf11fedc43c053948605 (diff) | |
mmc: sdio: Add high speed support to sdio_reset_comm()
Signed-off-by: San Mehat <san@google.com>
Diffstat (limited to 'drivers')
| -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 903dc539b08..d6571790791 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -967,7 +967,28 @@ 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; |