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mmc: core: fix the signaling 1.8V for HS200 

Currently only 1.2V is treated for HS200 mode. If the host has only
1.8V I/O capability not 1.2V, mmc_set_signal_voltage can't be called
for 1.8V HS200. EXT_CSD_CARD_TYPE_SDR_1_8V needs to be considered.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Seungwon Jeon 2012-04-25 16:18:01 +09:00 committed by Chris Ball
parent 96cf5f02ae
commit 10942aa40a
1 changed files with 7 additions and 5 deletions
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12
drivers/mmc/core/mmc.c
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@ -728,7 +728,7 @@ static int mmc_select_powerclass(struct mmc_card *card,
*/
static int mmc_select_hs200(struct mmc_card *card)
{
int idx, err = 0;
int idx, err = -EINVAL;
struct mmc_host *host;
static unsigned ext_csd_bits[] = {
EXT_CSD_BUS_WIDTH_4,
@ -744,10 +744,12 @@ static int mmc_select_hs200(struct mmc_card *card)
host = card->host;
if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0))
err = mmc_set_signal_voltage(host,
MMC_SIGNAL_VOLTAGE_180, 0);
host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0);
if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V &&
host->caps2 & MMC_CAP2_HS200_1_8V_SDR)
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, 0);
/* If fails try again during next card power cycle */
if (err)