From 10942aa40a595d7ff8b4e90f8a762e816367cac3 Mon Sep 17 00:00:00 2001 From: Seungwon Jeon Date: Wed, 25 Apr 2012 16:18:01 +0900 Subject: [PATCH] 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 Reviewed-by: Subhash Jadavani Signed-off-by: Chris Ball --- drivers/mmc/core/mmc.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 0477769a8841..2a9b7b1a4801 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -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)