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mmc: mediatek: add implement of ops->hw_reset() 

add implement of ops->hw_reset() for eMMC

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chaotian Jing 2015-10-27 14:24:26 +08:00 committed by Ulf Hansson
parent 62b0d27af8
commit c9b5061e77
1 changed files with 11 additions and 0 deletions
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11
drivers/mmc/host/mtk-sd.c
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@ -64,6 +64,7 @@
#define SDC_RESP2 0x48
#define SDC_RESP3 0x4c
#define SDC_BLK_NUM 0x50
#define EMMC_IOCON 0x7c
#define SDC_ACMD_RESP 0x80
#define MSDC_DMA_SA 0x90
#define MSDC_DMA_CTRL 0x98
@ -1209,6 +1210,15 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
pm_runtime_put_autosuspend(host->dev);
}
static void msdc_hw_reset(struct mmc_host *mmc)
{
struct msdc_host *host = mmc_priv(mmc);
sdr_set_bits(host->base + EMMC_IOCON, 1);
udelay(10); /* 10us is enough */
sdr_clr_bits(host->base + EMMC_IOCON, 1);
}
static struct mmc_host_ops mt_msdc_ops = {
.post_req = msdc_post_req,
.pre_req = msdc_pre_req,
@ -1216,6 +1226,7 @@ static struct mmc_host_ops mt_msdc_ops = {
.set_ios = msdc_ops_set_ios,
.start_signal_voltage_switch = msdc_ops_switch_volt,
.card_busy = msdc_card_busy,
.hw_reset = msdc_hw_reset,
};
static int msdc_drv_probe(struct platform_device *pdev)