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Commit c9b5061e authored by Chaotian Jing's avatar Chaotian Jing Committed by Ulf Hansson
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mmc: mediatek: add implement of ops->hw_reset() 



add implement of ops->hw_reset() for eMMC

Signed-off-by: default avatarChaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 62b0d27a

drivers/mmc/host/mtk-sd.c

+11 −0
Original line number Diff line number Diff line
@@ -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)