diff options
| author | Chaotian Jing | 2015-10-27 14:24:26 +0800 |
|---|---|---|
| committer | Ulf Hansson | 2015-10-27 10:21:16 +0100 |
| commit | c9b5061e7728da1f7192ecaf3ffab4a7300920dc (patch) | |
| tree | 85a1dce88ee4a767aff4219c41e474699097fd4a /drivers/mmc | |
| parent | 62b0d27af85ef1b1729c2ed675c12020e1fbf10f (diff) | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 385816375614..562764430881 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -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 @@ end: 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) |