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>
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@ -64,6 +64,7 @@
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#define SDC_RESP2 0x48
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#define SDC_RESP3 0x4c
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#define SDC_BLK_NUM 0x50
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#define EMMC_IOCON 0x7c
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#define SDC_ACMD_RESP 0x80
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#define MSDC_DMA_SA 0x90
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#define MSDC_DMA_CTRL 0x98
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@ -1209,6 +1210,15 @@ end:
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pm_runtime_put_autosuspend(host->dev);
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}
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static void msdc_hw_reset(struct mmc_host *mmc)
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{
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struct msdc_host *host = mmc_priv(mmc);
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sdr_set_bits(host->base + EMMC_IOCON, 1);
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udelay(10); /* 10us is enough */
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sdr_clr_bits(host->base + EMMC_IOCON, 1);
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}
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static struct mmc_host_ops mt_msdc_ops = {
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.post_req = msdc_post_req,
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.pre_req = msdc_pre_req,
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@ -1216,6 +1226,7 @@ static struct mmc_host_ops mt_msdc_ops = {
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.set_ios = msdc_ops_set_ios,
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.start_signal_voltage_switch = msdc_ops_switch_volt,
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.card_busy = msdc_card_busy,
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.hw_reset = msdc_hw_reset,
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};
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static int msdc_drv_probe(struct platform_device *pdev)
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