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Commit 186cd8b7 authored by Jerome Brunet's avatar Jerome Brunet Committed by Ulf Hansson
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mmc: meson-gx: implement card_busy callback 



Implement the card_busy callback to be able to verify that the
card is done dealing with voltage switch, when the support is
added later on.

Reviewed-by: default avatarKevin Hilman <khilman@baylibre.com>
Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 74858655

drivers/mmc/host/meson-gx-mmc.c

+13 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ 


#define SD_EMMC_STATUS 0x48

#define   STATUS_BUSY BIT(31)

#define   STATUS_DATI GENMASK(23, 16)



#define SD_EMMC_IRQ_EN 0x4c

#define   IRQ_RXD_ERR_MASK GENMASK(7, 0)
@@ -902,6 +903,17 @@ static void meson_mmc_cfg_init(struct meson_host *host) 
	writel(cfg, host->regs + SD_EMMC_CFG);

}



static int meson_mmc_card_busy(struct mmc_host *mmc)

{

	struct meson_host *host = mmc_priv(mmc);

	u32 regval;



	regval = readl(host->regs + SD_EMMC_STATUS);



	/* We are only interrested in lines 0 to 3, so mask the other ones */

	return !(FIELD_GET(STATUS_DATI, regval) & 0xf);

}



static const struct mmc_host_ops meson_mmc_ops = {

	.request	= meson_mmc_request,

	.set_ios	= meson_mmc_set_ios,
@@ -909,6 +921,7 @@ static const struct mmc_host_ops meson_mmc_ops = { 
	.pre_req	= meson_mmc_pre_req,

	.post_req	= meson_mmc_post_req,

	.execute_tuning = meson_mmc_execute_tuning,

	.card_busy	= meson_mmc_card_busy,

};



static int meson_mmc_probe(struct platform_device *pdev)