Commit 26c71a13 authored by yong mao's avatar yong mao Committed by Ulf Hansson
Browse files

mmc: mediatek: enable SDIO IRQ low level trigger function 



SDIO IRQ is not defaultly triggered by low level,
but by falling edge. It needs to set related register
to enable SDIO IRQ low level trigger function.
Otherwise the SDIO IRQ may be lost in some specail condition.

Signed-off-by: default avatarYong Mao <yong.mao@mediatek.com>
Signed-off-by: default avatarChaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 7353788c

drivers/mmc/host/mtk-sd.c

+2 −0
Original line number Diff line number Diff line
@@ -192,6 +192,7 @@ 
#define SDC_STS_CMDBUSY         (0x1 << 1)	/* RW */

#define SDC_STS_SWR_COMPL       (0x1 << 31)	/* RW */



#define SDC_DAT1_IRQ_TRIGGER	(0x1 << 19)	/* RW */

/* SDC_ADV_CFG0 mask */

#define SDC_RX_ENHANCE_EN	(0x1 << 20)	/* RW */
@@ -1577,6 +1578,7 @@ static void msdc_init_hw(struct msdc_host *host) 


	/* Config SDIO device detect interrupt function */

	sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);

	sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);



	/* Configure to default data timeout */

	sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);

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