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mmc: mediatek: enable SDIO IRQ low level trigger function

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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: Yong Mao <yong.mao@mediatek.com>
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
yong mao 2019-08-28 17:45:24 +08:00 committed by Ulf Hansson
parent 7353788c6a
commit 26c71a13a8
1 changed files with 2 additions and 0 deletions
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2
drivers/mmc/host/mtk-sd.c
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@ -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);