[PATCH] mmc: mediatek: enable SDIO IRQ low level trigger function
From: Yong Mao <hidden>
Date: 2019-08-28 09:07:25
Also in:
linux-mediatek, linux-mmc, lkml
Subsystem:
mediatek mmc/sd/sdio driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Chaotian Jing, Ulf Hansson, Linus Torvalds
From: yong mao <redacted> 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 <redacted> Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com> --- drivers/mmc/host/mtk-sd.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 33f4b63..2444268 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c@@ -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 << 20) /* RW */ /* SDC_ADV_CFG0 mask */ #define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
@@ -1568,6 +1569,7 @@ 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);
--
1.9.1
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