linux-kernel - Re: [PATCH v2] mmc: mediatek: enable SDIO IRQ low level trigger function

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Date:   Thu, 29 Aug 2019 15:36:28 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Yong Mao <yong.mao@...iatek.com>
Cc:     Chaotian Jing <chaotian.jing@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-mediatek@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        srv_heupstream <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v2] mmc: mediatek: enable SDIO IRQ low level trigger function

On Wed, 28 Aug 2019 at 11:45, Yong Mao <yong.mao@...iatek.com> wrote:
>
> From: yong mao <yong.mao@...iatek.com>
>
> 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@...iatek.com>
> Signed-off-by: Chaotian Jing <chaotian.jing@...iatek.com>

Applied for next, thanks!

Kind regards
Uffe

> ---
>  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..585f0c7 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 << 19)     /* 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
>