linux-kernel - Re: [PATCH] mmc: dw_mmc: Fix DDR mode support.

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Message-ID: <CAFbHwiT3p3pSC1q4xQRYkLzSG7tPuGLXB4KKwC-8HWMmtF+fhA@mail.gmail.com>
Date:	Fri, 5 Aug 2011 11:20:42 +0100
From:	Will Newton <will.newton@...il.com>
To:	Seungwon Jeon <tgih.jun@...sung.com>
Cc:	linux-mmc@...r.kernel.org, cjb@...top.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: dw_mmc: Fix DDR mode support.

On Fri, Aug 5, 2011 at 4:35 AM, Seungwon Jeon <tgih.jun@...sung.com> wrote:
> Host driver can't get a hint of DDR mode through ios->ddr flag anymore.
> ios->timing is currently used to inform DDR mode as a substitute.
> And capability of MMC_CAP_MMC_HIGHSPEED is added for DDR support.
>
> Signed-off-by: Seungwon Jeon <tgih.jun@...sung.com>
> ---
>  drivers/mmc/host/dw_mmc.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index d65511e..b412a1d 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -699,7 +699,7 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
>        }
>
>        /* DDR mode set */
> -       if (ios->ddr) {
> +       if (ios->timing == MMC_TIMING_UHS_DDR50) {
>                regs = mci_readl(slot->host, UHS_REG);
>                regs |= (0x1 << slot->id) << 16;
>                mci_writel(slot->host, UHS_REG, regs);
> @@ -1646,7 +1646,7 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
>                        mmc->caps |= MMC_CAP_4_BIT_DATA;
>
>        if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED)
> -               mmc->caps |= MMC_CAP_SD_HIGHSPEED;
> +               mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
>
>  #ifdef CONFIG_MMC_DW_IDMAC
>        mmc->max_segs = host->ring_size;
> --
> 1.7.0.4

Acked-by: Will Newton <will.newton@...tec.com>
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