linux-kernel - Re: [PATCH] mmc: mxs-mmc: Add support for non-removable cards

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Message-ID: <20130405091352.GC2667@S2101-09.ap.freescale.net>
Date:	Fri, 5 Apr 2013 17:13:55 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
CC:	<cjb@...top.org>, <marex@...x.de>, <fabio.estevam@...escale.com>,
	<otavio@...ystems.com.br>, <broonie@...nsource.wolfsonmicro.com>,
	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: mxs-mmc: Add support for non-removable cards

On Fri, Apr 05, 2013 at 01:18:38AM -0300, Alexandre Pereira da Silva wrote:
> Some boards and card slots doesn't have card detect feature available.
> In that case allow to mark the cards as non-removable, via devicetree.
> 
> Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>

Marc already sent a similar patch[1] for that.

Shawn

[1] http://thread.gmane.org/gmane.linux.kernel.mmc/19823/focus=19825

> ---
>  drivers/mmc/host/mxs-mmc.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
> index 4efe302..7d2cd74 100644
> --- a/drivers/mmc/host/mxs-mmc.c
> +++ b/drivers/mmc/host/mxs-mmc.c
> @@ -95,6 +95,9 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
>  	struct mxs_mmc_host *host = mmc_priv(mmc);
>  	struct mxs_ssp *ssp = &host->ssp;
>  
> +	if (mmc->caps & MMC_CAP_NONREMOVABLE)
> +		return 1;
> +
>  	return !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
>  		 BM_SSP_STATUS_CARD_DETECT);
>  }
> @@ -691,6 +694,9 @@ static int mxs_mmc_probe(struct platform_device *pdev)
>  	if (flags & OF_GPIO_ACTIVE_LOW)
>  		host->wp_inverted = 1;
>  
> +	if (of_find_property(np, "non-removable", NULL))
> +		mmc->caps |= MMC_CAP_NONREMOVABLE;
> +
>  	mmc->f_min = 400000;
>  	mmc->f_max = 288000000;
>  	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
> -- 
> 1.7.10
> 

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