linux-kernel - Re: [PATCH v6 3/3] mmc: dw_mmc: Set timeout to max upon resume

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Date:	Fri, 23 Aug 2013 21:56:27 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Chris Ball <cjb@...top.org>, Seungwon Jeon <tgih.jun@...sung.com>,
	James Hogan <james.hogan@...tec.com>,
	Grant Grundler <grundler@...omium.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Abhilash Kesavan <a.kesavan@...sung.com>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Olof Johansson <olof@...om.net>, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 3/3] mmc: dw_mmc: Set timeout to max upon resume

Acked-by: Jaehoon Chung <jh80.chung@...sung.com>

On 08/23/2013 01:19 AM, Doug Anderson wrote:
> The TMOUT register is initted to 0xffffffff at probe time but isn't
> initted after suspend/resume.  Add an init of this value.
> 
> No problems were observed without this (it will also get initted in
> __dw_mci_start_request if there is data to send), but it makes the
> register dump before and after suspend cleaner.
> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> Acked-by: Seungwon Jeon <tgih.jun@...sung.com>
> Reviewed-by: Tomasz Figa <t.figa@...sung.com>
> ---
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/mmc/host/dw_mmc.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index f6c7545..6a9a846 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -2506,6 +2506,9 @@ int dw_mci_resume(struct dw_mci *host)
>  	/* Restore the old value at FIFOTH register */
>  	mci_writel(host, FIFOTH, host->fifoth_val);
>  
> +	/* Put in max timeout */
> +	mci_writel(host, TMOUT, 0xFFFFFFFF);
> +
>  	mci_writel(host, RINTSTS, 0xFFFFFFFF);
>  	mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
>  		   SDMMC_INT_TXDR | SDMMC_INT_RXDR |
> 

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