Re: [PATCH] mmc: sdhci-esdhc-imx: correct the max timeout count

[Dong Aisheng <dongas86@gmail.com>]

On Mon, Aug 15, 2016 at 04:31:33PM +0800, Haibo Chen wrote:
> i.MX USDHC Reference Manual has a mistake, for the register SYS_CTRL,
> the DTOCV(bit 19~16) means the data timeout counter value. When DTOCV
> is set to 0xF, it means SDCLK << 29, not SDCLK << 28.
> 
> Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
> ---
>  drivers/mmc/host/sdhci-esdhc-imx.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 437c448..ea7d086 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -929,7 +929,7 @@ static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host)
>  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>  	struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
>  

Better add a comment here like:
	/* Doc Errata: the uSDHC actual maximum timeout count is 1 << 29 */

> -	return esdhc_is_usdhc(imx_data) ? 1 << 28 : 1 << 27;
> +	return esdhc_is_usdhc(imx_data) ? 1 << 29 : 1 << 27;

Otherwise:
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>

Regards
Dong Aisheng

>  }
>  
>  static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
> -- 
> 1.9.1
> 
> --
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