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

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On 16/08/16 10:44, Dong Aisheng wrote:
> 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@xxxxxxx>
>> ---
>>  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@xxxxxxx>

Please take account of Dong's comment, otherwise:

Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>

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