Dear Andy Fleming,
On 1 September 2011 10:23, Andy Fleming <aflem...@gmail.com> wrote:
> On Tue, Aug 30, 2011 at 5:55 AM, Chander Kashyap
> <chander.kash...@linaro.org> wrote:
>> mmc data transfer width is set as following:
>> WIDE8[5]:
>> 0 = Depend on WIDE4
>> 1 = 8-bit mode
>> WIDE4[1]:
>> 1 = 4-bit mode
>> 0 = 1-bit mode
>>
>> In case of 4-bit mode reset 8-bit mode and
>> in case of 1-bit mode reset 8-bit mode and 4-bit mode
>>
>> Signed-off-by: Chander Kashyap <chander.kash...@linaro.org>
>> ---
>> drivers/mmc/s5p_mmc.c | 10 +++++++---
>> 1 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/mmc/s5p_mmc.c b/drivers/mmc/s5p_mmc.c
>> index 7786ecf..6e6ad08 100644
>> --- a/drivers/mmc/s5p_mmc.c
>> +++ b/drivers/mmc/s5p_mmc.c
>> @@ -368,12 +368,16 @@ static void mmc_set_ios(struct mmc *mmc)
>> * 1 = 4-bit mode
>> * 0 = 1-bit mode
>> */
>> - if (mmc->bus_width == 8)
>> + if (mmc->bus_width == 8) {
>> ctrl |= (1 << 5);
>> - else if (mmc->bus_width == 4)
>> + ctrl &= ~(1 << 1);
>
>
> I know these were like this before, but those numbers are awfully
> magical. You should really define constants for them.
We decided to use comments instead of defines.
>
> Also, this seems like a very confusing way to do this? Why not clear
> both bits at the start, and then set the one that is needed?
Agreed.
Thanks
Minkyu Kang
--
from. prom.
www.promsoft.net
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
