[PATCH 1/3] mmc: dw_mmc: use slot-gpio to handle cd pin

[Olof Johansson]

On Tue, Jan 14, 2014 at 7:58 AM, Kevin Hilman <khilman at linaro.org> wrote:
> On Thu, Jan 9, 2014 at 6:35 AM, Zhangfei Gao <zhangfei.gao at linaro.org> wrote:
>> Suggested by Jaehoon: Use slot-gpio to handle cd-gpio
>> Add function dw_mci_of_get_cd_gpio to check "cd-gpios" from dts.
>> mmc_gpio_request_cd and mmc_gpio_get_cd are used to handle cd pin
>>
>> Signed-off-by: Zhangfei Gao <zhangfei.gao at linaro.org>
>> Acked-by: Jaehoon Chung <jh80.chung at samsung.com>
>
> The Samsung Arndale board started failing boot from MMC root tests
> starting with next-20140113 and I bisected it down to this patch.
> Reverting this patch on top of next-20140114 gets Arndale booting
> again from MMC.  Is there some supporting DT data that's missing for
> Arndale?

Rather, it looks like this patch changes behaviour and no longer uses
dw_mci_get_cd() to find out if there's a card attached -- it switches
to rely only on GPIO (see the last chunk in the patch). That seems
broken?


-Olof