Hi,
On 05/06/2015 10:33 AM, zhangfei wrote:
>
>
> On 05/06/2015 09:26 AM, Jaehoon Chung wrote:
>> Hi,
>>
>> On 05/06/2015 10:14 AM, Zhangfei Gao wrote:
>>> On 6 May 2015 at 08:36, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote:
>>>> Hi, Zhangfei.
>>>>
>>>> If you want to check it, use the "broken-cd" and "non-removable" properties into dt-file.
>>>> Did you use them?
>>>
>>> Yes.
>>> "broken-cd" can work, but mmc_rescan keeps running.
>>> "non-removable" does NOT work, which should be used for emmc.
>>> Since dw_mci_get_cd only checks DW_MCI_QUIRK_BROKEN_CARD_DETECTION, so
>>> only checks "broken-cd" but not check "non-removable"
>>
>> Did you use the usage like the below..
>>
>> dwmmc0 {
>> non-removable;
>> broken-cd;
>> };
>
> non-removable and broken-cd should be used only one.
Did you check the code?
If non-removable is set, broken-cd should be discarded.
I think that the below usage is not "must not".
Best Regards,
Jaehoon Chung
>
> Documentation/devicetree/bindings/mmc/mmc.txt
> Card detection:
> If no property below is supplied, host native card detect is used.
> Only one of the properties in this section should be supplied:
> - broken-cd: There is no card detection available; polling must be used.
> - cd-gpios: Specify GPIOs for card detection, see gpio binding
> - non-removable: non-removable slot (like eMMC); assume always present.
>
> work
> dwmmc0 {
> broken-cd;
> };
>
> NOT work
> dwmmc0 {
> non-removable;
> };
>
> Thanks
>
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