[U-Boot] [PATCH 2/2] sunxi: Enable MMC new mode for A83T

[Jagan Teki]

On Mon, Aug 28, 2017 at 2:15 PM, Maxime Ripard
<maxime.ripard at free-electrons.com> wrote:
> On Mon, Aug 28, 2017 at 04:12:15PM +0800, Chen-Yu Tsai wrote:
>> On Mon, Aug 28, 2017 at 4:05 PM, Jagan Teki <jagannadh.teki at gmail.com> wrote:
>> > On Mon, Aug 28, 2017 at 12:29 PM, Maxime Ripard
>> > <maxime.ripard at free-electrons.com> wrote:
>> >> Hi Jagan,
>> >>
>> >> On Sat, Aug 26, 2017 at 12:11:23PM +0530, Jagan Teki wrote:
>> >>> On Wed, Aug 23, 2017 at 3:33 PM, Maxime Ripard
>> >>> <maxime.ripard at free-electrons.com> wrote:
>> >>> > The eMMC controller for the A83T uses the new operating mode. Enable it.
>> >>> >
>> >>> > Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
>> >>>
>> >>> Reviewed-by: Jagan Teki <jagan at openedev.com>
>> >>
>> >> I think both these patches should be merged in the upcoming
>> >> release. It's a fix for a usecase that already exists (we already
>> >> enable the eMMC on A83T), and it's unusable on some boards without it.
>> >
>> > But none of A83T boards were not enable eMMC yet? even sun8i-a83t.dtsi
>> > still need to add node. May be we can wait once all add?
>>
>> The sunxi-mmc driver does not use the device tree.
>>
>> One only needs to set CONFIG_MMC_SUNXI_SLOT_EXTRA=2 to use the eMMC.
>> And yes, eMMC is broken on some boards unless the new timing mode is
>> used.
>
> And the support is broken until "mmc: sunxi: fix legacy MMC
> initialisation" in my other serie is applied.

With these patches, eMMC detected BPI-M3. But none of A83T boards have
CONFIG_MMC_SUNXI_SLOT_EXTRA=2 So it's better to take this once boards
added.

thanks!
-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.