[PATCH] mmc: mtk-sd: implement waiting for DAT0 line state

[Tom Rini]

On Fri, Nov 05, 2021 at 02:34:14PM +0100, Julien Masson wrote:

> With the recent changes on mmc driver, we saw that the boot is ~5 secs
> longer compared to v2021.07 on mediatek platforms.
> 
> This regression is seen during mmc_init and caused by the following
> patch [1].
> 
> Indeed since we did not support poll dat0, we fulfilled the condition
> of [1] and a delay of 500 ms was added for every __mmc_switch call.
> 
> By adding the support of wait_dat0(), we now don't need to mdelay
> during mmc_init anymore.
> 
> [1]: https://patchwork.ozlabs.org/project/uboot/patch/1629192034-64056-1-git-send-email-ye.li@nxp.com/
> 
> Signed-off-by: Julien Masson <jmasson at baylibre.com>
> Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>

Applied to u-boot/next, thanks!

-- 
Tom
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