[PATCH v3 0/2] phy: rockchip-emmc: fixes emmc-phy power on failed with rk3399 SoCs

[Caesar Wang]

Kishon,

Can you help merge this in your  or next tree?  I'm hoping that we can 
land this somewhere.:-)


Thanks,
-Caesar
在 2018年01月11日 10:40, Caesar Wang 写道:
> Hi Kishon,
>
> Since the Shawn isn't available, I take over this series patches for now.
>
> As the original bug had tracked on https://issuetracker.google.com/71561742.
> In some cases, the mmc phy power on failed during booting up.
> The log as below:
> ...
> [   2.375333] rockchip_emmc_phy_power: caldone timeout.
> [    2.377815] phy phy-ff770000.syscon:phy at f780.4: phy poweron failed --> -110
> ...
> [    2.489295] mmc0: mmc_select_hs400es failed, error -110
> [    2.489302] mmc0: error -110 whilst initialising MMC card
> ..
>
> The actual emulate, the wait 5us for calpad busy trimming, that's no enough.
> We need give the enough margin for it.
>
> Verified on url =
>          https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4
> This series patches can apply and bring up with kernel-next on rk3399 chromebook.
>
> -Caesar
>
>
> Changes in v3:
> - As Doug commented on both upstream and gerrit.
>    Change "5, 50" to "0, 50", and the message of print.
> - As Doug commented on https://patchwork.kernel.org/patch/10154797,
>    Change "1, 50" to "0, 50".
>
> Changes in v2:
> - print the return valut with regmap_read_poll_timeout failing.
> - As Brian commented on https://patchwork.kernel.org/patch/10139891/,
>    changed the note and added to print error value with
>    regmap_read_poll_timeout API.
>
> Shawn Lin (2):
>    phy: rockchip-emmc: retry calpad busy trimming
>    phy: rockchip-emmc: use regmap_read_poll_timeout to poll dllrdy
>
>   drivers/phy/rockchip/phy-rockchip-emmc.c | 60 +++++++++++++++-----------------
>   1 file changed, 28 insertions(+), 32 deletions(-)
>