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

--
2.7.4

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