Commit 43b4e094 authored by Miaoqing Pan's avatar Miaoqing Pan Committed by Zhihong Yu
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CHROMIUM: WAR: ath10k: fix PCIE wake up failed



Observed PCIE device wake up failed after ~120 iterations of
soft-reboot test. The error message is
"ath10k_pci 0000:01:00.0: failed to wake up device : -110"

The call trace as below:
ath10k_pci_probe -> ath10k_pci_force_wake -> ath10k_pci_wake_wait ->
ath10k_pci_is_awake

Once trigger the device to wake up, we will continuously check the RTC
state until it returns RTC_STATE_V_ON or timeout.

But for QCA99x0 chips, we use wrong value for RTC_STATE_V_ON.
Occasionally, we get 0x7 on the fist read, we thought as a failure
case, but actually is the right value, also verified with the spec.
So fix the issue by changing RTC_STATE_V_ON from 0x5 to 0x7, passed
~2000 iterations.

Tested HW: QCA9984

BUG=b:129985348
TEST=Compilation, basic wifi sanity tests and ~2000 iterations of reboot

Change-Id: Ia3c853b0c2d52772a5082ebdbae0a506926cab43
Signed-off-by: default avatarMiaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: default avatarTamizh chelvam <tamizhr@codeaurora.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1631919


Reviewed-by: default avatarZhihong Yu <zhihongyu@chromium.org>
Commit-Queue: Zhihong Yu <zhihongyu@chromium.org>
Tested-by: default avatarZhihong Yu <zhihongyu@chromium.org>
parent d04238fd
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