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ANDROID: GKI: Enable SERIAL_8250_DW

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Enable support for designware quirks in the 8250 driver. This could be
built as a module, but if the 8250 earlycon driver is being used, doing
so causes problems at boot. When clk_unused_disable() disables the uart
clocks while the earlycon driver is using them, but before the full
driver loads to take over the clocks, the device will reboot.

This adds a relatively small amount of code to GKI so it should be
harmless, at least until a way is found to split the 8250 earlycon
support from the full driver.

Bug: 183963484
Change-Id: I6e54dfce347f546e954703af083a9c55cf2ddd88
Signed-off-by: Alistair Delva <adelva@google.com>
(cherry picked from commit 2c5e03c769614cd2a98e3bc22664b8766bc2b4c7)
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
This commit is contained in:
Alistair Delva 2021-03-29 15:41:43 -07:00 • committed by Giuliano Procida
parent acda6f3281
commit 069e12986f
2 changed files with 2 additions and 0 deletions
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1
arch/arm64/configs/gki_defconfig
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@ -317,6 +317,7 @@ CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_SERIAL_8250_EXAR is not set
CONFIG_SERIAL_8250_RUNTIME_UARTS=0
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_SERIAL_AMBA_PL011=y
CONFIG_SERIAL_AMBA_PL011_CONSOLE=y

1
arch/x86/configs/gki_defconfig
View file

@ -289,6 +289,7 @@ CONFIG_SERIAL_8250=y
# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_RUNTIME_UARTS=0
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_SERIAL_DEV_BUS=y
CONFIG_HW_RANDOM=y