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Commit fa50448d authored by Martin Wu's avatar Martin Wu
Browse files

ANDROID: GKI: enable CONFIG_SUN4I_TIMER 



Allwinner's SoC timer driver (timer-sun4i.c) has to be built-in rather
than modularized for the following limitations in linux timer framework:
1. tick broadcast installed by insmod cannot switch to oneshot mode
   correctly
2. cpus cannot enter cpuidle state due to the issue above.
3. rcu warnings will appear if we forcibly re-enable tick-broadcast
   for each cpu when new tick broadcast device is installed by insmod
   (timer-sun4i.c in our case)

Bug: 173667601
Change-Id: If077db348c027ec02549e25eee3e17c2cc429644
Signed-off-by: default avatarMartin Wu <wuyan@allwinnertech.com>
parent 034d5a95

arch/arm64/configs/gki_defconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -445,6 +445,7 @@ CONFIG_COMMON_CLK_SCPI=y 
# CONFIG_CLK_SUNXI is not set

# CONFIG_CLK_SUNXI is not set

# CONFIG_SUNXI_CCU is not set

# CONFIG_SUNXI_CCU is not set

CONFIG_HWSPINLOCK=y

CONFIG_HWSPINLOCK=y

CONFIG_SUN4I_TIMER=y

# CONFIG_SUN50I_ERRATUM_UNKNOWN1 is not set

# CONFIG_SUN50I_ERRATUM_UNKNOWN1 is not set

CONFIG_MTK_TIMER=y

CONFIG_MTK_TIMER=y

CONFIG_MAILBOX=y

CONFIG_MAILBOX=y

drivers/clocksource/Kconfig

+1 −1
Original line number Original line Diff line number Diff line
@@ -127,7 +127,7 @@ config RDA_TIMER 
	  Enables the support for the RDA Micro timer driver.

	  Enables the support for the RDA Micro timer driver.





config SUN4I_TIMER

config SUN4I_TIMER

	bool "Sun4i timer driver" if COMPILE_TEST

	bool "Sun4i timer driver"

	depends on HAS_IOMEM

	depends on HAS_IOMEM

	select CLKSRC_MMIO

	select CLKSRC_MMIO

	select TIMER_OF

	select TIMER_OF