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ANDROID: GKI: enable CONFIG_SUN4I_TIMER

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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: Martin Wu <wuyan@allwinnertech.com>
This commit is contained in:
Martin Wu
2020-11-13 17:51:09 +08:00
parent 6be666e945
commit ef3d936077
2 changed files with 2 additions and 1 deletions
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1
arch/arm64/configs/gki_defconfig
View File

@@ -451,6 +451,7 @@ CONFIG_COMMON_CLK_SCPI=y
# CONFIG_CLK_SUNXI is not set
# CONFIG_SUNXI_CCU is not set
CONFIG_HWSPINLOCK=y
CONFIG_SUN4I_TIMER=y
# CONFIG_SUN50I_ERRATUM_UNKNOWN1 is not set
CONFIG_MAILBOX=y
CONFIG_IOMMU_LIMIT_IOVA_ALIGNMENT=y

2
drivers/clocksource/Kconfig
View File

@@ -126,7 +126,7 @@ config RDA_TIMER
Enables the support for the RDA Micro timer driver.
config SUN4I_TIMER
bool "Sun4i timer driver" if COMPILE_TEST
bool "Sun4i timer driver"
depends on HAS_IOMEM
select CLKSRC_MMIO
select TIMER_OF