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mediatek: Use the 64-bit timer

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GPT4 is a 32-bit timer and the counter of GPT4 will overflow in about
330 seconds (0xffffffff / 13MHz). Timer and delay functions will not
work properly if the counter overflows. To fix that we should use the
64-bit timer (GPT6).

BUG=b:80501386
BRANCH=none
Test=emerge-elm coreboot; emerge-kukui coreboot

Change-Id: I9f080e47253a1b1bab4636a45cb86c8666a25302
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32245
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: You-Cheng Syu <youcheng@google.com>
This commit is contained in:
Tristan Shieh
2019-04-08 11:01:40 +08:00
committed by Julius Werner
parent 250dfc0256
commit a76e6542d1
4 changed files with 35 additions and 18 deletions
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5
payloads/libpayload/drivers/timer/Kconfig
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@ -54,7 +54,7 @@ config TIMER_IMG_PISTACHIO
bool "Timer for IMG Pistachio"
config TIMER_MTK
bool "Timer for MediaTek MT8173"
bool "Timer for MediaTek"
endchoice
@ -77,7 +77,7 @@ config TIMER_GENERIC_REG
default 0x004A2000 if TIMER_IPQ40XX
default 0x0200A028 if TIMER_IPQ806X
default 0x101C0100 if TIMER_MCT
default 0x10008048 if TIMER_MTK
default 0x10008068 if TIMER_MTK
default 0xff810028 if TIMER_RK3288
default 0xff850008 if TIMER_RK3399
default 0x60005010 if TIMER_TEGRA_1US
@ -89,6 +89,7 @@ config TIMER_GENERIC_HIGH_REG
hex "Generic Timer High Register Address"
default 0x004A2004 if TIMER_IPQ40XX
default 0x101C0104 if TIMER_MCT
default 0x10008078 if TIMER_MTK
default 0xff81002C if TIMER_RK3288
default 0xff85000C if TIMER_RK3399
default 0x0