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| author | Vineet Gupta <vgupta@synopsys.com> | 2016-10-31 13:46:38 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-11-30 11:54:25 -0800 |
| commit | c4c9a040ecb7297e011e579f5a9cc280e42d725f (patch) | |
| tree | a62aff3aba526fea0ccbff23f76bfa88f319dd8d /drivers/clocksource/Kconfig | |
| parent | b26c2e3823bae6ba43a2b263d9bb75a3efd39b6a (diff) | |
| download | op-kernel-dev-c4c9a040ecb7297e011e579f5a9cc280e42d725f.zip op-kernel-dev-c4c9a040ecb7297e011e579f5a9cc280e42d725f.tar.gz | |
clocksource: import ARC timer driver
This adds support for
- CONFIG_ARC_TIMERS : legacy 32-bit TIMER0 and TIMER1 which count UP
from @CNT to @LIMIT, before optionally triggering an interrupt.
These are programmed using ARC auxiliary register interface.
These are present in all ARC cores (ARC700 and ARC HS38)
TIMER0 serves as clockevent for all ARC linux builds.
TIMER1 is used for clocksource in arc700 builds.
- CONFIG_ARC_TIMERS_64BIT: 64-bit counters, RTC and GFRC found in
ARC HS38 cores. These are independnet IP blocks with different
programming model respectively.
Link: http://lkml.kernel.org/r/20161111231132.GA4186@mai
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index e2c6e43..4866f7a 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -282,6 +282,26 @@ config CLKSRC_MPS2 select CLKSRC_MMIO select CLKSRC_OF +config ARC_TIMERS + bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST + depends on GENERIC_CLOCKEVENTS + select CLKSRC_OF + help + These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC cores + (ARC700 as well as ARC HS38). + TIMER0 serves as clockevent while TIMER1 provides clocksource + +config ARC_TIMERS_64BIT + bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST + depends on GENERIC_CLOCKEVENTS + depends on ARC_TIMERS + select CLKSRC_OF + help + This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for SMP) + RTC is implemented inside the core, while GFRC sits outside the core in + ARConnect IP block. Driver automatically picks one of them for clocksource + as appropriate. + config ARM_ARCH_TIMER bool select CLKSRC_OF if OF |
