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| author |  Benjamin Gaignard <benjamin.gaignard@linaro.org>
| 2020-06-03 14:54:38 +0200 |
|---|---|---|
| committer |  Lee Jones <lee.jones@linaro.org>
| 2020-06-18 11:19:58 +0100 |
| commit | 48b41c5e2de6c52c90efa99cfa122a5da7a7f0cd (patch) | |
| tree | 35e036084868392836b0ef3d3621d6c410c7684b /drivers/clocksource/Kconfig | |
| parent | mfd: stm32: Enable regmap fast_io for stm32-lptimer (diff) | |
| download | linux-48b41c5e2de6c52c90efa99cfa122a5da7a7f0cd.tar.gz linux-48b41c5e2de6c52c90efa99cfa122a5da7a7f0cd.tar.bz2 linux-48b41c5e2de6c52c90efa99cfa122a5da7a7f0cd.zip | |
clocksource: Add Low Power STM32 timers driver
Implement clock event driver using low power STM32 timers.
Low power timer counters running even when CPUs are stopped.
It could be used as clock event broadcaster to wake up CPUs but not like
a clocksource because each it rise an interrupt the counter restart from 0.
Low power timers have a 16 bits counter and a prescaler which allow to
divide the clock per power of 2 to up 128 to target a 32KHz rate.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Pascal Paillet <p.paillet@st.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 91418381fcd4..be49123b088a 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -291,6 +291,10 @@ config CLKSRC_STM32 select CLKSRC_MMIO select TIMER_OF +config CLKSRC_STM32_LP + bool "Low power clocksource for STM32 SoCs" + depends on MFD_STM32_LPTIMER || COMPILE_TEST + config CLKSRC_MPS2 bool "Clocksource for MPS2 SoCs" if COMPILE_TEST depends on GENERIC_SCHED_CLOCK |