diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2018-11-02 17:51:28 +0100 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2018-11-02 19:39:54 +0100 |
| commit | a7ad38b0dd3c1ba8d6e5a55241e875e9db8331ab (patch) | |
| tree | 0f483b5ab011fdfd20ba675d0a67100c5ad171fa /drivers/clocksource/Kconfig | |
| parent | Merge tag 'for-linus-20180929' of git://git.kernel.dk/linux-block (diff) | |
| download | linux-a7ad38b0dd3c1ba8d6e5a55241e875e9db8331ab.tar.xz linux-a7ad38b0dd3c1ba8d6e5a55241e875e9db8331ab.zip | |
clocksource/drivers/c-sky: Add C-SKY SMP timer
The driver is for C-SKY SMP timer. It only supports oneshot event
and 32bit overflow for clocksource. Per cpu core has one timer and
all timers share one clock-counter-input from the same clocksource.
This use mfcr&mtcr instructions to access the regs.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource/Kconfig')
| -rw-r--r-- | drivers/clocksource/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index a11f4ba98b05..591c9a8649a5 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -620,4 +620,14 @@ config RISCV_TIMER is accessed via both the SBI and the rdcycle instruction. This is required for all RISC-V systems. +config CSKY_MP_TIMER + bool "SMP Timer for the C-SKY platform" if COMPILE_TEST + depends on CSKY + select TIMER_OF + help + Say yes here to enable C-SKY SMP timer driver used for C-SKY SMP + system. + csky,mptimer is not only used in SMP system, it also could be used + single core system. It's not a mmio reg and it use mtcr/mfcr instruction. + endmenu |