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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index caf40ad0bbc6..e0cd2baa8380 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -126,6 +126,7 @@ enum cpuhp_state {
         CPUHP_AP_MIPS_GIC_TIMER_STARTING,
         CPUHP_AP_ARC_TIMER_STARTING,
         CPUHP_AP_RISCV_TIMER_STARTING,
+        CPUHP_AP_CSKY_TIMER_STARTING,
         CPUHP_AP_KVM_STARTING,
         CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
         CPUHP_AP_KVM_ARM_VGIC_STARTING,