diff options
Diffstat (limited to 'arch/arm/kernel/smp_twd.c')
| -rw-r--r-- | arch/arm/kernel/smp_twd.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index fef42b21cec..33e4a0456c3 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -33,6 +33,9 @@ static void __iomem *twd_base; static struct clk *twd_clk; static unsigned long twd_timer_rate; +static DEFINE_PER_CPU(u32, twd_ctrl); +static DEFINE_PER_CPU(u32, twd_load); + static struct clock_event_device __percpu **twd_evt; static int twd_ppi; @@ -345,3 +348,24 @@ out: WARN(err, "twd_local_timer_of_register failed (%d)\n", err); } #endif + +#if defined(CONFIG_HOTPLUG) || defined(CONFIG_CPU_IDLE) +void twd_save(void) +{ + int this_cpu = smp_processor_id(); + + per_cpu(twd_ctrl, this_cpu) = __raw_readl(twd_base + TWD_TIMER_CONTROL); + per_cpu(twd_load, this_cpu) = __raw_readl(twd_base + TWD_TIMER_LOAD); + +} + +void twd_restore(void) +{ + int this_cpu = smp_processor_id(); + + __raw_writel(per_cpu(twd_ctrl, this_cpu), + twd_base + TWD_TIMER_CONTROL); + __raw_writel(per_cpu(twd_load, this_cpu), + twd_base + TWD_TIMER_LOAD); +} +#endif |