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authorViresh Kumar <viresh.kumar@linaro.org>2015-02-27 13:39:52 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2015-07-17 08:22:11 +0530
commit5e2535710ee3fa2807406ea75eb4381f85b29b0b (patch)
tree9f848aa70bd7f44bd9ea540b5ce310e80ff44e2d /arch/arm/kernel/smp_twd.c
parentbc0195aad0daa2ad5b0d76cce22b167bc3435590 (diff)
ARM/smp_twd: Migrate to new 'set-state' interface
Migrate smp_twd driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'arch/arm/kernel/smp_twd.c')
-rw-r--r--arch/arm/kernel/smp_twd.c48
1 files changed, 26 insertions, 22 deletions
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 172c6a05d27f..e9035cda1485 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -36,29 +36,30 @@ static DEFINE_PER_CPU(bool, percpu_setup_called);
static struct clock_event_device __percpu *twd_evt;
static int twd_ppi;
-static void twd_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk)
+static int twd_shutdown(struct clock_event_device *clk)
{
- unsigned long ctrl;
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- ctrl = TWD_TIMER_CONTROL_ENABLE | TWD_TIMER_CONTROL_IT_ENABLE
- | TWD_TIMER_CONTROL_PERIODIC;
- writel_relaxed(DIV_ROUND_CLOSEST(twd_timer_rate, HZ),
- twd_base + TWD_TIMER_LOAD);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* period set, and timer enabled in 'next_event' hook */
- ctrl = TWD_TIMER_CONTROL_IT_ENABLE | TWD_TIMER_CONTROL_ONESHOT;
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- default:
- ctrl = 0;
- }
+ writel_relaxed(0, twd_base + TWD_TIMER_CONTROL);
+ return 0;
+}
+static int twd_set_oneshot(struct clock_event_device *clk)
+{
+ /* period set, and timer enabled in 'next_event' hook */
+ writel_relaxed(TWD_TIMER_CONTROL_IT_ENABLE | TWD_TIMER_CONTROL_ONESHOT,
+ twd_base + TWD_TIMER_CONTROL);
+ return 0;
+}
+
+static int twd_set_periodic(struct clock_event_device *clk)
+{
+ unsigned long ctrl = TWD_TIMER_CONTROL_ENABLE |
+ TWD_TIMER_CONTROL_IT_ENABLE |
+ TWD_TIMER_CONTROL_PERIODIC;
+
+ writel_relaxed(DIV_ROUND_CLOSEST(twd_timer_rate, HZ),
+ twd_base + TWD_TIMER_LOAD);
writel_relaxed(ctrl, twd_base + TWD_TIMER_CONTROL);
+ return 0;
}
static int twd_set_next_event(unsigned long evt,
@@ -94,7 +95,7 @@ static void twd_timer_stop(void)
{
struct clock_event_device *clk = raw_cpu_ptr(twd_evt);
- twd_set_mode(CLOCK_EVT_MODE_UNUSED, clk);
+ twd_shutdown(clk);
disable_percpu_irq(clk->irq);
}
@@ -296,7 +297,10 @@ static void twd_timer_setup(void)
clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_C3STOP;
clk->rating = 350;
- clk->set_mode = twd_set_mode;
+ clk->set_state_shutdown = twd_shutdown;
+ clk->set_state_periodic = twd_set_periodic;
+ clk->set_state_oneshot = twd_set_oneshot;
+ clk->tick_resume = twd_shutdown;
clk->set_next_event = twd_set_next_event;
clk->irq = twd_ppi;
clk->cpumask = cpumask_of(cpu);