lkml.org 
[lkml]   [2015]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 17/23] sparc/time: Migrate to new 'set-state' interface
Date
Migrate sparc drivers 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.

We weren't doing anything which switching to few clockevent modes and so
their callbacks aren't implemented.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
arch/sparc/kernel/sun4m_smp.c | 2 +-
arch/sparc/kernel/time_32.c | 57 ++++++++++++++++++++-----------------------
arch/sparc/kernel/time_64.c | 33 ++++++++-----------------
3 files changed, 38 insertions(+), 54 deletions(-)

diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index d3408e72d20c..278c40abce82 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -247,7 +247,7 @@ void smp4m_percpu_timer_interrupt(struct pt_regs *regs)

ce = &per_cpu(sparc32_clockevent, cpu);

- if (ce->mode & CLOCK_EVT_MODE_PERIODIC)
+ if (clockevent_state_periodic(ce))
sun4m_clear_profile_irq(cpu);
else
sparc_config.load_profile_irq(cpu, 0); /* Is this needless? */
diff --git a/arch/sparc/kernel/time_32.c b/arch/sparc/kernel/time_32.c
index c9692f387cee..1affabc96b08 100644
--- a/arch/sparc/kernel/time_32.c
+++ b/arch/sparc/kernel/time_32.c
@@ -101,21 +101,18 @@ irqreturn_t notrace timer_interrupt(int dummy, void *dev_id)
return IRQ_HANDLED;
}

-static void timer_ce_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
+static int timer_ce_shutdown(struct clock_event_device *evt)
{
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- case CLOCK_EVT_MODE_RESUME:
- timer_ce_enabled = 1;
- break;
- case CLOCK_EVT_MODE_SHUTDOWN:
- timer_ce_enabled = 0;
- break;
- default:
- break;
- }
+ timer_ce_enabled = 0;
+ smp_mb();
+ return 0;
+}
+
+static int timer_ce_set_periodic(struct clock_event_device *evt)
+{
+ timer_ce_enabled = 1;
smp_mb();
+ return 0;
}

static __init void setup_timer_ce(void)
@@ -127,7 +124,9 @@ static __init void setup_timer_ce(void)
ce->name = "timer_ce";
ce->rating = 100;
ce->features = CLOCK_EVT_FEAT_PERIODIC;
- ce->set_mode = timer_ce_set_mode;
+ ce->set_state_shutdown = timer_ce_shutdown;
+ ce->set_state_periodic = timer_ce_set_periodic;
+ ce->tick_resume = timer_ce_set_periodic;
ce->cpumask = cpu_possible_mask;
ce->shift = 32;
ce->mult = div_sc(sparc_config.clock_rate, NSEC_PER_SEC,
@@ -183,24 +182,20 @@ static __init int setup_timer_cs(void)
}

#ifdef CONFIG_SMP
-static void percpu_ce_setup(enum clock_event_mode mode,
- struct clock_event_device *evt)
+static int percpu_ce_shutdown(struct clock_event_device *evt)
{
int cpu = cpumask_first(evt->cpumask);

- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- sparc_config.load_profile_irq(cpu,
- SBUS_CLOCK_RATE / HZ);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_UNUSED:
- sparc_config.load_profile_irq(cpu, 0);
- break;
- default:
- break;
- }
+ sparc_config.load_profile_irq(cpu, 0);
+ return 0;
+}
+
+static int percpu_ce_set_periodic(struct clock_event_device *evt)
+{
+ int cpu = cpumask_first(evt->cpumask);
+
+ sparc_config.load_profile_irq(cpu, SBUS_CLOCK_RATE / HZ);
+ return 0;
}

static int percpu_ce_set_next_event(unsigned long delta,
@@ -224,7 +219,9 @@ void register_percpu_ce(int cpu)
ce->name = "percpu_ce";
ce->rating = 200;
ce->features = features;
- ce->set_mode = percpu_ce_setup;
+ ce->set_state_shutdown = percpu_ce_shutdown;
+ ce->set_state_periodic = percpu_ce_set_periodic;
+ ce->set_state_oneshot = percpu_ce_shutdown;
ce->set_next_event = percpu_ce_set_next_event;
ce->cpumask = cpumask_of(cpu);
ce->shift = 32;
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index 2e6035c0a8ca..c69b21e51efc 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -674,32 +674,19 @@ static int sparc64_next_event(unsigned long delta,
return tick_ops->add_compare(delta) ? -ETIME : 0;
}

-static void sparc64_timer_setup(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- switch (mode) {
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_RESUME:
- break;
-
- case CLOCK_EVT_MODE_SHUTDOWN:
- tick_ops->disable_irq();
- break;
-
- case CLOCK_EVT_MODE_PERIODIC:
- case CLOCK_EVT_MODE_UNUSED:
- WARN_ON(1);
- break;
- }
+static int sparc64_timer_shutdown(struct clock_event_device *evt)
+{
+ tick_ops->disable_irq();
+ return 0;
}

static struct clock_event_device sparc64_clockevent = {
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = sparc64_timer_setup,
- .set_next_event = sparc64_next_event,
- .rating = 100,
- .shift = 30,
- .irq = -1,
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .set_state_shutdown = sparc64_timer_shutdown,
+ .set_next_event = sparc64_next_event,
+ .rating = 100,
+ .shift = 30,
+ .irq = -1,
};
static DEFINE_PER_CPU(struct clock_event_device, sparc64_events);

--
2.4.0


\
 
 \ /
  Last update: 2015-07-16 13:41    [W:0.220 / U:0.600 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site