linux-kernel - [PATCH 19/41] clocksource: samsung_pwm: Migrate to new 'set-state' interface

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Message-Id: <cd88ba399d67eb6781f409430876fbc9a27d5d54.1434622147.git.viresh.kumar@linaro.org>
Date:	Thu, 18 Jun 2015 16:24:33 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Tomasz Figa <tfiga@...omium.org>, Kukjin Kim <kgene@...nel.org>
Subject: [PATCH 19/41] clocksource: samsung_pwm: Migrate to new 'set-state' interface

Migrate samsung_pwm 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: Tomasz Figa <tfiga@...omium.org>
Cc: Kukjin Kim <kgene@...nel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/clocksource/samsung_pwm_timer.c | 41 +++++++++++++++------------------
 1 file changed, 19 insertions(+), 22 deletions(-)

diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
index 5645cfc90c41..bc90e13338cc 100644
--- a/drivers/clocksource/samsung_pwm_timer.c
+++ b/drivers/clocksource/samsung_pwm_timer.c
@@ -207,25 +207,18 @@ static int samsung_set_next_event(unsigned long cycles,
 	return 0;
 }
 
-static void samsung_set_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt)
+static int samsung_shutdown(struct clock_event_device *evt)
 {
 	samsung_time_stop(pwm.event_id);
+	return 0;
+}
 
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		samsung_time_setup(pwm.event_id, pwm.clock_count_per_tick - 1);
-		samsung_time_start(pwm.event_id, true);
-		break;
-
-	case CLOCK_EVT_MODE_ONESHOT:
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_RESUME:
-		break;
-	}
+static int samsung_set_periodic(struct clock_event_device *evt)
+{
+	samsung_time_stop(pwm.event_id);
+	samsung_time_setup(pwm.event_id, pwm.clock_count_per_tick - 1);
+	samsung_time_start(pwm.event_id, true);
+	return 0;
 }
 
 static void samsung_clockevent_resume(struct clock_event_device *cev)
@@ -240,12 +233,16 @@ static void samsung_clockevent_resume(struct clock_event_device *cev)
 }
 
 static struct clock_event_device time_event_device = {
-	.name		= "samsung_event_timer",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.rating		= 200,
-	.set_next_event	= samsung_set_next_event,
-	.set_mode	= samsung_set_mode,
-	.resume		= samsung_clockevent_resume,
+	.name			= "samsung_event_timer",
+	.features		= CLOCK_EVT_FEAT_PERIODIC |
+				  CLOCK_EVT_FEAT_ONESHOT,
+	.rating			= 200,
+	.set_next_event		= samsung_set_next_event,
+	.set_state_shutdown	= samsung_shutdown,
+	.set_state_periodic	= samsung_set_periodic,
+	.set_state_oneshot	= samsung_shutdown,
+	.tick_resume		= samsung_shutdown,
+	.resume			= samsung_clockevent_resume,
 };
 
 static irqreturn_t samsung_clock_event_isr(int irq, void *dev_id)
-- 
2.4.0

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