[17/21] clocksource/drivers/timer-ti-dm: Add support to get pwm current status
diff mbox series

Message ID 20200318174131.20582-17-daniel.lezcano@linaro.org
State Accepted
Commit 92fd86864ec4ac089de47f0f1f4c47418b343448
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Series
  • [01/21] clocksource/drivers/fttmr010: Parametrise shutdown
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Commit Message

Daniel Lezcano March 18, 2020, 5:41 p.m. UTC
From: Lokesh Vutla <lokeshvutla@ti.com>

omap_dm_timer_ops provide support to configure the pwm but there is no
support to get the current status. For configuring pwm it is advised to
check the current hw status instead of relying on pwm framework. So
implement a new timer ops to get the current status of pwm.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Tony Lindgen <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200305082715.15861-6-lokeshvutla@ti.com
---
 drivers/clocksource/timer-ti-dm.c          | 15 +++++++++++++++
 include/linux/platform_data/dmtimer-omap.h |  1 +
 2 files changed, 16 insertions(+)

Patch
diff mbox series

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index b565b8456e5c..73ac73efdef8 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -627,6 +627,20 @@  static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
 	return 0;
 }
 
+static int omap_dm_timer_get_pwm_status(struct omap_dm_timer *timer)
+{
+	u32 l;
+
+	if (unlikely(!timer))
+		return -EINVAL;
+
+	omap_dm_timer_enable(timer);
+	l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+	omap_dm_timer_disable(timer);
+
+	return l;
+}
+
 static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
 					int prescaler)
 {
@@ -927,6 +941,7 @@  static const struct omap_dm_timer_ops dmtimer_ops = {
 	.set_load = omap_dm_timer_set_load,
 	.set_match = omap_dm_timer_set_match,
 	.set_pwm = omap_dm_timer_set_pwm,
+	.get_pwm_status = omap_dm_timer_get_pwm_status,
 	.set_prescaler = omap_dm_timer_set_prescaler,
 	.read_counter = omap_dm_timer_read_counter,
 	.write_counter = omap_dm_timer_write_counter,
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index bdaaf537604a..3173b7b6ff6f 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -36,6 +36,7 @@  struct omap_dm_timer_ops {
 			     unsigned int match);
 	int	(*set_pwm)(struct omap_dm_timer *timer, int def_on,
 			   int toggle, int trigger);
+	int	(*get_pwm_status)(struct omap_dm_timer *timer);
 	int	(*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
 
 	unsigned int (*read_counter)(struct omap_dm_timer *timer);