From: Lokesh Vutla <lokeshvutla@ti.com>
To: "Thierry Reding" <thierry.reding@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Tony Lindgren <tony@atomide.com>,
Linux OMAP Mailing List <linux-omap@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-pwm@vger.kernel.org>,
Sekhar Nori <nsekhar@ti.com>, Vignesh R <vigneshr@ti.com>,
Lokesh Vutla <lokeshvutla@ti.com>
Subject: [PATCH v2 3/6] pwm: omap-dmtimer: Fix pwm enabling sequence
Date: Fri, 28 Feb 2020 15:26:48 +0530 [thread overview]
Message-ID: <20200228095651.32464-4-lokeshvutla@ti.com> (raw)
In-Reply-To: <20200228095651.32464-1-lokeshvutla@ti.com>
To configure DM timer in pwm mode the following needs to be set in
OMAP_TIMER_CTRL_REG using set_pwm callback:
- Set toggle mode on PORTIMERPWM output pin
- Set trigger on overflow and match on PORTIMERPWM output pin.
- Set auto reload
This is a one time configuration and needs to be set before the start of
the dm timer. But the current driver tries to set the same configuration
for every period/duty cycle update, which is not needed. So move the pwm
setup before enabling timer and do not update it in pwm_omap_dmtimer_config.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
drivers/pwm/pwm-omap-dmtimer.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c
index a24a630ccdb9..bc338619232d 100644
--- a/drivers/pwm/pwm-omap-dmtimer.c
+++ b/drivers/pwm/pwm-omap-dmtimer.c
@@ -77,6 +77,11 @@ static int pwm_omap_dmtimer_enable(struct pwm_chip *chip,
struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);
mutex_lock(&omap->mutex);
+ omap->pdata->set_pwm(omap->dm_timer,
+ pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED,
+ true, OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE,
+ true);
+
pwm_omap_dmtimer_start(omap);
mutex_unlock(&omap->mutex);
@@ -193,11 +198,6 @@ static int pwm_omap_dmtimer_config(struct pwm_chip *chip,
dev_dbg(chip->dev, "load value: %#08x (%d), match value: %#08x (%d)\n",
load_value, load_value, match_value, match_value);
- omap->pdata->set_pwm(omap->dm_timer,
- pwm_get_polarity(pwm) == PWM_POLARITY_INVERSED,
- true, OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE,
- true);
-
/* If config was called while timer was running it must be reenabled. */
if (timer_active)
pwm_omap_dmtimer_start(omap);
--
2.23.0
next prev parent reply other threads:[~2020-02-28 9:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 9:56 [PATCH v2 0/5] pwm: omap-dmtimer: Allow for dynamic pwm period updates Lokesh Vutla
2020-02-28 9:56 ` [PATCH v2 1/6] pwm: omap-dmtimer: Drop unused header file Lokesh Vutla
2020-03-06 18:03 ` Tony Lindgren
2020-02-28 9:56 ` [PATCH v2 2/6] pwm: omap-dmtimer: Update description for pwm omap dm timer Lokesh Vutla
2020-03-06 18:03 ` Tony Lindgren
2020-02-28 9:56 ` Lokesh Vutla [this message]
2020-03-06 18:04 ` [PATCH v2 3/6] pwm: omap-dmtimer: Fix pwm enabling sequence Tony Lindgren
2020-02-28 9:56 ` [PATCH v2 4/6] pwm: omap-dmtimer: Fix pwm disabling sequence Lokesh Vutla
2020-03-06 18:14 ` Tony Lindgren
2020-03-09 4:51 ` Lokesh Vutla
2020-03-09 12:30 ` Sebastian Reichel
2020-03-09 18:01 ` Tony Lindgren
2020-03-10 7:04 ` Lokesh Vutla
2020-03-10 15:52 ` Tony Lindgren
2020-03-11 4:12 ` Lokesh Vutla
2020-03-12 0:58 ` Tony Lindgren
2020-03-13 15:34 ` Tony Lindgren
2020-03-13 15:50 ` Tony Lindgren
2020-02-28 9:56 ` [PATCH v2 5/6] pwm: omap-dmtimer: Do not disable pwm before changing period/duty_cycle Lokesh Vutla
2020-03-06 18:17 ` Tony Lindgren
2020-02-28 9:56 ` [PATCH v2 6/6] pwm: omap-dmtimer: Implement .apply callback Lokesh Vutla
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