[v5,14/46] pwm: keep PWM state in sync with hardware state

Commit Message

Boris BREZILLON March 30, 2016, 8:03 p.m. UTC

Before the introduction of pwm_args, the core and some drivers were
resetting the PWM period and polarity states to the reference values
(those provided through the DT, a PWM lookup table or hardcoded in the
driver).

Now that all PWM users are correctly using pwm_args to configure their
PWM device, we can safely remove some pwm_set_period/polarity() calls.

Signed-off-by: Boris Brezillon <[e-mail]>
---
 drivers/pwm/core.c         | 5 -----
 drivers/pwm/pwm-clps711x.c | 1 -
 drivers/pwm/pwm-pxa.c      | 1 -
 3 files changed, 7 deletions(-)

Patch

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index cd55d61..6433059 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -147,13 +147,11 @@  of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
 		return pwm;
 
 	pwm->args.period = args->args[1];
-	pwm_set_period(pwm, pwm->args.period);
 
 	if (args->args[2] & PWM_POLARITY_INVERTED)
 		pwm->args.polarity = PWM_POLARITY_INVERSED;
 	else
 		pwm->args.polarity = PWM_POLARITY_NORMAL;
-	pwm_set_polarity(pwm, pwm->args.polarity);
 
 	return pwm;
 }
@@ -175,7 +173,6 @@  of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
 		return pwm;
 
 	pwm->args.period = args->args[1];
-	pwm_set_period(pwm, pwm->args.period);
 
 	return pwm;
 }
@@ -745,8 +742,6 @@  struct pwm_device *pwm_get(struct device *dev, const char *con_id)
 
 	pwm->args.period = chosen->period;
 	pwm->args.polarity = chosen->polarity;
-	pwm_set_period(pwm, chosen->period);
-	pwm_set_polarity(pwm, chosen->polarity);
 
 out:
 	mutex_unlock(&pwm_lookup_lock);
diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
index 807a48d..7d33542 100644
--- a/drivers/pwm/pwm-clps711x.c
+++ b/drivers/pwm/pwm-clps711x.c
@@ -61,7 +61,6 @@  static int clps711x_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 
 	/* Store constant period value */
 	pwm->args.period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, freq);
-	pwm_set_period(pwm, pwm->args.period);
 
 	return 0;
 }
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index 3fcc886..58b709f 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -161,7 +161,6 @@  pxa_pwm_of_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
 		return pwm;
 
 	pwm->args.period = args->args[0];
-	pwm_set_period(pwm, args->args[0]);
 
 	return pwm;
 }