pwm: Add the pwm_is_enabled() helper

Some PWM drivers are testing the PWMF_ENABLED flag. Create a helper
function to hide the logic behind enabled test. This will allow us to
smoothly move from the current approach to an atomic PWM update
approach.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index a947c9095d9d..b3b294de88e0 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -114,7 +114,7 @@ static int atmel_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         u32 val;
         int ret;
 
-        if (test_bit(PWMF_ENABLED, &pwm->flags) && (period_ns != pwm->period)) {
+        if (pwm_is_enabled(pwm) && (period_ns != pwm->period)) {
                 dev_err(chip->dev, "cannot change PWM period while enabled\n");
                 return -EBUSY;
         }
@@ -176,7 +176,7 @@ static void atmel_pwm_config_v1(struct pwm_chip *chip, struct pwm_device *pwm,
          * If the PWM channel is enabled, only update CDTY by using the update
          * register, it needs to set bit 10 of CMR to 0
          */
-        if (test_bit(PWMF_ENABLED, &pwm->flags))
+        if (pwm_is_enabled(pwm))
                 return;
         /*
          * If the PWM channel is disabled, write value to duty and period
@@ -191,7 +191,7 @@ static void atmel_pwm_config_v2(struct pwm_chip *chip, struct pwm_device *pwm,
 {
         struct atmel_pwm_chip *atmel_pwm = to_atmel_pwm_chip(chip);
 
-        if (test_bit(PWMF_ENABLED, &pwm->flags)) {
+        if (pwm_is_enabled(pwm)) {
                 /*
                  * If the PWM channel is enabled, using the duty update register
                  * to update the value.