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>
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index a947c90..b3b294d 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -114,7 +114,7 @@
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 @@
* 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 @@
{
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.