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pwm: Add the pwm_is_enabled() helper

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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>
This commit is contained in:
Boris Brezillon
2015-07-01 10:21:47 +02:00
committed by Thierry Reding
parent d770e558e2
commit 5c31252c4a
13 changed files with 31 additions and 26 deletions
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4
drivers/pwm/pwm-mxs.c
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@@ -77,7 +77,7 @@ static int mxs_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
* If the PWM channel is disabled, make sure to turn on the clock
* before writing the register. Otherwise, keep it enabled.
*/
if (!test_bit(PWMF_ENABLED, &pwm->flags)) {
if (!pwm_is_enabled(pwm)) {
ret = clk_prepare_enable(mxs->clk);
if (ret)
return ret;
@@ -92,7 +92,7 @@ static int mxs_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
/*
* If the PWM is not enabled, turn the clock off again to save power.
*/
if (!test_bit(PWMF_ENABLED, &pwm->flags))
if (!pwm_is_enabled(pwm))
clk_disable_unprepare(mxs->clk);
return 0;