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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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10
drivers/pwm/pwm-tiecap.c
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@@ -97,7 +97,7 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
writew(reg_val, pc->mmio_base + ECCTL2);
if (!test_bit(PWMF_ENABLED, &pwm->flags)) {
if (!pwm_is_enabled(pwm)) {
/* Update active registers if not running */
writel(duty_cycles, pc->mmio_base + CAP2);
writel(period_cycles, pc->mmio_base + CAP1);
@@ -111,7 +111,7 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
writel(period_cycles, pc->mmio_base + CAP3);
}
if (!test_bit(PWMF_ENABLED, &pwm->flags)) {
if (!pwm_is_enabled(pwm)) {
reg_val = readw(pc->mmio_base + ECCTL2);
/* Disable APWM mode to put APWM output Low */
reg_val &= ~ECCTL2_APWM_MODE;
@@ -179,7 +179,7 @@ static void ecap_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
static void ecap_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
{
if (test_bit(PWMF_ENABLED, &pwm->flags)) {
if (pwm_is_enabled(pwm)) {
dev_warn(chip->dev, "Removing PWM device without disabling\n");
pm_runtime_put_sync(chip->dev);
}
@@ -306,7 +306,7 @@ static int ecap_pwm_suspend(struct device *dev)
ecap_pwm_save_context(pc);
/* Disable explicitly if PWM is running */
if (test_bit(PWMF_ENABLED, &pwm->flags))
if (pwm_is_enabled(pwm))
pm_runtime_put_sync(dev);
return 0;
@@ -318,7 +318,7 @@ static int ecap_pwm_resume(struct device *dev)
struct pwm_device *pwm = pc->chip.pwms;
/* Enable explicitly if PWM was running */
if (test_bit(PWMF_ENABLED, &pwm->flags))
if (pwm_is_enabled(pwm))
pm_runtime_get_sync(dev);
ecap_pwm_restore_context(pc);