diff options
Diffstat (limited to 'drivers/pwm/pwm-lpss.c')
| -rw-r--r-- | drivers/pwm/pwm-lpss.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c index df03b50f20dd..25044104003b 100644 --- a/drivers/pwm/pwm-lpss.c +++ b/drivers/pwm/pwm-lpss.c @@ -16,6 +16,7 @@ #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/pm_runtime.h> #include "pwm-lpss.h" @@ -105,6 +106,8 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, duty_ns = 1; on_time_div = 255 - (255 * duty_ns / period_ns); + pm_runtime_get_sync(chip->dev); + ctrl = pwm_lpss_read(pwm); ctrl &= ~(PWM_BASE_UNIT_MASK | PWM_ON_TIME_DIV_MASK); ctrl |= (u16) base_unit << PWM_BASE_UNIT_SHIFT; @@ -113,11 +116,14 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, ctrl |= PWM_SW_UPDATE; pwm_lpss_write(pwm, ctrl); + pm_runtime_put(chip->dev); + return 0; } static int pwm_lpss_enable(struct pwm_chip *chip, struct pwm_device *pwm) { + pm_runtime_get_sync(chip->dev); pwm_lpss_write(pwm, pwm_lpss_read(pwm) | PWM_ENABLE); return 0; } @@ -125,6 +131,7 @@ static int pwm_lpss_enable(struct pwm_chip *chip, struct pwm_device *pwm) static void pwm_lpss_disable(struct pwm_chip *chip, struct pwm_device *pwm) { pwm_lpss_write(pwm, pwm_lpss_read(pwm) & ~PWM_ENABLE); + pm_runtime_put(chip->dev); } static const struct pwm_ops pwm_lpss_ops = { |