diff options
Diffstat (limited to 'drivers/pwm/pwm-renesas-tpu.c')
| -rw-r--r-- | drivers/pwm/pwm-renesas-tpu.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c index 140fd0bcb93f..e35f2e14777d 100644 --- a/drivers/pwm/pwm-renesas-tpu.c +++ b/drivers/pwm/pwm-renesas-tpu.c @@ -149,10 +149,14 @@ static int tpu_pwm_timer_start(struct tpu_pwm_device *tpd) if (!tpd->timer_on) { /* Wake up device and enable clock. */ - pm_runtime_get_sync(&tpd->tpu->pdev->dev); + ret = pm_runtime_resume_and_get(&tpd->tpu->pdev->dev); + if (ret < 0) + return ret; + ret = clk_prepare_enable(tpd->tpu->clk); if (ret) { dev_err(&tpd->tpu->pdev->dev, "cannot enable clock\n"); + pm_runtime_put(&tpd->tpu->pdev->dev); return ret; } tpd->timer_on = true; @@ -382,15 +386,21 @@ static int tpu_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) return 0; } -static void tpu_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) +static int tpu_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) { struct tpu_device *tpu = to_tpu_device(chip); struct tpu_pwm_device *tpd = &tpu->tpd[pwm->hwpwm]; + int ret; /* The timer must be running to modify the pin output configuration. */ - tpu_pwm_timer_start(tpd); + ret = tpu_pwm_timer_start(tpd); + if (ret < 0) + return ret; + tpu_pwm_set_pin(tpd, TPU_PIN_INACTIVE); tpu_pwm_timer_stop(tpd); + + return 0; } static int tpu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, @@ -401,7 +411,10 @@ static int tpu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, if (state->polarity != pwm->state.polarity) { if (enabled) { - tpu_pwm_disable(chip, pwm); + err = tpu_pwm_disable(chip, pwm); + if (err) + return err; + enabled = false; } @@ -412,7 +425,7 @@ static int tpu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, if (!state->enabled) { if (enabled) - tpu_pwm_disable(chip, pwm); + return tpu_pwm_disable(chip, pwm); return 0; } |