diff options
Diffstat (limited to 'drivers/pwm/pwm-sifive.c')
| -rw-r--r-- | drivers/pwm/pwm-sifive.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c index d833536b5e7a..34d23d56fa25 100644 --- a/drivers/pwm/pwm-sifive.c +++ b/drivers/pwm/pwm-sifive.c @@ -168,24 +168,24 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm, } mutex_unlock(&ddata->lock); - ret = clk_enable(ddata->clk); - if (ret) { - dev_err(ddata->chip.dev, "Enable clk failed\n"); - return ret; + /* + * If the PWM is enabled the clk is already on. So only enable it + * conditionally to have it on exactly once afterwards independent of + * the PWM state. + */ + if (!enabled) { + ret = clk_enable(ddata->clk); + if (ret) { + dev_err(ddata->chip.dev, "Enable clk failed\n"); + return ret; + } } writel(frac, ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm)); - if (state->enabled != enabled) { - if (state->enabled) { - if (clk_enable(ddata->clk)) - dev_err(ddata->chip.dev, "Enable clk failed\n"); - } else { - clk_disable(ddata->clk); - } - } + if (!state->enabled) + clk_disable(ddata->clk); - clk_disable(ddata->clk); return 0; } |