diff options
| -rw-r--r-- | drivers/pwm/core.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index c4d5c0667137..6d3a1c84b053 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -126,8 +126,7 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args) { struct pwm_device *pwm; - /* check, whether the driver supports a third cell for flags */ - if (pc->of_pwm_n_cells < 3) + if (pc->of_pwm_n_cells < 2) return ERR_PTR(-EINVAL); /* flags in the third cell are optional */ @@ -144,8 +143,10 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args) pwm->args.period = args->args[1]; pwm->args.polarity = PWM_POLARITY_NORMAL; - if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED) - pwm->args.polarity = PWM_POLARITY_INVERSED; + if (pc->of_pwm_n_cells >= 3) { + if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED) + pwm->args.polarity = PWM_POLARITY_INVERSED; + } return pwm; } |