diff options
| -rw-r--r-- | drivers/pwm/core.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 31f210872a07..606d9ef0c709 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -107,8 +107,8 @@ of_pwm_xlate_with_flags(struct pwm_chip *chip, const struct of_phandle_args *arg { struct pwm_device *pwm; - /* flags in the third cell are optional */ - if (args->args_count < 2) + /* period in the second cell and flags in the third cell are optional */ + if (args->args_count < 1) return ERR_PTR(-EINVAL); if (args->args[0] >= chip->npwm) @@ -118,9 +118,10 @@ of_pwm_xlate_with_flags(struct pwm_chip *chip, const struct of_phandle_args *arg if (IS_ERR(pwm)) return pwm; - pwm->args.period = args->args[1]; - pwm->args.polarity = PWM_POLARITY_NORMAL; + if (args->args_count > 1) + 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; @@ -133,18 +134,15 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args) { struct pwm_device *pwm; - /* validate that one cell is specified, optionally with flags */ - if (args->args_count != 1 && args->args_count != 2) - return ERR_PTR(-EINVAL); - pwm = pwm_request_from_chip(chip, 0, NULL); if (IS_ERR(pwm)) return pwm; - pwm->args.period = args->args[0]; - pwm->args.polarity = PWM_POLARITY_NORMAL; + if (args->args_count > 1) + pwm->args.period = args->args[0]; - if (args->args_count == 2 && args->args[1] & PWM_POLARITY_INVERTED) + pwm->args.polarity = PWM_POLARITY_NORMAL; + if (args->args_count > 1 && args->args[1] & PWM_POLARITY_INVERTED) pwm->args.polarity = PWM_POLARITY_INVERSED; return pwm; |