diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-tiehrpwm.c | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c index 5b723a48c5f1..48ca0ff690ae 100644 --- a/drivers/pwm/pwm-tiehrpwm.c +++ b/drivers/pwm/pwm-tiehrpwm.c @@ -216,7 +216,7 @@ static void configure_polarity(struct ehrpwm_pwm_chip *pc, int chan) * duty_ns = 10^9 * (ps_divval * duty_cycles) / PWM_CLK_RATE */ static int ehrpwm_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, - int duty_ns, int period_ns) + u64 duty_ns, u64 period_ns) { struct ehrpwm_pwm_chip *pc = to_ehrpwm_pwm_chip(chip); u32 period_cycles, duty_cycles; @@ -401,12 +401,42 @@ static void ehrpwm_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) pc->period_cycles[pwm->hwpwm] = 0; } +static int ehrpwm_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + int err; + bool enabled = pwm->state.enabled; + + if (state->polarity != pwm->state.polarity) { + if (enabled) { + ehrpwm_pwm_disable(chip, pwm); + enabled = false; + } + + err = ehrpwm_pwm_set_polarity(chip, pwm, state->polarity); + if (err) + return err; + } + + if (!state->enabled) { + if (enabled) + ehrpwm_pwm_disable(chip, pwm); + return 0; + } + + err = ehrpwm_pwm_config(chip, pwm, state->duty_cycle, state->period); + if (err) + return err; + + if (!enabled) + err = ehrpwm_pwm_enable(chip, pwm); + + return err; +} + static const struct pwm_ops ehrpwm_pwm_ops = { .free = ehrpwm_pwm_free, - .config = ehrpwm_pwm_config, - .set_polarity = ehrpwm_pwm_set_polarity, - .enable = ehrpwm_pwm_enable, - .disable = ehrpwm_pwm_disable, + .apply = ehrpwm_pwm_apply, .owner = THIS_MODULE, }; |