diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-05-08 12:40:32 +0300 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2022-05-20 17:29:58 +0300 |
| commit | c449a8ca5ea4da2465e7b399ce18e5c5bc824c4f (patch) | |
| tree | ab37332bbc173f6849d55699eb425a4aff4cbb59 /drivers/pwm | |
| parent | 758de66f4bd2cac2b1d71db917c65c3d611d4e74 (diff) | |
| download | linux-c449a8ca5ea4da2465e7b399ce18e5c5bc824c4f.tar.xz | |
pwm: lpc18xx: Implement .apply() callback
To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply().
This pushes a variant of pwm_apply_legacy into the driver that was slightly
simplified because the .set_polarity callback was a noop.
There is no change in behavior.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-lpc18xx-sct.c | 43 |
1 files changed, 30 insertions, 13 deletions
diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c index b909096dba2f..272e0b5d01b8 100644 --- a/drivers/pwm/pwm-lpc18xx-sct.c +++ b/drivers/pwm/pwm-lpc18xx-sct.c @@ -226,14 +226,7 @@ static int lpc18xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, return 0; } -static int lpc18xx_pwm_set_polarity(struct pwm_chip *chip, - struct pwm_device *pwm, - enum pwm_polarity polarity) -{ - return 0; -} - -static int lpc18xx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) +static int lpc18xx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm, enum pwm_polarity polarity) { struct lpc18xx_pwm_chip *lpc18xx_pwm = to_lpc18xx_pwm_chip(chip); struct lpc18xx_pwm_data *lpc18xx_data = &lpc18xx_pwm->channeldata[pwm->hwpwm]; @@ -249,7 +242,7 @@ static int lpc18xx_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) LPC18XX_PWM_EVSTATEMSK(lpc18xx_data->duty_event), LPC18XX_PWM_EVSTATEMSK_ALL); - if (pwm_get_polarity(pwm) == PWM_POLARITY_NORMAL) { + if (polarity == PWM_POLARITY_NORMAL) { set_event = lpc18xx_pwm->period_event; clear_event = lpc18xx_data->duty_event; res_action = LPC18XX_PWM_RES_SET; @@ -308,11 +301,35 @@ static void lpc18xx_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) clear_bit(lpc18xx_data->duty_event, &lpc18xx_pwm->event_map); } +static int lpc18xx_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 && pwm->state.enabled) { + lpc18xx_pwm_disable(chip, pwm); + enabled = false; + } + + if (!state->enabled) { + if (enabled) + lpc18xx_pwm_disable(chip, pwm); + + return 0; + } + + err = lpc18xx_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period); + if (err) + return err; + + if (!enabled) + err = lpc18xx_pwm_enable(chip, pwm, state->polarity); + + return err; +} static const struct pwm_ops lpc18xx_pwm_ops = { - .config = lpc18xx_pwm_config, - .set_polarity = lpc18xx_pwm_set_polarity, - .enable = lpc18xx_pwm_enable, - .disable = lpc18xx_pwm_disable, + .apply = lpc18xx_pwm_apply, .request = lpc18xx_pwm_request, .free = lpc18xx_pwm_free, .owner = THIS_MODULE, |