diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-04-20 14:12:37 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2022-05-20 16:16:10 +0200 |
| commit | ec00cd5e63f05461ab48128775c73c851c3c2b18 (patch) | |
| tree | e5fb895cc27a689c0889e6a44366980248d7130b /drivers/pwm | |
| parent | pwm: renesas-tpu: Make use of devm functions (diff) | |
| download | linux-ec00cd5e63f05461ab48128775c73c851c3c2b18.tar.xz linux-ec00cd5e63f05461ab48128775c73c851c3c2b18.zip | |
pwm: renesas-tpu: Implement .apply() callback
To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply().
As pwm->state might not be updated in tpu_pwm_apply() before calling
tpu_pwm_config(), an additional parameter is needed for tpu_pwm_config()
to not change the implemented logic.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-renesas-tpu.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c index 12376988c70e..bebae65a6ed7 100644 --- a/drivers/pwm/pwm-renesas-tpu.c +++ b/drivers/pwm/pwm-renesas-tpu.c @@ -242,7 +242,7 @@ static void tpu_pwm_free(struct pwm_chip *chip, struct pwm_device *_pwm) } static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm, - int duty_ns, int period_ns) + int duty_ns, int period_ns, bool enabled) { static const unsigned int prescalers[] = { 1, 4, 16, 64 }; struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm); @@ -293,7 +293,7 @@ static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm, pwm->duty = duty; /* If the channel is disabled we're done. */ - if (!pwm_is_enabled(_pwm)) + if (!enabled) return 0; if (duty_only && pwm->timer_on) { @@ -366,13 +366,45 @@ static void tpu_pwm_disable(struct pwm_chip *chip, struct pwm_device *_pwm) tpu_pwm_timer_stop(pwm); } +static int tpu_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) { + tpu_pwm_disable(chip, pwm); + enabled = false; + } + + err = tpu_pwm_set_polarity(chip, pwm, state->polarity); + if (err) + return err; + } + + if (!state->enabled) { + if (enabled) + tpu_pwm_disable(chip, pwm); + + return 0; + } + + err = tpu_pwm_config(pwm->chip, pwm, + state->duty_cycle, state->period, enabled); + if (err) + return err; + + if (!enabled) + err = tpu_pwm_enable(chip, pwm); + + return err; +} + static const struct pwm_ops tpu_pwm_ops = { .request = tpu_pwm_request, .free = tpu_pwm_free, - .config = tpu_pwm_config, - .set_polarity = tpu_pwm_set_polarity, - .enable = tpu_pwm_enable, - .disable = tpu_pwm_disable, + .apply = tpu_pwm_apply, .owner = THIS_MODULE, }; |