Ksawlii/kernel_samsung_a53x
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driver: pwm: Implement .apply() callback

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To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply(). The commit which brings these
changes is `5ec803edcb703fe379836f13560b79dfac79b01d` on the uplink
kernel.

Bug: 332793240
Change-Id: I385f487c474ca2d52a9f3bb4e8afc3843eb4d9f8
Signed-off-by: Karan Bhagoji <karan.rb@samsung.com>
Signed-off-by: Hyunki Koo <hyunki00.koo@samsung.com>
This commit is contained in:
Karan 2023-11-15 15:06:15 -08:00 committed by Kreciorek
parent f887b383c2
commit f11cfb0398
1 changed files with 43 additions and 4 deletions
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47
drivers/pwm/pwm-samsung.c
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@ -603,13 +603,52 @@ static int pwm_samsung_capture(struct pwm_chip *chip, struct pwm_device *pwm,
return 0;
}
static int pwm_samsung_apply(struct pwm_chip *chip, struct pwm_device *pwm,
const struct pwm_state *state)
{
int err, enabled = pwm->state.enabled;
if (state->polarity != pwm->state.polarity) {
if (enabled) {
pwm_samsung_disable(chip, pwm);
enabled = false;
}
err = pwm_samsung_set_polarity(chip, pwm, state->polarity);
if (err)
return err;
}
if (!state->enabled) {
if (enabled)
pwm_samsung_disable(chip, pwm);
return 0;
}
/*
* We currently avoid using 64bit arithmetic by using the
* fact that anything faster than 1Hz is easily representable
* by 32bits.
*/
if (state->period > NSEC_PER_SEC)
return -ERANGE;
err = pwm_samsung_config(chip, pwm, state->duty_cycle, state->period);
if (err)
return err;
if (!pwm->state.enabled)
err = pwm_samsung_enable(chip, pwm);
return err;
}
static const struct pwm_ops pwm_samsung_ops = {
.request = pwm_samsung_request,
.free = pwm_samsung_free,
.enable = pwm_samsung_enable,
.disable = pwm_samsung_disable,
.config = pwm_samsung_config,
.set_polarity = pwm_samsung_set_polarity,
.apply = pwm_samsung_apply,
.capture = pwm_samsung_capture,
.owner = THIS_MODULE,
};