diff options
| author |   Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-04-28 11:05:26 +0200 |
|---|---|---|
| committer |   Thierry Reding <thierry.reding@gmail.com> | 2021-05-25 18:43:10 +0200 |
| commit | 98761ce4b91b77e0602b1551d11925e817e8a9a5 (patch) | |
| tree | 64b1f7f87b7ea70e0e78353edeb17718cf21972c /drivers/pwm | |
| parent | pwm: spear: Free resources only after pwmchip_remove() (diff) | |
| download | linux-dev-98761ce4b91b77e0602b1551d11925e817e8a9a5.tar.xz linux-dev-98761ce4b91b77e0602b1551d11925e817e8a9a5.zip | |
pwm: spear: Implement .apply() callback
Just using the previous callbacks to implment a similar procedure as the
legacy handling in the core.
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-spear.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c index 05a19e70d570..48c31dac2f32 100644 --- a/drivers/pwm/pwm-spear.c +++ b/drivers/pwm/pwm-spear.c @@ -75,7 +75,7 @@ static inline void spear_pwm_writel(struct spear_pwm_chip *chip, } static int spear_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, - int duty_ns, int period_ns) + u64 duty_ns, u64 period_ns) { struct spear_pwm_chip *pc = to_spear_pwm_chip(chip); u64 val, div, clk_rate; @@ -163,10 +163,35 @@ static void spear_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) clk_disable(pc->clk); } +static int spear_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + int err; + + if (state->polarity != PWM_POLARITY_NORMAL) + return -EINVAL; + + if (!state->enabled) { + if (pwm->state.enabled) + spear_pwm_disable(chip, pwm); + return 0; + } + + if (state->period != pwm->state.period || + state->duty_cycle != pwm->state.duty_cycle) { + err = spear_pwm_config(chip, pwm, state->duty_cycle, state->period); + if (err) + return err; + } + + if (!pwm->state.enabled) + return spear_pwm_enable(chip, pwm); + + return 0; +} + static const struct pwm_ops spear_pwm_ops = { - .config = spear_pwm_config, - .enable = spear_pwm_enable, - .disable = spear_pwm_disable, + .apply = spear_pwm_apply, .owner = THIS_MODULE, }; |