diff options
author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-06-23 16:02:39 +0200 |
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committer | Thierry Reding <thierry.reding@gmail.com> | 2021-06-30 19:12:20 +0200 |
commit | 6d45374af539c84d17cfcf5a4e96bc4b2ca421e6 (patch) | |
tree | 97f1a9830dd8153a4754ec3f9c739e2fa41c2b07 /drivers/pwm/pwm-ep93xx.c | |
parent | 868f13bdea3304362dd882f216ba30a8bf4c10c8 (diff) | |
download | linux-6d45374af539c84d17cfcf5a4e96bc4b2ca421e6.tar.bz2 |
pwm: ep93xx: Implement .apply callback
To ease review this reuses the formerly implemented callbacks.
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/pwm-ep93xx.c')
-rw-r--r-- | drivers/pwm/pwm-ep93xx.c | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/drivers/pwm/pwm-ep93xx.c b/drivers/pwm/pwm-ep93xx.c index 4ca70794ad96..3ef4b41bfd66 100644 --- a/drivers/pwm/pwm-ep93xx.c +++ b/drivers/pwm/pwm-ep93xx.c @@ -156,13 +156,48 @@ static void ep93xx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) clk_disable(ep93xx_pwm->clk); } +static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + int ret; + bool enabled = state->enabled; + + if (state->polarity != pwm->state.polarity) { + if (enabled) { + ep93xx_pwm_disable(chip, pwm); + enabled = false; + } + + ret = ep93xx_pwm_polarity(chip, pwm, state->polarity); + if (ret) + return ret; + } + + if (!state->enabled) { + if (enabled) + ep93xx_pwm_disable(chip, pwm); + + return 0; + } + + if (state->period != pwm->state.period || + state->duty_cycle != pwm->state.duty_cycle) { + ret = ep93xx_pwm_config(chip, pwm, (int)state->duty_cycle, + (int)state->period); + if (ret) + return ret; + } + + if (!enabled) + return ep93xx_pwm_enable(chip, pwm); + + return 0; +} + static const struct pwm_ops ep93xx_pwm_ops = { .request = ep93xx_pwm_request, .free = ep93xx_pwm_free, - .config = ep93xx_pwm_config, - .set_polarity = ep93xx_pwm_polarity, - .enable = ep93xx_pwm_enable, - .disable = ep93xx_pwm_disable, + .apply = ep93xx_pwm_apply, .owner = THIS_MODULE, }; |