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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2021-11-30 21:19:37 +0100
committerThierry Reding <thierry.reding@gmail.com>2022-02-24 13:52:59 +0100
commit5f027d9b83dbb8c3f9c61c8a53363df86d158a32 (patch)
tree11447a2357860499b85f7da75f3222df4d3a8a75 /drivers/pwm
parent6b94ee669e8a3c2276cfb92103328d0713d74c3c (diff)
pwm: tiehrpwm: Implement .apply() callback
To eventually get rid of all legacy drivers convert this driver to the modern world implementing .apply(). This just pushes down a slightly optimized variant of how legacy drivers are handled 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-tiehrpwm.c40
1 files changed, 35 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index 5b723a48c5f1..48ca0ff690ae 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -216,7 +216,7 @@ static void configure_polarity(struct ehrpwm_pwm_chip *pc, int chan)
* duty_ns = 10^9 * (ps_divval * duty_cycles) / PWM_CLK_RATE
*/
static int ehrpwm_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
- int duty_ns, int period_ns)
+ u64 duty_ns, u64 period_ns)
{
struct ehrpwm_pwm_chip *pc = to_ehrpwm_pwm_chip(chip);
u32 period_cycles, duty_cycles;
@@ -401,12 +401,42 @@ static void ehrpwm_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
pc->period_cycles[pwm->hwpwm] = 0;
}
+static int ehrpwm_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) {
+ ehrpwm_pwm_disable(chip, pwm);
+ enabled = false;
+ }
+
+ err = ehrpwm_pwm_set_polarity(chip, pwm, state->polarity);
+ if (err)
+ return err;
+ }
+
+ if (!state->enabled) {
+ if (enabled)
+ ehrpwm_pwm_disable(chip, pwm);
+ return 0;
+ }
+
+ err = ehrpwm_pwm_config(chip, pwm, state->duty_cycle, state->period);
+ if (err)
+ return err;
+
+ if (!enabled)
+ err = ehrpwm_pwm_enable(chip, pwm);
+
+ return err;
+}
+
static const struct pwm_ops ehrpwm_pwm_ops = {
.free = ehrpwm_pwm_free,
- .config = ehrpwm_pwm_config,
- .set_polarity = ehrpwm_pwm_set_polarity,
- .enable = ehrpwm_pwm_enable,
- .disable = ehrpwm_pwm_disable,
+ .apply = ehrpwm_pwm_apply,
.owner = THIS_MODULE,
};