This patch adds support for "atomic" API. Behavior is the same as
when using legacy APIs.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
drivers/pwm/pwm-rcar.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index a41812f..ba70e83 100644
--- a/drivers/pwm/pwm-rcar.c
+++ b/drivers/pwm/pwm-rcar.c
@@ -192,12 +192,49 @@ static void rcar_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
rcar_pwm_update(rp, RCAR_PWMCR_EN0, 0, RCAR_PWMCR);
}
+static int rcar_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct rcar_pwm_chip *rp = to_rcar_pwm_chip(chip);
+ struct pwm_state cur_state;
+ int div, ret;
+
+ /* This HW doesn't support changing polarity */
+ pwm_get_state(pwm, &cur_state);
+ if (state->polarity != cur_state.polarity)
+ return -ENOTSUPP;
+
+ div = rcar_pwm_get_clock_division(rp, state->period);
+ if (div < 0)
+ return div;
+
+ rcar_pwm_update(rp, RCAR_PWMCR_SYNC, RCAR_PWMCR_SYNC, RCAR_PWMCR);
+
+ ret = rcar_pwm_set_counter(rp, div, state->duty_cycle, state->period);
+ if (!ret)
+ rcar_pwm_set_clock_control(rp, div);
+
+ /* The SYNC should be set to 0 even if rcar_pwm_set_counter failed */
+ rcar_pwm_update(rp, RCAR_PWMCR_SYNC, 0, RCAR_PWMCR);
+
+ if (!ret && state->enabled)
+ ret = rcar_pwm_enable(chip, pwm);
+
+ if (!state->enabled) {
+ rcar_pwm_disable(chip, pwm);
+ ret = 0;
+ }
+
+ return ret;
+}
+
static const struct pwm_ops rcar_pwm_ops = {
.request = rcar_pwm_request,
.free = rcar_pwm_free,
.config = rcar_pwm_config,
.enable = rcar_pwm_enable,
.disable = rcar_pwm_disable,
+ .apply = rcar_pwm_apply,
.owner = THIS_MODULE,
};
--
1.9.1
