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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2021-04-28 12:05:26 +0300
committerThierry Reding <thierry.reding@gmail.com>2021-05-25 19:43:10 +0300
commit98761ce4b91b77e0602b1551d11925e817e8a9a5 (patch)
tree64b1f7f87b7ea70e0e78353edeb17718cf21972c /drivers/pwm/pwm-spear.c
parentda0dea8912697f725d5f1386a38cb035222e7468 (diff)
downloadlinux-98761ce4b91b77e0602b1551d11925e817e8a9a5.tar.xz
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/pwm-spear.c')
-rw-r--r--drivers/pwm/pwm-spear.c33
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,
};