summaryrefslogtreecommitdiff
path: root/drivers/pwm/rk_pwm.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pwm/rk_pwm.c')
-rw-r--r--drivers/pwm/rk_pwm.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/pwm/rk_pwm.c b/drivers/pwm/rk_pwm.c
index 9254f5bc39..f3b2f7615d 100644
--- a/drivers/pwm/rk_pwm.c
+++ b/drivers/pwm/rk_pwm.c
@@ -21,8 +21,22 @@ DECLARE_GLOBAL_DATA_PTR;
struct rk_pwm_priv {
struct rk3288_pwm *regs;
ulong freq;
+ uint enable_conf;
};
+static int rk_pwm_set_invert(struct udevice *dev, uint channel, bool polarity)
+{
+ struct rk_pwm_priv *priv = dev_get_priv(dev);
+
+ debug("%s: polarity=%u\n", __func__, polarity);
+ if (polarity)
+ priv->enable_conf |= PWM_DUTY_NEGATIVE | PWM_INACTIVE_POSTIVE;
+ else
+ priv->enable_conf |= PWM_DUTY_POSTIVE | PWM_INACTIVE_NEGATIVE;
+
+ return 0;
+}
+
static int rk_pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
uint duty_ns)
{
@@ -32,7 +46,7 @@ static int rk_pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
debug("%s: period_ns=%u, duty_ns=%u\n", __func__, period_ns, duty_ns);
writel(PWM_SEL_SRC_CLK | PWM_OUTPUT_LEFT | PWM_LP_DISABLE |
- PWM_CONTINUOUS | PWM_DUTY_POSTIVE | PWM_INACTIVE_POSTIVE |
+ PWM_CONTINUOUS | priv->enable_conf |
RK_PWM_DISABLE,
&regs->ctrl);
@@ -83,6 +97,7 @@ static int rk_pwm_probe(struct udevice *dev)
}
static const struct pwm_ops rk_pwm_ops = {
+ .set_invert = rk_pwm_set_invert,
.set_config = rk_pwm_set_config,
.set_enable = rk_pwm_set_enable,
};