Rockchip pwm need to init polarity, implement pwm_set_invert() to do it.
Signed-off-by: Kever Yang kever.yang@rock-chips.com Acked-by: Simon Glass sjg@chromium.org ---
Changes in v4: None Changes in v3: None Changes in v2: None
drivers/pwm/rk_pwm.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/pwm/rk_pwm.c b/drivers/pwm/rk_pwm.c index 9254f5b..f3b2f76 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, ®s->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, };