diff options
| author | Kever Yang <kever.yang@rock-chips.com> | 2017-04-24 10:27:50 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-05-10 13:37:21 -0600 |
| commit | 874ee59accf4be62e1c10703518a0ba2bb8304ac (patch) | |
| tree | 52c9e50ebd3b68e1a3cebbfbe28808553e266cca /drivers/pwm/rk_pwm.c | |
| parent | 0b60111aa66f51d05473a375070ca72d073a6fd3 (diff) | |
| download | u-boot-874ee59accf4be62e1c10703518a0ba2bb8304ac.tar.gz | |
rockchip: pwm: implement pwm_set_invert()
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>
Diffstat (limited to 'drivers/pwm/rk_pwm.c')
| -rw-r--r-- | drivers/pwm/rk_pwm.c | 17 |
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, ®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, }; |