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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>
This commit is contained in:
Kever Yang 2017-04-24 10:27:50 +08:00 committed by Simon Glass
parent 0b60111aa6
commit 874ee59acc
1 changed files with 16 additions and 1 deletions
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17
drivers/pwm/rk_pwm.c
View File

@ -21,8 +21,22 @@ DECLARE_GLOBAL_DATA_PTR;
struct rk_pwm_priv { struct rk_pwm_priv {
struct rk3288_pwm *regs; struct rk3288_pwm *regs;
ulong freq; 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, static int rk_pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
uint duty_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); 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 | 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, RK_PWM_DISABLE,
&regs->ctrl); &regs->ctrl);
@ -83,6 +97,7 @@ static int rk_pwm_probe(struct udevice *dev)
} }
static const struct pwm_ops rk_pwm_ops = { static const struct pwm_ops rk_pwm_ops = {
.set_invert = rk_pwm_set_invert,
.set_config = rk_pwm_set_config, .set_config = rk_pwm_set_config,
.set_enable = rk_pwm_set_enable, .set_enable = rk_pwm_set_enable,
}; };