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author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-18 08:36:45 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-18 08:36:45 +0100 |
commit | 23c49023191715dc7d3f3e9e6376d321918ad892 (patch) | |
tree | 223f081f81d961a4cbffeab5c7a704d4b20b0e86 /drivers | |
parent | b8ed83076ffdc2c6831061003afaecf8ba802aab (diff) | |
parent | 122b607841b1db922fb272bcdffcc28c225e88d0 (diff) | |
download | barebox-23c49023191715dc7d3f3e9e6376d321918ad892.tar.gz barebox-23c49023191715dc7d3f3e9e6376d321918ad892.tar.xz |
Merge branch 'for-next/pwm'
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/led/led-pwm.c | 10 | ||||
-rw-r--r-- | drivers/pwm/pxa_pwm.c | 11 | ||||
-rw-r--r-- | drivers/video/backlight-pwm.c | 2 |
3 files changed, 11 insertions, 12 deletions
diff --git a/drivers/led/led-pwm.c b/drivers/led/led-pwm.c index 16d22b5569..8a358dde88 100644 --- a/drivers/led/led-pwm.c +++ b/drivers/led/led-pwm.c @@ -41,6 +41,9 @@ static void led_pwm_set(struct led *led, unsigned int brightness) duty *= brightness; do_div(duty, max); + if (pwmled->active_low) + duty = pwmled->period - duty; + pwm_config(pwmled->pwm, duty, pwmled->period); } @@ -54,16 +57,19 @@ static int led_pwm_of_probe(struct device_d *dev) struct pwm_device *pwm; pwm = of_pwm_request(child, NULL); - if (pwm < 0) + if (IS_ERR(pwm)) continue; pwmled = xzalloc(sizeof(*pwmled)); pwmled->led.name = xstrdup(child->name); pwmled->pwm = pwm; - of_property_read_u32(child, "max-brightness", &pwmled->led.max_value); + ret = of_property_read_u32(child, "max-brightness", &pwmled->led.max_value); + if (ret) + return ret; pwmled->period = pwm_get_period(pwmled->pwm); + pwmled->active_low = of_property_read_bool(child, "active-low"); pwmled->led.set = led_pwm_set; diff --git a/drivers/pwm/pxa_pwm.c b/drivers/pwm/pxa_pwm.c index c7130c225e..4575817e94 100644 --- a/drivers/pwm/pxa_pwm.c +++ b/drivers/pwm/pxa_pwm.c @@ -34,8 +34,6 @@ struct pxa_pwm_chip { struct pwm_chip chip; void __iomem *iobase; int id; - int duty_ns; - int period_ns; }; static struct pxa_pwm_chip *to_pxa_pwm_chip(struct pwm_chip *chip) @@ -72,15 +70,12 @@ static int pxa_pwm_config(struct pwm_chip *chip, int duty_ns, int period_ns) else dc = (pv + 1) * duty_ns / period_ns; - pxa_pwm->duty_ns = duty_ns; - pxa_pwm->period_ns = period_ns; - /* NOTE: the clock to PWM has to be enabled first * before writing to the registers */ - __raw_writel(prescale, pxa_pwm->iobase + PWMCR); - __raw_writel(dc, pxa_pwm->iobase + PWMDCR); - __raw_writel(pv, pxa_pwm->iobase + PWMPCR); + writel(prescale, pxa_pwm->iobase + PWMCR); + writel(dc, pxa_pwm->iobase + PWMDCR); + writel(pv, pxa_pwm->iobase + PWMPCR); return 0; } diff --git a/drivers/video/backlight-pwm.c b/drivers/video/backlight-pwm.c index 997235a74a..9111a42d75 100644 --- a/drivers/video/backlight-pwm.c +++ b/drivers/video/backlight-pwm.c @@ -204,8 +204,6 @@ static int backlight_pwm_of_probe(struct device_d *dev) return PTR_ERR(pwm_backlight->power); } - pwm_backlight->period = pwm_get_period(pwm_backlight->pwm); - pwm_backlight->backlight.slew_time_ms = 100; pwm_backlight->backlight.brightness_set = backlight_pwm_set; pwm_backlight->backlight.node = dev->device_node; |