[PATCH v5 43/46] backlight: pwm_bl: switch to the atomic PWM API

[Boris Brezillon]

pwm_config/enable/disable() have been deprecated and should be replaced
by pwm_apply_state().

Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
---
 drivers/video/backlight/pwm_bl.c | 43 ++++++++++++++++++++++------------------
 1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 2479c11..b069fb2 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -43,8 +43,22 @@ struct pwm_bl_data {
        void                    (*exit)(struct device *);
 };
 
+static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
+{
+       unsigned int lth = pb->lth_brightness;
+       int duty_cycle;
+
+       if (pb->levels)
+               duty_cycle = pb->levels[brightness];
+       else
+               duty_cycle = brightness;
+
+       return (duty_cycle * (pb->period - lth) / pb->scale) + lth;
+}
+
 static void pwm_backlight_power_on(struct pwm_bl_data *pb, int brightness)
 {
+       struct pwm_state pstate;
        int err;
 
        if (pb->enabled)
@@ -57,17 +71,24 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb, 
int brightness)
        if (pb->enable_gpio)
                gpiod_set_value(pb->enable_gpio, 1);
 
-       pwm_enable(pb->pwm);
+       pwm_get_state(pb->pwm, &pstate);
+       pstate.duty_cycle = compute_duty_cycle(pb, brightness);
+       pstate.enabled = true;
+       pwm_apply_state(pb->pwm, &pstate);
        pb->enabled = true;
 }
 
 static void pwm_backlight_power_off(struct pwm_bl_data *pb)
 {
+       struct pwm_state pstate;
+
        if (!pb->enabled)
                return;
 
-       pwm_config(pb->pwm, 0, pb->period);
-       pwm_disable(pb->pwm);
+       pwm_get_state(pb->pwm, &pstate);
+       pstate.duty_cycle = 0;
+       pstate.enabled = false;
+       pwm_apply_state(pb->pwm, &pstate);
 
        if (pb->enable_gpio)
                gpiod_set_value(pb->enable_gpio, 0);
@@ -76,24 +97,10 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb)
        pb->enabled = false;
 }
 
-static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
-{
-       unsigned int lth = pb->lth_brightness;
-       int duty_cycle;
-
-       if (pb->levels)
-               duty_cycle = pb->levels[brightness];
-       else
-               duty_cycle = brightness;
-
-       return (duty_cycle * (pb->period - lth) / pb->scale) + lth;
-}
-
 static int pwm_backlight_update_status(struct backlight_device *bl)
 {
        struct pwm_bl_data *pb = bl_get_data(bl);
        int brightness = bl->props.brightness;
-       int duty_cycle;
 
        if (bl->props.power != FB_BLANK_UNBLANK ||
            bl->props.fb_blank != FB_BLANK_UNBLANK ||
@@ -104,8 +111,6 @@ static int pwm_backlight_update_status(struct 
backlight_device *bl)
                brightness = pb->notify(pb->dev, brightness);
 
        if (brightness > 0) {
-               duty_cycle = compute_duty_cycle(pb, brightness);
-               pwm_config(pb->pwm, duty_cycle, pb->period);
                pwm_backlight_power_on(pb, brightness);
        } else
                pwm_backlight_power_off(pb);
-- 
2.5.0

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