backlight: Pass device through notify callback in the pwm driver

Add the device to the notify callback's arguments in the PWM backlight 
driver. This brings the notify callback into line with the other 
callbacks defined by this driver.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

drivers/video/backlight/pwm_bl.c

@@ -22,8 +22,10 @@
 
 struct pwm_bl_data {
 	struct pwm_device	*pwm;
+	struct device		*dev;
 	unsigned int		period;
-	int			(*notify)(int brightness);
+	int			(*notify)(struct device *,
+					  int brightness);
 };
 
 static int pwm_backlight_update_status(struct backlight_device *bl)
@@ -39,7 +41,7 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
 		brightness = 0;
 
 	if (pb->notify)
-		brightness = pb->notify(brightness);
+		brightness = pb->notify(pb->dev, brightness);
 
 	if (brightness == 0) {
 		pwm_config(pb->pwm, 0, pb->period);
@@ -88,6 +90,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 
 	pb->period = data->pwm_period_ns;
 	pb->notify = data->notify;
+	pb->dev = &pdev->dev;
 
 	pb->pwm = pwm_request(data->pwm_id, "backlight");
 	if (IS_ERR(pb->pwm)) {
@@ -146,7 +149,7 @@ static int pwm_backlight_suspend(struct platform_device *pdev,
 	struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
 
 	if (pb->notify)
-		pb->notify(0);
+		pb->notify(pb->dev, 0);
 	pwm_config(pb->pwm, 0, pb->period);
 	pwm_disable(pb->pwm);
 	return 0;

include/linux/pwm_backlight.h

@@ -10,7 +10,7 @@ struct platform_pwm_backlight_data {
 	unsigned int dft_brightness;
 	unsigned int pwm_period_ns;
 	int (*init)(struct device *dev);
-	int (*notify)(int brightness);
+	int (*notify)(struct device *dev, int brightness);
 	void (*exit)(struct device *dev);
 };