backlight/pandora_bl.c: use backlight core suspend instead

can drop some code and perhaps fix a crash.

diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c
index 724188f..eb56e62 100644 (file)
--- a/drivers/video/backlight/pandora_bl.c
+++ b/drivers/video/backlight/pandora_bl.c
@@ -53,6 +53,8 @@ static int pwm0_backlight_update_status(struct backlight_device *bl)
 
        if (bl->props.power != FB_BLANK_UNBLANK)
                brightness = 0;
+       if (bl->props.state & BL_CORE_SUSPENDED)
+               brightness = 0;
 
        /* ignore fb blank for now
        if (bl->props.fb_blank != FB_BLANK_UNBLANK)
@@ -103,6 +105,7 @@ static int pwm0_backlight_get_brightness(struct backlight_device *bl)
 }
 
 static const struct backlight_ops pwm0_backlight_ops = {
+       .options        = BL_CORE_SUSPENDRESUME,
        .update_status  = pwm0_backlight_update_status,
        .get_brightness = pwm0_backlight_get_brightness,
 };
@@ -123,6 +126,8 @@ static int pwm0_backlight_probe(struct platform_device *pdev)
                return PTR_ERR(bl);
        }
 
+       platform_set_drvdata(pdev, bl);
+
        /* 64 cycle period, ON position 0 */
        twl_i2c_write_u8(TWL4030_MODULE_PWM0, 0x80, TWL_PWM0_ON);
 
@@ -145,28 +150,6 @@ static int pwm0_backlight_remove(struct platform_device *pdev)
        return 0;
 }
 
-#ifdef CONFIG_PM
-static int pwm0_backlight_suspend(struct platform_device *pdev,
-                                pm_message_t state)
-{
-       pwm0_disable();
-       old_brightness = 0;
-
-       return 0;
-}
-
-static int pwm0_backlight_resume(struct platform_device *pdev)
-{
-       struct backlight_device *bl = platform_get_drvdata(pdev);
-
-       backlight_update_status(bl);
-       return 0;
-}
-#else
-#define pwm0_backlight_suspend NULL
-#define pwm0_backlight_resume  NULL
-#endif
-
 static struct platform_driver pwm0_backlight_driver = {
        .driver         = {
                .name   = "twl4030-pwm0-bl",
@@ -174,8 +157,6 @@ static struct platform_driver pwm0_backlight_driver = {
        },
        .probe          = pwm0_backlight_probe,
        .remove         = pwm0_backlight_remove,
-       .suspend        = pwm0_backlight_suspend,
-       .resume         = pwm0_backlight_resume,
 };
 
 static int __init pwm0_backlight_init(void)