backlight: rave-sp: Leave initial state and register with correct device

This way the backlight can be referenced through its device node and
enabling/disabling can be managed through the panel driver.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/video/backlight/rave-sp-backlight.c b/drivers/video/backlight/rave-sp-backlight.c
index 462f14a1b19dcb2d20ccc98983a67d6869c24445..05b5f003a3d1ab152118b427233b73af142e931c 100644 (file)
--- a/drivers/video/backlight/rave-sp-backlight.c
+++ b/drivers/video/backlight/rave-sp-backlight.c
@@ -48,14 +48,20 @@ static int rave_sp_backlight_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct backlight_device *bd;
 
-       bd = devm_backlight_device_register(dev, pdev->name, dev->parent,
+       bd = devm_backlight_device_register(dev, pdev->name, dev,
                                            dev_get_drvdata(dev->parent),
                                            &rave_sp_backlight_ops,
                                            &rave_sp_backlight_props);
        if (IS_ERR(bd))
                return PTR_ERR(bd);
 
-       backlight_update_status(bd);
+       /*
+        * If there is a phandle pointing to the device node we can
+        * assume that another device will manage the status changes.
+        * If not we make sure the backlight is in a consistent state.
+        */
+       if (!dev->of_node->phandle)
+               backlight_update_status(bd);
 
        return 0;
 }