video: tegra20: pwm-backlight: convert into DC child

Establish the backlight as a DC display controller child.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

diff --git a/drivers/video/tegra20/tegra-pwm-backlight.c b/drivers/video/tegra20/tegra-pwm-backlight.c
index 79d8a02..998f0df 100644 (file)
--- a/drivers/video/tegra20/tegra-pwm-backlight.c
+++ b/drivers/video/tegra20/tegra-pwm-backlight.c
@@ -17,9 +17,6 @@
 
 #include "tegra-dc.h"
 
-#define TEGRA_DISPLAY_A_BASE           0x54200000
-#define TEGRA_DISPLAY_B_BASE           0x54240000
-
 #define TEGRA_PWM_BL_MIN_BRIGHTNESS    0x10
 #define TEGRA_PWM_BL_MAX_BRIGHTNESS    0xFF
 
@@ -106,14 +103,11 @@ static int tegra_pwm_backlight_enable(struct udevice *dev)
 static int tegra_pwm_backlight_probe(struct udevice *dev)
 {
        struct tegra_pwm_backlight_priv *priv = dev_get_priv(dev);
+       ofnode dc = ofnode_get_parent(dev_ofnode(dev));
 
-       if (dev_read_bool(dev, "nvidia,display-b-base"))
-               priv->dc = (struct dc_ctlr *)TEGRA_DISPLAY_B_BASE;
-       else
-               priv->dc = (struct dc_ctlr *)TEGRA_DISPLAY_A_BASE;
-
+       priv->dc = (struct dc_ctlr *)ofnode_get_addr(dc);
        if (!priv->dc) {
-               log_err("no display controller address\n");
+               log_err("%s: failed to get DC controller\n", __func__);
                return -EINVAL;
        }