drivers/video/backlight/tps65217_bl.c add default brightness value option

Signed-off-by: Matus Ujhelyi <matus.ujhelyi@streamunlimited.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c
index 70881633b45a..05782312aeb3 100644
--- a/drivers/video/backlight/tps65217_bl.c
+++ b/drivers/video/backlight/tps65217_bl.c
@@ -245,6 +245,18 @@ tps65217_bl_parse_dt(struct platform_device *pdev)
                 }
         }
 
+        if (!of_property_read_u32(node, "default-brightness", &val)) {
+                if (val < 0 ||
+                        val > 100) {
+                        dev_err(&pdev->dev,
+                                "invalid 'default-brightness' value in the device tree\n");
+                        err = ERR_PTR(-EINVAL);
+                        goto err;
+                }
+
+                pdata->dft_brightness = val;
+        }
+
         of_node_put(node);
 
         return pdata;
@@ -311,7 +323,8 @@ static int tps65217_bl_probe(struct platform_device *pdev)
                 return PTR_ERR(tps65217_bl->bl);
         }
 
-        tps65217_bl->bl->props.brightness = 0;
+        tps65217_bl->bl->props.brightness = pdata->dft_brightness;
+        backlight_update_status(tps65217_bl->bl);
         platform_set_drvdata(pdev, tps65217_bl);
 
         return 0;