Since the device supports linear and non-linear modes, implement the
backlight_scale property to describe this state.
Signed-off-by: Svyatoslav Ryhel <redacted>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
---
drivers/video/backlight/lm3533_bl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 666213cab667a..adcd6ac7cf229 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -141,6 +141,7 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
+ struct backlight_device *bd = bl->bd;
unsigned long linear;
int ret;
@@ -152,6 +153,9 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
if (ret)
return ret;
+ bd->props.scale = linear ? BACKLIGHT_SCALE_LINEAR :
+ BACKLIGHT_SCALE_NON_LINEAR;
+
return len;
}
@@ -294,6 +298,8 @@ static int lm3533_bl_probe(struct platform_device *pdev)
bl->linear = device_property_read_bool(&pdev->dev,
"ti,linear-mapping-mode");
+ props.scale = bl->linear ? BACKLIGHT_SCALE_LINEAR :
+ BACKLIGHT_SCALE_NON_LINEAR;
bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
bl, &lm3533_bl_ops, &props);
--
2.53.0