[PATCH v3 09/11] video: backlight: lm3533_bl: Set initial mapping mode from DT
From: Svyatoslav Ryhel
Date: Mon Jun 01 2026 - 11:37:54 EST
Add support to obtain the initial mapping mode from DT instead of leaving
it unconfigured.
Signed-off-by: Svyatoslav Ryhel <clamor95@xxxxxxxxx>
---
drivers/video/backlight/lm3533_bl.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 36e6f027613a..f0d88b7bc229 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -34,6 +34,7 @@ struct lm3533_bl {
u32 max_current;
u32 pwm;
+ bool linear;
};
@@ -247,8 +248,15 @@ static struct attribute_group lm3533_bl_attribute_group = {
static int lm3533_bl_setup(struct lm3533_bl *bl)
{
+ int id = lm3533_bl_get_ctrlbank_id(bl);
int ret;
+ ret = regmap_update_bits(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ CTRLBANK_AB_BCONF_MODE(id),
+ bl->linear ? CTRLBANK_AB_BCONF_MODE(id) : 0);
+ if (ret)
+ return ret;
+
ret = lm3533_ctrlbank_set_max_current(&bl->cb, bl->max_current);
if (ret)
return ret;
@@ -299,6 +307,9 @@ static int lm3533_bl_probe(struct platform_device *pdev)
device_property_read_u32(&pdev->dev, "default-brightness",
&props.brightness);
+ bl->linear = device_property_read_bool(&pdev->dev,
+ "ti,linear-mapping-mode");
+
bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
bl, &lm3533_bl_ops, &props);
if (IS_ERR(bd)) {
--
2.51.0