[PATCH 2/2] backlight: rt4831: Add the property parsing for ocp level selection
From: cy_huang <hidden>
Date: 2022-05-26 03:17:10
Also in:
dri-devel, linux-devicetree, linux-leds, lkml
Subsystem:
backlight class/subsystem, framebuffer layer, the rest · Maintainers:
Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds
From: ChiYuan Huang <redacted> Add the property parsing for ocp level selection. Reported-by: Lucas Tsai <redacted> Signed-off-by: ChiYuan Huang <redacted> --- drivers/video/backlight/rt4831-backlight.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/video/backlight/rt4831-backlight.c b/drivers/video/backlight/rt4831-backlight.c
index 42155c7..c81f7d9 100644
--- a/drivers/video/backlight/rt4831-backlight.c
+++ b/drivers/video/backlight/rt4831-backlight.c@@ -12,6 +12,7 @@ #define RT4831_REG_BLCFG 0x02 #define RT4831_REG_BLDIML 0x04 #define RT4831_REG_ENABLE 0x08 +#define RT4831_REG_BLOPT2 0x11 #define RT4831_BLMAX_BRIGHTNESS 2048
@@ -23,6 +24,8 @@ #define RT4831_BLDIML_MASK GENMASK(2, 0) #define RT4831_BLDIMH_MASK GENMASK(10, 3) #define RT4831_BLDIMH_SHIFT 3 +#define RT4831_BLOCP_MASK GENMASK(1, 0) +#define RT4831_BLOCP_SHIFT 0 struct rt4831_priv { struct device *dev;
@@ -120,6 +123,16 @@ static int rt4831_parse_backlight_properties(struct rt4831_priv *priv, if (ret) return ret; + ret = device_property_read_u8(dev, "richtek,bled-ocp-sel", &propval); + if (ret) + propval = RT4831_BLOCPLVL_1P2A; + + propval = min_t(u8, propval, RT4831_BLOCPLVL_1P8A); + ret = regmap_update_bits(priv->regmap, RT4831_REG_BLOPT2, RT4831_BLOCP_MASK, + propval << RT4831_BLOCP_SHIFT); + if (ret) + return ret; + ret = device_property_read_u8(dev, "richtek,channel-use", &propval); if (ret) { dev_err(dev, "richtek,channel-use DT property missing\n");
--
2.7.4