diff options
Diffstat (limited to 'Documentation/devicetree/bindings/video/backlight')
-rw-r--r-- | Documentation/devicetree/bindings/video/backlight/lp855x.txt | 41 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt | 27 |
2 files changed, 68 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/video/backlight/lp855x.txt b/Documentation/devicetree/bindings/video/backlight/lp855x.txt new file mode 100644 index 000000000000..1482103d288f --- /dev/null +++ b/Documentation/devicetree/bindings/video/backlight/lp855x.txt @@ -0,0 +1,41 @@ +lp855x bindings + +Required properties: + - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553", + "ti,lp8556", "ti,lp8557" + - reg: I2C slave address (u8) + - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device. + +Optional properties: + - bl-name: Backlight device name (string) + - init-brt: Initial value of backlight brightness (u8) + - pwm-period: PWM period value. Set only PWM input mode used (u32) + - rom-addr: Register address of ROM area to be updated (u8) + - rom-val: Register value to be updated (u8) + +Example: + + /* LP8556 */ + backlight@2c { + compatible = "ti,lp8556"; + reg = <0x2c>; + + bl-name = "lcd-bl"; + dev-ctrl = /bits/ 8 <0x85>; + init-brt = /bits/ 8 <0x10>; + }; + + /* LP8557 */ + backlight@2c { + compatible = "ti,lp8557"; + reg = <0x2c>; + + dev-ctrl = /bits/ 8 <0x41>; + init-brt = /bits/ 8 <0x0a>; + + /* 4V OV, 4 output LED string enabled */ + rom_14h { + rom-addr = /bits/ 8 <0x14>; + rom-val = /bits/ 8 <0xcf>; + }; + }; diff --git a/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt new file mode 100644 index 000000000000..5fb9279ac287 --- /dev/null +++ b/Documentation/devicetree/bindings/video/backlight/tps65217-backlight.txt @@ -0,0 +1,27 @@ +TPS65217 family of regulators + +The TPS65217 chip contains a boost converter and current sinks which can be +used to drive LEDs for use as backlights. + +Required properties: +- compatible: "ti,tps65217" +- reg: I2C slave address +- backlight: node for specifying WLED1 and WLED2 lines in TPS65217 +- isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level) +- fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000 +- default-brightness: valid values: 0-100 + +Each regulator is defined using the standard binding for regulators. + +Example: + + tps: tps@24 { + reg = <0x24>; + compatible = "ti,tps65217"; + backlight { + isel = <1>; /* 1 - ISET1, 2 ISET2 */ + fdim = <100>; /* TPS65217_BL_FDIM_100HZ */ + default-brightness = <50>; + }; + }; + |