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dt-bindings: move backlight bindings under leds

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Backlights are generally a subtype of LEDs at least from a software
point of view if not always electrically. Move the bindings from the
video directory to underneath the leds dir.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
This commit is contained in:
Rob Herring
2015-09-21 10:50:52 -05:00
parent efdbd7345f
commit 7755313e69
9 changed files with 1 additions and 1 deletions
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15
Documentation/devicetree/bindings/leds/backlight/88pm860x.txt Normal file
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88pm860x-backlight bindings
Optional properties:
- marvell,88pm860x-iset: Current supplies on backlight device.
- marvell,88pm860x-pwm: PWM frequency on backlight device.
Example:
backlights {
backlight-0 {
marvell,88pm860x-iset = <4>;
marvell,88pm860x-pwm = <3>;
};
backlight-2 {
};

16
Documentation/devicetree/bindings/leds/backlight/gpio-backlight.txt Normal file
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gpio-backlight bindings
Required properties:
- compatible: "gpio-backlight"
- gpios: describes the gpio that is used for enabling/disabling the backlight.
refer to bindings/gpio/gpio.txt for more details.
Optional properties:
- default-on: enable the backlight at boot.
Example:
backlight {
compatible = "gpio-backlight";
gpios = <&gpio3 4 GPIO_ACTIVE_HIGH>;
default-on;
};

70
Documentation/devicetree/bindings/leds/backlight/lp855x.txt Normal file
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lp855x bindings
Required properties:
- compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
"ti,lp8555", "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)
- power-supply: Regulator which controls the 3V rail
Example:
/* LP8555 */
backlight@2c {
compatible = "ti,lp8555";
reg = <0x2c>;
dev-ctrl = /bits/ 8 <0x00>;
pwm-period = <10000>;
/* 4V OV, 4 output LED0 string enabled */
rom_14h {
rom-addr = /bits/ 8 <0x14>;
rom-val = /bits/ 8 <0xcf>;
};
/* Heavy smoothing, 24ms ramp time step */
rom_15h {
rom-addr = /bits/ 8 <0x15>;
rom-val = /bits/ 8 <0xc7>;
};
/* 4 output LED1 string enabled */
rom_19h {
rom-addr = /bits/ 8 <0x19>;
rom-val = /bits/ 8 <0x0f>;
};
};
/* 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>;
power-supply = <&backlight_vdd>;
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>;
};
};

10
Documentation/devicetree/bindings/leds/backlight/max8925-backlight.txt Normal file
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88pm860x-backlight bindings
Optional properties:
- maxim,max8925-dual-string: whether support dual string
Example:
backlights {
maxim,max8925-dual-string = <0>;
};

40
Documentation/devicetree/bindings/leds/backlight/pm8941-wled.txt Normal file
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Binding for Qualcomm PM8941 WLED driver
Required properties:
- compatible: should be "qcom,pm8941-wled"
- reg: slave address
Optional properties:
- label: The name of the backlight device
- qcom,cs-out: bool; enable current sink output
- qcom,cabc: bool; enable content adaptive backlight control
- qcom,ext-gen: bool; use externally generated modulator signal to dim
- qcom,current-limit: mA; per-string current limit; value from 0 to 25
default: 20mA
- qcom,current-boost-limit: mA; boost current limit; one of:
105, 385, 525, 805, 980, 1260, 1400, 1680
default: 805mA
- qcom,switching-freq: kHz; switching frequency; one of:
600, 640, 685, 738, 800, 872, 960, 1066, 1200, 1371,
1600, 1920, 2400, 3200, 4800, 9600,
default: 1600kHz
- qcom,ovp: V; Over-voltage protection limit; one of:
27, 29, 32, 35
default: 29V
- qcom,num-strings: #; number of led strings attached; value from 1 to 3
default: 2
Example:
pm8941-wled@d800 {
compatible = "qcom,pm8941-wled";
reg = <0xd800>;
label = "backlight";
qcom,cs-out;
qcom,current-limit = <20>;
qcom,current-boost-limit = <805>;
qcom,switching-freq = <1600>;
qcom,ovp = <29>;
qcom,num-strings = <2>;
};

35
Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt Normal file
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pwm-backlight bindings
Required properties:
- compatible: "pwm-backlight"
- pwms: OF device-tree PWM specification (see PWM binding[0])
- brightness-levels: Array of distinct brightness levels. Typically these
are in the range from 0 to 255, but any range starting at 0 will do.
The actual brightness level (PWM duty cycle) will be interpolated
from these values. 0 means a 0% duty cycle (darkest/off), while the
last value in the array represents a 100% duty cycle (brightest).
- default-brightness-level: the default brightness level (index into the
array defined by the "brightness-levels" property)
- power-supply: regulator for supply voltage
Optional properties:
- pwm-names: a list of names for the PWM devices specified in the
"pwms" property (see PWM binding[0])
- enable-gpios: contains a single GPIO specifier for the GPIO which enables
and disables the backlight (see GPIO binding[1])
[0]: Documentation/devicetree/bindings/pwm/pwm.txt
[1]: Documentation/devicetree/bindings/gpio/gpio.txt
Example:
backlight {
compatible = "pwm-backlight";
pwms = <&pwm 0 5000000>;
brightness-levels = <0 4 8 16 32 64 128 255>;
default-brightness-level = <6>;
power-supply = <&vdd_bl_reg>;
enable-gpios = <&gpio 58 0>;
};

29
Documentation/devicetree/bindings/leds/backlight/sky81452-backlight.txt Normal file
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SKY81452-backlight bindings
Required properties:
- compatible : Must be "skyworks,sky81452-backlight"
Optional properties:
- name : Name of backlight device. Default is 'lcd-backlight'.
- gpios : GPIO to use to EN pin.
See Documentation/devicetree/bindings/gpio/gpio.txt
- led-sources : List of enabled channels from 0 to 5.
See Documentation/devicetree/bindings/leds/common.txt
- skyworks,ignore-pwm : Ignore both PWM input
- skyworks,dpwm-mode : Enable DPWM dimming mode, otherwise Analog dimming.
- skyworks,phase-shift : Enable phase shift mode
- skyworks,short-detection-threshold-volt
: It should be one of 4, 5, 6 and 7V.
- skyworks,current-limit-mA
: It should be 2300mA or 2750mA.
Example:
backlight {
compatible = "skyworks,sky81452-backlight";
name = "pwm-backlight";
led-sources = <0 1 2 5>;
skyworks,ignore-pwm;
skyworks,phase-shift;
skyworks,current-limit-mA = <2300>;
};

27
Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt Normal file
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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>;
};
};