--- /dev/null
+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 {
+ };
--- /dev/null
+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;
+ };
--- /dev/null
+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>;
+ };
+ };
--- /dev/null
+88pm860x-backlight bindings
+
+Optional properties:
+ - maxim,max8925-dual-string: whether support dual string
+
+Example:
+
+ backlights {
+ maxim,max8925-dual-string = <0>;
+ };
--- /dev/null
+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>;
+};
--- /dev/null
+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>;
+ };
--- /dev/null
+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>;
+ };
--- /dev/null
+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>;
+ };
+ };
+
Required child nodes:
- backlight : container node for backlight following the binding
- in video/backlight/sky81452-backlight.txt
+ in leds/backlight/sky81452-backlight.txt
- regulator : container node for regulators following the binding
in regulator/sky81452-regulator.txt
+++ /dev/null
-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 {
- };
+++ /dev/null
-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;
- };
+++ /dev/null
-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>;
- };
- };
+++ /dev/null
-88pm860x-backlight bindings
-
-Optional properties:
- - maxim,max8925-dual-string: whether support dual string
-
-Example:
-
- backlights {
- maxim,max8925-dual-string = <0>;
- };
+++ /dev/null
-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>;
-};
+++ /dev/null
-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>;
- };
+++ /dev/null
-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>;
- };
+++ /dev/null
-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>;
- };
- };
-
projects / linux-drm-fsl-dcu.git / commitdiff