Add bindings for the LM3533 - a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for two series LED strings display backlight and keypad functions. Signed-off-by: Svyatoslav Ryhel <clamor95@xxxxxxxxx> --- .../devicetree/bindings/mfd/ti,lm3533.yaml | 231 ++++++++++++++++++ 1 file changed, 231 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/ti,lm3533.yaml diff --git a/Documentation/devicetree/bindings/mfd/ti,lm3533.yaml b/Documentation/devicetree/bindings/mfd/ti,lm3533.yaml new file mode 100644 index 000000000000..83542f0c7bf7 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/ti,lm3533.yaml @@ -0,0 +1,231 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/ti,lm3533.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LM3533 Complete Lighting Power Solution + +description: | + The LM3533 is a complete power source for backlight, + keypad, and indicator LEDs in smartphone handsets. The + high-voltage inductive boost converter provides the + power for two series LED strings display backlight and + keypad functions. + https://www.ti.com/product/LM3533 + +maintainers: + - Svyatoslav Ryhel <clamor95@xxxxxxxxx> + +properties: + compatible: + const: ti,lm3533 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + enable-gpios: + description: GPIO to use to enable/disable the backlight (HWEN pin). + maxItems: 1 + + ti,boost-ovp-microvolt: + description: + Boost OVP select (16V, 24V, 32V, 40V) + enum: [ 16000000, 24000000, 32000000, 40000000 ] + default: 16000000 + + ti,boost-freq-hz: + description: + Boost frequency select (500KHz or 1MHz) + enum: [ 500000, 1000000 ] + default: 500000 + + light-sensor@0: + type: object + description: + Properties for an illumination sensor. + + properties: + compatible: + const: ti,lm3533-als + + reg: + const: 0 + + ti,resistor-value-ohm: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Internal configuration resister value when ALS is in Analog Sensor + mode and PWM mode is disabled. + minimum: 1575 + maximum: 200000 + + ti,pwm-mode: + type: boolean + description: | + Switch for mode in which ALS is running. If this propertly is + set then ALS is running in PWM mode, internal resistor value is + set to high-impedance (0) and resistor-value-ohm propertly is + ignored. + + required: + - compatible + - reg + + additionalProperties: false + +required: + - compatible + - reg + - '#address-cells' + - '#size-cells' + - enable-gpios + +patternProperties: + "^backlight@[01]$": + type: object + description: + Properties for a backlight device. + + $ref: /schemas/leds/backlight/common.yaml# + + properties: + compatible: + const: ti,lm3533-backlight + + reg: + description: | + The control bank that is used to program the two current sinks. The + LM3533 has two control banks (A and B) and are represented as 0 or 1 + in this property. The two current sinks can be controlled + independently with both banks, or bank A can be configured to control + both sinks with the led-sources property. + minimum: 0 + maximum: 1 + + default-brightness: true + + ti,max-current-microamp: + description: + Maximum current in µA with a 800 µA step. + enum: [ 5000, 5800, 6600, 7400, 8200, 9000, 9800, + 10600, 11400, 12200, 13000, 13800, 14600, + 15400, 16200, 17000, 17800, 18600, 19400, + 20200, 21000, 21800, 22600, 23400, 24200, + 25000, 25800, 26600, 27400, 28200, 29000, + 29800 ] + default: 5000 + + ti,pwm-config-mask: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Control Bank PWM Configuration Register mask that allows to configure + PWM input in Zones 0-4 + BIT(0) - PWM Input is enabled + BIT(1) - PWM Input is enabled in Zone 0 + BIT(2) - PWM Input is enabled in Zone 1 + BIT(3) - PWM Input is enabled in Zone 2 + BIT(4) - PWM Input is enabled in Zone 3 + BIT(5) - PWM Input is enabled in Zone 4 + + ti,linear-mapping-mode: + description: | + Enable linear mapping mode. If disabled, then it will use exponential + mapping mode in which the ramp up/down appears to have a more uniform + transition to the human eye. + type: boolean + + ti,hardware-controlled: + description: | + Each backlight has its own voltage Control Bank (A and B) and there are + two HVLED sinks which by default are linked to respective Bank. Setting + this property will link both sinks to a Control Bank of backlight where + property is defined. + type: boolean + + required: + - compatible + - reg + + additionalProperties: false + + "^led@[0-3]$": + type: object + description: + Properties for a led device. + + $ref: /schemas/leds/common.yaml# + + properties: + compatible: + const: ti,lm3533-leds + + reg: + description: + 4 led banks + minimum: 0 + maximum: 3 + + linux,default-trigger: true + + ti,max-current-microamp: + description: + Maximum current in µA with a 800 µA step. + enum: [ 5000, 5800, 6600, 7400, 8200, 9000, 9800, + 10600, 11400, 12200, 13000, 13800, 14600, + 15400, 16200, 17000, 17800, 18600, 19400, + 20200, 21000, 21800, 22600, 23400, 24200, + 25000, 25800, 26600, 27400, 28200, 29000, + 29800 ] + default: 5000 + + ti,pwm-config-mask: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Same descryption and function as for backlight. + + required: + - compatible + - reg + + additionalProperties: false + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + led-controller@36 { + compatible = "ti,lm3533"; + reg = <0x36>; + + enable-gpios = <&gpio 110 GPIO_ACTIVE_HIGH>; + + ti,boost-ovp-microvolt = <24000000>; + ti,boost-freq-hz = <500000>; + + #address-cells = <1>; + #size-cells = <0>; + + backlight@0 { + compatible = "ti,lm3533-backlight"; + reg = <0>; + + ti,max-current-microamp = <23400>; + default-brightness = <113>; + ti,hardware-controlled; + }; + }; + }; +... -- 2.43.0
