On Wed, Jun 17, 2026 at 11:00:18AM +0300, Svyatoslav Ryhel wrote:
> Document 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 <[email protected]>
> Reviewed-by: Jonathan Cameron <[email protected]> #for light sensor
> Reviewed-by: Daniel Thompson (RISCstar) <[email protected]> #for backlight
> Reviewed-by: Rob Herring (Arm) <[email protected]>
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + led-controller@36 {
> + compatible = "ti,lm3533";
> + reg = <0x36>;
> +
> + enable-gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
> + vin-supply = <&vdd_3v3_bat>;
> +
> + ti,boost-ovp-microvolt = <24000000>;
> + ti,boost-freq-hz = <500000>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + backlight@0 {
> + compatible = "ti,lm3533-backlight";
> + reg = <0>;
> +
> + default-brightness = <113>;
> +
> + led-max-microamp = <23400>;
> + led-sources = <0 1>;
> + };
> +
> + led@2 {
> + compatible = "ti,lm3533-leds";
> + reg = <2>;
> +
> + led-max-microamp = <23400>;
> + led-sources = <0 1>;
> + };
> +
> + led@4 {
> + compatible = "ti,lm3533-leds";
> + reg = <4>;
> +
> + led-max-microamp = <23400>;
> + led-sources = <2>;
> + };
> +
> + led@5 {
> + compatible = "ti,lm3533-leds";
> + reg = <5>;
> +
> + led-max-microamp = <23400>;
> + led-sources = <3 4>;
> + };
> +
> + light-sensor {
Doesn't the binding (or dts) checker complain about this node not having
an address?
> + compatible = "ti,lm3533-als";
> +
> + interrupt-parent = <&gpio>;
> + interrupts = <80 IRQ_TYPE_LEVEL_LOW>;
> +
> + ti,pwm-mode;
> + };
> + };
> + };
> +...
Johan
