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Thu, 28 May 2026 06:51:49 -0700 (PDT) From: Svyatoslav Ryhel To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Helge Deller , Svyatoslav Ryhel Cc: Johan Hovold , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [PATCH v2 1/6] dt-bindings: leds: Document TI LM3533 LED controller Date: Thu, 28 May 2026 16:51:18 +0300 Message-ID: <20260528135123.103745-2-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260528135123.103745-1-clamor95@gmail.com> References: <20260528135123.103745-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- .../leds/backlight/ti,lm3533-backlight.yaml | 68 +++++++ .../bindings/leds/ti,lm3533-leds.yaml | 66 +++++++ .../devicetree/bindings/leds/ti,lm3533.yaml | 170 ++++++++++++++++++ 3 files changed, 304 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3533.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml new file mode 100644 index 000000000000..866b0fb8ed04 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml @@ -0,0 +1,68 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/ti,lm3533-backlight.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LM3533 high voltage series LED strings + +description: + This is part of the TI LM3533 MFD device. It represents two high voltage series + LED strings for display backlight controlled by the TI LM3533. + +maintainers: + - Svyatoslav Ryhel + +allOf: + - $ref: /schemas/leds/backlight/common.yaml# + +properties: + compatible: + const: ti,lm3533-backlight + + reg: + description: Control bank selection (0 = bank A, 1 = bank B). + maximum: 1 + + led-max-microamp: + description: maximum current in uA with a 800 uA step. + minimum: 5000 + maximum: 29800 + default: 5000 + + led-sources: + description: | + HVLED strings associated with this control bank: + 0 - HVLED1 + 1 - HVLED2 + minItems: 1 + maxItems: 2 + items: + maximum: 1 + + ti,pwm-config-mask: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Control Bank PWM Configuration Register mask that allows to configure + PWM input in Zones 0-4 + BIT(0) - PWM Input is enabled + BIT(1) - PWM Input is enabled in Zone 0 + BIT(2) - PWM Input is enabled in Zone 1 + BIT(3) - PWM Input is enabled in Zone 2 + BIT(4) - PWM Input is enabled in Zone 3 + BIT(5) - PWM Input is enabled in Zone 4 + + ti,linear-mapping-mode: + description: + Enable linear mapping mode. If disabled, then it will use exponential + mapping mode in which the ramp up/down appears to have a more uniform + transition to the human eye. + type: boolean + +required: + - compatible + - reg + +unevaluatedProperties: false + +# see ti,lm3533.yaml for an example diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml new file mode 100644 index 000000000000..a321926de62e --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/ti,lm3533-leds.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI LM3533 low voltage control banks for individual LEDs + +description: + This is part of the TI LM3533 MFD device. It represents four low voltage + control banks for individual LEDs provided by the TI LM3533. + +maintainers: + - Svyatoslav Ryhel + +allOf: + - $ref: /schemas/leds/common.yaml# + +properties: + compatible: + const: ti,lm3533-leds + + reg: + description: + Control bank selection (2 = bank C, 3 = bank D, 4 = bank E, 5 = bank F). + minimum: 2 + maximum: 5 + + led-max-microamp: + description: maximum current in uA with a 800 uA step. + minimum: 5000 + maximum: 29800 + default: 5000 + + led-sources: + description: | + LVLED associated with this control bank. May be more than 1 source per bank. + 0 - LVLED1 + 1 - LVLED2 + 2 - LVLED3 + 3 - LVLED4 + 4 - LVLED5 + minItems: 1 + maxItems: 5 + items: + maximum: 4 + + ti,pwm-config-mask: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Control Bank PWM Configuration Register mask that allows to configure + PWM input in Zones 0-4 + BIT(0) - PWM Input is enabled + BIT(1) - PWM Input is enabled in Zone 0 + BIT(2) - PWM Input is enabled in Zone 1 + BIT(3) - PWM Input is enabled in Zone 2 + BIT(4) - PWM Input is enabled in Zone 3 + BIT(5) - PWM Input is enabled in Zone 4 + +required: + - compatible + - reg + +unevaluatedProperties: false + +# see ti,lm3533.yaml for an example diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml new file mode 100644 index 000000000000..6e12e12be08e --- /dev/null +++ b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml @@ -0,0 +1,170 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/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 high voltage series LED strings for display backlight and four low + voltage control banks for individual LEDs. Additionally, LM3533 features an + interface for an external light sensor. + + https://www.ti.com/product/LM3533 + +maintainers: + - Svyatoslav Ryhel + +properties: + compatible: + const: ti,lm3533 + + reg: + maxItems: 1 + + enable-gpios: + description: GPIO connected to the HWEN pin. + maxItems: 1 + + vin-supply: + description: Supply connected to the IN line (2.7 V to 5.5 V). + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + 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: + type: object + additionalProperties: false + + properties: + compatible: + const: ti,lm3533-als + + interrupts: + maxItems: 1 + + ti,resistor-ohm: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Internal configuration resister value when light sensor is in + Analog Sensor mode and PWM mode is disabled. The expectation is + the input is a current from the external analog light sensor and + this is used to convert it to a voltage within the target range. + minimum: 1575 + maximum: 200000 + + ti,pwm-mode: + type: boolean + description: + Switch for mode in which light sensor interface is running. If + this property is set then the light sensor interface is running + in PWM mode, internal resistor value is set to high-impedance (0) + and ti,resistor-ohm property is ignored. + + required: + - compatible + + oneOf: + - required: + - ti,resistor-ohm + - required: + - ti,pwm-mode + +patternProperties: + "^backlight@[01]$": + $ref: /schemas/leds/backlight/ti,lm3533-backlight.yaml# + + "^led@[2-5]$": + $ref: /schemas/leds/ti,lm3533-leds.yaml# + +required: + - compatible + - reg + - '#address-cells' + - '#size-cells' + +additionalProperties: false + +examples: + - | + #include + #include + + 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 { + compatible = "ti,lm3533-als"; + + interrupt-parent = <&gpio>; + interrupts = <80 IRQ_TYPE_LEVEL_LOW>; + + ti,pwm-mode; + }; + }; + }; +... -- 2.51.0