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Message-ID: <20250218132702.114669-2-clamor95@gmail.com>
Date: Tue, 18 Feb 2025 15:26:59 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Lee Jones <lee@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Pavel Machek <pavel@....cz>,
Daniel Thompson <danielt@...nel.org>,
Jingoo Han <jingoohan1@...il.com>,
Helge Deller <deller@....de>,
Svyatoslav Ryhel <clamor95@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Uwe Kleine-König <u.kleine-koenig@...libre.com>
Cc: devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-iio@...r.kernel.org,
linux-leds@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
linux-fbdev@...r.kernel.org
Subject: [PATCH v2 1/2] dt-bindings: mfd: Document TI LM3533 MFD
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@...il.com>
---
.../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@...il.com>
+
+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
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