| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Texas Instruments - LM3692x Highly Efficient White LED Driver |
| 2 | |
| 3 | The LM3692x is an ultra-compact, highly efficient, |
| 4 | white-LED driver designed for LCD display backlighting. |
| 5 | |
| 6 | The main difference between the LM36922 and LM36923 is the number of |
| 7 | LED strings it supports. The LM36922 supports two strings while the LM36923 |
| 8 | supports three strings. |
| 9 | |
| 10 | Required properties: |
| 11 | - compatible: |
| 12 | "ti,lm36922" |
| 13 | "ti,lm36923" |
| 14 | - reg : I2C slave address |
| 15 | - #address-cells : 1 |
| 16 | - #size-cells : 0 |
| 17 | |
| 18 | Optional properties: |
| 19 | - enable-gpios : gpio pin to enable/disable the device. |
| 20 | - vled-supply : LED supply |
| 21 | - ti,ovp-microvolt: Overvoltage protection in |
| 22 | micro-volt, can be 17000000, 21000000, 25000000 or |
| 23 | 29000000. If ti,ovp-microvolt is not specified it |
| 24 | defaults to 29000000. |
| 25 | |
| 26 | Required child properties: |
| 27 | - reg : 0 - Will enable all LED sync paths |
| 28 | 1 - Will enable the LED1 sync |
| 29 | 2 - Will enable the LED2 sync |
| 30 | 3 - Will enable the LED3 sync (LM36923 only) |
| 31 | |
| 32 | Optional child properties: |
| 33 | - function : see Documentation/devicetree/bindings/leds/common.txt |
| 34 | - color : see Documentation/devicetree/bindings/leds/common.txt |
| 35 | - label : see Documentation/devicetree/bindings/leds/common.txt (deprecated) |
| 36 | - linux,default-trigger : |
| 37 | see Documentation/devicetree/bindings/leds/common.txt |
| 38 | - led-max-microamp : |
| 39 | see Documentation/devicetree/bindings/leds/common.txt |
| 40 | |
| 41 | Example: |
| 42 | |
| 43 | #include <dt-bindings/leds/common.h> |
| 44 | |
| 45 | led-controller@36 { |
| 46 | compatible = "ti,lm3692x"; |
| 47 | reg = <0x36>; |
| 48 | #address-cells = <1>; |
| 49 | #size-cells = <0>; |
| 50 | |
| 51 | enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; |
| 52 | vled-supply = <&vbatt>; |
| 53 | ti,ovp-microvolt = <29000000>; |
| 54 | |
| 55 | led@0 { |
| 56 | reg = <0>; |
| 57 | function = LED_FUNCTION_BACKLIGHT; |
| 58 | color = <LED_COLOR_ID_WHITE>; |
| 59 | linux,default-trigger = "backlight"; |
| 60 | led-max-microamp = <20000>; |
| 61 | }; |
| 62 | } |
| 63 | |
| 64 | For more product information please see the link below: |
| 65 | https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf |