| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/mfd/netronix,ntxec.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Netronix Embedded Controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Jonathan Neuschäfer <j.neuschaefer@gmx.net> |
| 11 | |
| 12 | description: | |
| 13 | This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and |
| 14 | is typically implemented as a TI MSP430 microcontroller. |
| 15 | |
| 16 | properties: |
| 17 | compatible: |
| 18 | const: netronix,ntxec |
| 19 | |
| 20 | reg: |
| 21 | items: |
| 22 | - description: The I2C address of the EC |
| 23 | |
| 24 | system-power-controller: |
| 25 | type: boolean |
| 26 | description: See Documentation/devicetree/bindings/power/power-controller.txt |
| 27 | |
| 28 | interrupts: |
| 29 | minItems: 1 |
| 30 | description: |
| 31 | The EC can signal interrupts via a GPIO line |
| 32 | |
| 33 | "#pwm-cells": |
| 34 | const: 2 |
| 35 | description: | |
| 36 | Number of cells in a PWM specifier. |
| 37 | |
| 38 | The following PWM channels are supported: |
| 39 | - 0: The PWM channel controlled by registers 0xa1-0xa7 |
| 40 | |
| 41 | required: |
| 42 | - compatible |
| 43 | - reg |
| 44 | |
| 45 | additionalProperties: false |
| 46 | |
| 47 | examples: |
| 48 | - | |
| 49 | #include <dt-bindings/interrupt-controller/irq.h> |
| 50 | i2c { |
| 51 | #address-cells = <1>; |
| 52 | #size-cells = <0>; |
| 53 | |
| 54 | ec: embedded-controller@43 { |
| 55 | pinctrl-names = "default"; |
| 56 | pinctrl-0 = <&pinctrl_ntxec>; |
| 57 | |
| 58 | compatible = "netronix,ntxec"; |
| 59 | reg = <0x43>; |
| 60 | system-power-controller; |
| 61 | interrupt-parent = <&gpio4>; |
| 62 | interrupts = <11 IRQ_TYPE_EDGE_FALLING>; |
| 63 | #pwm-cells = <2>; |
| 64 | }; |
| 65 | }; |
| 66 | |
| 67 | backlight { |
| 68 | compatible = "pwm-backlight"; |
| 69 | pwms = <&ec 0 50000>; |
| 70 | power-supply = <&backlight_regulator>; |
| 71 | }; |
| 72 | |
| 73 | backlight_regulator: regulator-dummy { |
| 74 | compatible = "regulator-fixed"; |
| 75 | regulator-name = "backlight"; |
| 76 | }; |