linux/Documentation/devicetree/bindings/mfd/netronix,ntxec.yaml
Jonathan Neuschäfer 01929c7133 dt-bindings: mfd: Add binding for Netronix embedded controller
This EC is found in e-book readers of multiple brands (e.g. Kobo,
Tolino), and is typically implemented as a TI MSP430 microcontroller.

It controls different functions of the system, such as power on/off,
RTC, PWM for the backlight. The exact functionality provided can vary
between boards.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2021-03-10 11:06:25 +00:00

77 lines
1.9 KiB
YAML

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/netronix,ntxec.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Netronix Embedded Controller
maintainers:
- Jonathan Neuschäfer <j.neuschaefer@gmx.net>
description: |
This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and
is typically implemented as a TI MSP430 microcontroller.
properties:
compatible:
const: netronix,ntxec
reg:
items:
- description: The I2C address of the EC
system-power-controller:
type: boolean
description: See Documentation/devicetree/bindings/power/power-controller.txt
interrupts:
minItems: 1
description:
The EC can signal interrupts via a GPIO line
"#pwm-cells":
const: 2
description: |
Number of cells in a PWM specifier.
The following PWM channels are supported:
- 0: The PWM channel controlled by registers 0xa1-0xa7
required:
- compatible
- reg
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
ec: embedded-controller@43 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ntxec>;
compatible = "netronix,ntxec";
reg = <0x43>;
system-power-controller;
interrupt-parent = <&gpio4>;
interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
#pwm-cells = <2>;
};
};
backlight {
compatible = "pwm-backlight";
pwms = <&ec 0 50000>;
power-supply = <&backlight_regulator>;
};
backlight_regulator: regulator-dummy {
compatible = "regulator-fixed";
regulator-name = "backlight";
};