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 };
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