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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/firmware/cznic,turris-omnia-mcu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: CZ.NIC's Turris Omnia MCU
maintainers:
- Marek Behún <kabel@kernel.org>
description:
The MCU on Turris Omnia acts as a system controller providing additional
GPIOs, interrupts, watchdog, system power off and wakeup configuration.
properties:
compatible:
const: cznic,turris-omnia-mcu
reg:
description: MCU I2C slave address
maxItems: 1
interrupts:
maxItems: 1
interrupt-controller: true
'#interrupt-cells':
const: 2
description: |
The first cell specifies the interrupt number (0 to 63), the second cell
specifies interrupt type (which can be one of IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_BOTH).
The interrupt numbers correspond sequentially to GPIO numbers, taking the
GPIO banks into account:
IRQ number GPIO bank GPIO pin within bank
0 - 15 0 0 - 15
16 - 47 1 0 - 31
48 - 63 2 0 - 15
There are several exceptions:
IRQ number meaning
11 LED panel brightness changed by button press
13 TRNG entropy ready
14 ECDSA message signature computation done
gpio-controller: true
'#gpio-cells':
const: 3
description:
The first cell is bank number (0, 1 or 2), the second cell is pin number
within the bank (0 to 15 for banks 0 and 2, 0 to 31 for bank 1), and the
third cell specifies consumer flags.
required:
- compatible
- reg
- interrupts
- interrupt-controller
- gpio-controller
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
system-controller@2a {
compatible = "cznic,turris-omnia-mcu";
reg = <0x2a>;
interrupt-parent = <&gpio1>;
interrupts = <11 IRQ_TYPE_NONE>;
gpio-controller;
#gpio-cells = <3>;
interrupt-controller;
#interrupt-cells = <2>;
};
};
|
