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