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dt-bindings: rtc: convert at91sam9 bindings to json-schema

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Convert RTC binding for Atmel/Microchip SoCs to Device Tree Schema
format.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220304161159.147784-4-sergiu.moga@microchip.com
This commit is contained in:
Sergiu Moga 2022-03-04 18:11:58 +02:00 committed by Alexandre Belloni
parent 73ce053020
commit 5b05198b31
2 changed files with 65 additions and 25 deletions
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25
Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt
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Atmel AT91SAM9260 Real Time Timer
Required properties:
- compatible: should be one of the following:
- "atmel,at91sam9260-rtt"
- "microchip,sam9x60-rtt", "atmel,at91sam9260-rtt"
- reg: should encode the memory region of the RTT controller
- interrupts: rtt alarm/event interrupt
- clocks: should contain the 32 KHz slow clk that will drive the RTT block.
- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store
the time base when the RTT is used as an RTC.
The first cell should point to the GPBR node and the second one
encode the offset within the GPBR block (or in other words, the
GPBR register used to store the time base).
Example:
rtt@fffffd20 {
compatible = "atmel,at91sam9260-rtt";
reg = <0xfffffd20 0x10>;
interrupts = <1 4 7>;
clocks = <&clk32k>;
atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
};

65
Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
%YAML 1.2
---
$id: http://devicetree.org/schemas/rtc/atmel,at91sam9-rtc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Atmel AT91 RTT Device Tree Bindings
allOf:
- $ref: "rtc.yaml#"
maintainers:
- Alexandre Belloni <alexandre.belloni@bootlin.com>
properties:
compatible:
oneOf:
- items:
- const: atmel,at91sam9260-rtt
- items:
- const: microchip,sam9x60-rtt
- const: atmel,at91sam9260-rtt
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
atmel,rtt-rtc-time-reg:
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
- items:
- description: Phandle to the GPBR node.
- description: Offset within the GPBR block.
description:
Should encode the GPBR register used to store the time base when the
RTT is used as an RTC. The first cell should point to the GPBR node
and the second one encodes the offset within the GPBR block (or in
other words, the GPBR register used to store the time base).
required:
- compatible
- reg
- interrupts
- clocks
- atmel,rtt-rtc-time-reg
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
rtc@fffffd20 {
compatible = "atmel,at91sam9260-rtt";
reg = <0xfffffd20 0x10>;
interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;
clocks = <&clk32k>;
atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
};