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dts: bindings: add modem binding for u-blox SARA-R4

The SARA-R4 series modules from U-Blox are size-optimized LTE-M /
NB-IoT and EGPRS modules designed for low power consumption and
longer battery life.

The binding identifies the UART device, power GPIO and reset GPIO
lines.

Signed-off-by: Michael Scott <mike@foundries.io>
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mike-scott authored and nashif committed May 17, 2019
1 parent 3fce0f2 commit 769b65ef98c14820b8dfaad79f143b91d7c804fb
Showing with 37 additions and 0 deletions.
  1. +37 −0 dts/bindings/modem/ublox,sara-r4.yaml
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#
# Copyright (c) 2019, Foundries.io
#
# SPDX-License-Identifier: Apache-2.0
#
---
title: u-blox SARA-R4 modem
version: 0.1

description: >
This is a representation of the u-blox SARA-R4 modem.
inherits:
!include uart-device.yaml

properties:
compatible:
type: string
category: required
constraint: "ublox,sara-r4"
generation: define

label:
type: string
category: required
generation: define

mdm-power-gpios:
type: compound
category: required
generation: define, use-prop-name

mdm-reset-gpios:
type: compound
category: required
generation: define, use-prop-name
...

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