102 lines
3.1 KiB
YAML
102 lines
3.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/hwmon/adi,ltc2947.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Analog Devices LTC2947 high precision power and energy monitor
|
|
|
|
maintainers:
|
|
- Nuno Sá <nuno.sa@analog.com>
|
|
|
|
description: |
|
|
Analog Devices LTC2947 high precision power and energy monitor over SPI or I2C.
|
|
|
|
https://www.analog.com/media/en/technical-documentation/data-sheets/LTC2947.pdf
|
|
|
|
properties:
|
|
compatible:
|
|
enum:
|
|
- adi,ltc2947
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
clocks:
|
|
description:
|
|
The LTC2947 uses either a trimmed internal oscillator or an external clock
|
|
as the time base for determining the integration period to represent time,
|
|
charge and energy. When an external clock is used, this property must be
|
|
set accordingly.
|
|
maxItems: 1
|
|
|
|
adi,accumulator-ctl-pol:
|
|
description:
|
|
This property controls the polarity of current that is accumulated to
|
|
calculate charge and energy so that, they can be only accumulated for
|
|
positive current for example. Since there are two sets of registers for
|
|
the accumulated values, this entry can also have two items which sets
|
|
energy1/charge1 and energy2/charger2 respectively. Check table 12 of the
|
|
datasheet for more information on the supported options.
|
|
$ref: /schemas/types.yaml#/definitions/uint32-array
|
|
minItems: 2
|
|
maxItems: 2
|
|
items:
|
|
enum: [0, 1, 2, 3]
|
|
default: 0
|
|
|
|
adi,accumulation-deadband-microamp:
|
|
description:
|
|
This property controls the Accumulation Dead band which allows to set the
|
|
level of current below which no accumulation takes place.
|
|
maximum: 255
|
|
default: 0
|
|
|
|
adi,gpio-out-pol:
|
|
description:
|
|
This property controls the GPIO polarity. Setting it to one makes the GPIO
|
|
active high, setting it to zero makets it active low. When this property
|
|
is present, the GPIO is automatically configured as output and set to
|
|
control a fan as a function of measured temperature.
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
enum: [0, 1]
|
|
default: 0
|
|
|
|
adi,gpio-in-accum:
|
|
description:
|
|
When set, this property sets the GPIO as input. It is then used to control
|
|
the accumulation of charge, energy and time. This function can be
|
|
enabled/configured separately for each of the two sets of accumulation
|
|
registers. Check table 13 of the datasheet for more information on the
|
|
supported options. This property cannot be used together with
|
|
adi,gpio-out-pol.
|
|
$ref: /schemas/types.yaml#/definitions/uint32-array
|
|
minItems: 2
|
|
maxItems: 2
|
|
items:
|
|
enum: [0, 1, 2]
|
|
default: 0
|
|
|
|
required:
|
|
- compatible
|
|
- reg
|
|
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
- |
|
|
spi {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
|
|
ltc2947_spi: ltc2947@0 {
|
|
compatible = "adi,ltc2947";
|
|
reg = <0>;
|
|
/* accumulation takes place always for energ1/charge1. */
|
|
/* accumulation only on positive current for energy2/charge2. */
|
|
adi,accumulator-ctl-pol = <0 1>;
|
|
};
|
|
};
|
|
...
|