forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
4.7 KiB
166 lines
4.7 KiB
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
|
%YAML 1.2 |
|
--- |
|
$id: http://devicetree.org/schemas/iio/adc/qcom,pm8018-adc.yaml# |
|
$schema: http://devicetree.org/meta-schemas/core.yaml# |
|
|
|
title: Qualcomm's PM8xxx voltage XOADC |
|
|
|
maintainers: |
|
- Linus Walleij <[email protected]> |
|
|
|
description: | |
|
The Qualcomm PM8xxx PMICs contain a HK/XO ADC (Housekeeping/Crystal |
|
oscillator ADC) encompassing PM8018, PM8038, PM8058 and PM8921. |
|
|
|
properties: |
|
compatible: |
|
enum: |
|
- qcom,pm8018-adc |
|
- qcom,pm8038-adc |
|
- qcom,pm8058-adc |
|
- qcom,pm8921-adc |
|
|
|
reg: |
|
maxItems: 1 |
|
description: |
|
ADC base address in the PMIC, typically 0x197. |
|
|
|
xoadc-ref-supply: |
|
description: |
|
The reference voltage may vary with PMIC variant but is typically |
|
something like 2.2 or 1.8V. |
|
|
|
interrupts: |
|
maxItems: 1 |
|
|
|
"#address-cells": |
|
const: 2 |
|
description: |
|
The first cell is the prescaler (on PM8058) or premux (on PM8921) |
|
with two valid bits so legal values are 0x00, 0x01 or 0x02. |
|
The second cell is the main analog mux setting (0x00..0x0f). |
|
The combination of prescaler/premux and analog mux uniquely addresses |
|
a hardware channel on all systems. |
|
|
|
"#size-cells": |
|
const: 0 |
|
|
|
"#io-channel-cells": |
|
const: 2 |
|
description: |
|
The cells are precaler or premux followed by the analog muxing line. |
|
|
|
additionalProperties: false |
|
|
|
required: |
|
- compatible |
|
- reg |
|
- "#io-channel-cells" |
|
- "#address-cells" |
|
- "#size-cells" |
|
- adc-channel@c |
|
- adc-channel@d |
|
- adc-channel@f |
|
|
|
patternProperties: |
|
"^(adc-channel@)[0-9a-f]$": |
|
type: object |
|
description: | |
|
ADC channel specific configuration. |
|
Note that channels c, d and f must be present for calibration. |
|
These three nodes are used for absolute and ratiometric calibration |
|
and only need to have these reg values: they are by hardware definition |
|
1:1 ratio converters that sample 625, 1250 and 0 milliV and create |
|
an interpolation calibration for all other ADCs. |
|
|
|
properties: |
|
reg: |
|
maxItems: 1 |
|
|
|
qcom,decimation: |
|
$ref: /schemas/types.yaml#/definitions/uint32 |
|
description: | |
|
This parameter is used to decrease the ADC sampling rate. |
|
Quicker measurements can be made by reducing the decimation ratio. |
|
Valid values are 512, 1024, 2048, 4096. |
|
If the property is not found, a default value of 512 will be used. |
|
|
|
qcom,ratiometric: |
|
$ref: /schemas/types.yaml#/definitions/uint32 |
|
description: | |
|
Channel calibration type. If this property is specified |
|
VADC will use a special voltage references for channel |
|
calibration. The available references are specified in the |
|
as a u32 value setting (see below) and it is compulsory |
|
to also specify this reference if ratiometric calibration |
|
is selected. |
|
|
|
If the property is not found, the channel will be |
|
calibrated with the 0.625V and 1.25V reference channels, also |
|
known as an absolute calibration. |
|
|
|
The reference voltage pairs when using ratiometric calibration: |
|
0 = XO_IN/XOADC_GND |
|
1 = PMIC_IN/XOADC_GND |
|
2 = PMIC_IN/BMS_CSP |
|
3 (invalid) |
|
4 = XOADC_GND/XOADC_GND |
|
5 = XOADC_VREF/XOADC_GND |
|
|
|
additionalProperties: false |
|
|
|
required: |
|
- reg |
|
|
|
examples: |
|
- | |
|
#include <dt-bindings/interrupt-controller/irq.h> |
|
pmic { |
|
#address-cells = <1>; |
|
#size-cells = <0>; |
|
|
|
adc@197 { |
|
compatible = "qcom,pm8058-adc"; |
|
reg = <0x197>; |
|
interrupts-extended = <&pm8058 76 IRQ_TYPE_EDGE_RISING>; |
|
#address-cells = <2>; |
|
#size-cells = <0>; |
|
#io-channel-cells = <2>; |
|
|
|
vcoin: adc-channel@0 { |
|
reg = <0x00 0x00>; |
|
}; |
|
vbat: adc-channel@1 { |
|
reg = <0x00 0x01>; |
|
}; |
|
dcin: adc-channel@2 { |
|
reg = <0x00 0x02>; |
|
}; |
|
ichg: adc-channel@3 { |
|
reg = <0x00 0x03>; |
|
}; |
|
vph_pwr: adc-channel@4 { |
|
reg = <0x00 0x04>; |
|
}; |
|
usb_vbus: adc-channel@a { |
|
reg = <0x00 0x0a>; |
|
}; |
|
die_temp: adc-channel@b { |
|
reg = <0x00 0x0b>; |
|
}; |
|
ref_625mv: adc-channel@c { |
|
reg = <0x00 0x0c>; |
|
}; |
|
ref_1250mv: adc-channel@d { |
|
reg = <0x00 0x0d>; |
|
}; |
|
ref_325mv: adc-channel@e { |
|
reg = <0x00 0x0e>; |
|
}; |
|
ref_muxoff: adc-channel@f { |
|
reg = <0x00 0x0f>; |
|
}; |
|
}; |
|
}; |
|
...
|
|
|