1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/fsl,vf610-adc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ADC found on Freescale vf610 and similar SoCs
maintainers:
- Haibo Chen <haibo.chen@nxp.com>
description:
ADCs found on vf610/i.MX6slx and upward SoCs from Freescale.
properties:
compatible:
oneOf:
- items:
- enum:
- fsl,imx6sx-adc
- fsl,imx6ul-adc
- const: fsl,vf610-adc
- items:
- const: fsl,vf610-adc
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
description: ADC source clock (ipg clock)
maxItems: 1
clock-names:
const: adc
vref-supply:
description: ADC reference voltage supply.
fsl,adck-max-frequency:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 3
maxItems: 3
description: |
Maximum frequencies from datasheet operating requirements.
Three values necessary to cover the 3 conversion modes.
* Frequency in normal mode (ADLPC=0, ADHSC=0)
* Frequency in high-speed mode (ADLPC=0, ADHSC=1)
* Frequency in low-power mode (ADLPC=1, ADHSC=0)
min-sample-time:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Minimum sampling time in nanoseconds. This value has
to be chosen according to the conversion mode and the connected analog
source resistance (R_as) and capacitance (C_as). Refer the datasheet's
operating requirements. A safe default across a wide range of R_as and
C_as as well as conversion modes is 1000ns.
"#io-channel-cells":
const: 1
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- vref-supply
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/vf610-clock.h>
adc@4003b000 {
compatible = "fsl,vf610-adc";
reg = <0x4003b000 0x1000>;
interrupts = <0 53 0x04>;
clocks = <&clks VF610_CLK_ADC0>;
clock-names = "adc";
fsl,adck-max-frequency = <30000000>, <40000000>, <20000000>;
vref-supply = <®_vcc_3v3_mcu>;
min-sample-time = <10000>;
};
...
|
