blob: fa50769c850d17f6286b826cf6a2cf21c6eb13b3 (
plain)
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
|
/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* IT83xx DAC module for Chrome EC */
#ifndef __CROS_EC_DAC_CHIP_H
#define __CROS_EC_DAC_CHIP_H
#define DAC_AVCC 3300
/*
* Each channel generates an output ranging
* from 0V to AVCC with 8-bit resolution.
*/
#define DAC_RAW_DATA (BIT(8) - 1)
/* List of DAC channels. */
enum chip_dac_channel {
CHIP_DAC_CH2 = 2,
CHIP_DAC_CH3,
CHIP_DAC_CH4,
CHIP_DAC_CH5,
};
/**
* DAC module enable.
*
* @param ch Channel to enable.
*/
void dac_enable_channel(enum chip_dac_channel ch);
/**
* DAC module disable.
*
* @param ch Channel to disable.
*/
void dac_disable_channel(enum chip_dac_channel ch);
/**
* Set DAC output voltage.
*
* @param ch Channel to set.
* @param mv Setting ch output voltage.
*/
void dac_set_output_voltage(enum chip_dac_channel ch, int mv);
/**
* Get DAC output voltage.
*
* @param ch Channel to get.
*
* @return Getting ch output voltage.
*/
int dac_get_output_voltage(enum chip_dac_channel ch);
#endif /* __CROS_EC_DAC_CHIP_H */
|
