1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Device driver for regulators in MAX5970 and MAX5978 IC
4 *
5 * Copyright (c) 2022 9elements GmbH
6 *
7 * Author: Patrick Rudolph <patrick.rudolph@9elements.com>
8 */
9
10 #ifndef _MFD_MAX5970_H
11 #define _MFD_MAX5970_H
12
13 #include <linux/regmap.h>
14
15 #define MAX5970_NUM_SWITCHES 2
16 #define MAX5978_NUM_SWITCHES 1
17 #define MAX5970_NUM_LEDS 4
18
19 struct max5970_data {
20 int num_switches;
21 u32 irng[MAX5970_NUM_SWITCHES];
22 u32 mon_rng[MAX5970_NUM_SWITCHES];
23 u32 shunt_micro_ohms[MAX5970_NUM_SWITCHES];
24 };
25
26 enum max5970_chip_type {
27 TYPE_MAX5978 = 1,
28 TYPE_MAX5970,
29 };
30
31 #define MAX5970_REG_CURRENT_L(ch) (0x01 + (ch) * 4)
32 #define MAX5970_REG_CURRENT_H(ch) (0x00 + (ch) * 4)
33 #define MAX5970_REG_VOLTAGE_L(ch) (0x03 + (ch) * 4)
34 #define MAX5970_REG_VOLTAGE_H(ch) (0x02 + (ch) * 4)
35 #define MAX5970_REG_MON_RANGE 0x18
36 #define MAX5970_MON_MASK 0x3
37 #define MAX5970_MON(reg, ch) (((reg) >> ((ch) * 2)) & MAX5970_MON_MASK)
38 #define MAX5970_MON_MAX_RANGE_UV 16000000
39
40 #define MAX5970_REG_CH_UV_WARN_H(ch) (0x1A + (ch) * 10)
41 #define MAX5970_REG_CH_UV_WARN_L(ch) (0x1B + (ch) * 10)
42 #define MAX5970_REG_CH_UV_CRIT_H(ch) (0x1C + (ch) * 10)
43 #define MAX5970_REG_CH_UV_CRIT_L(ch) (0x1D + (ch) * 10)
44 #define MAX5970_REG_CH_OV_WARN_H(ch) (0x1E + (ch) * 10)
45 #define MAX5970_REG_CH_OV_WARN_L(ch) (0x1F + (ch) * 10)
46 #define MAX5970_REG_CH_OV_CRIT_H(ch) (0x20 + (ch) * 10)
47 #define MAX5970_REG_CH_OV_CRIT_L(ch) (0x21 + (ch) * 10)
48
49 #define MAX5970_VAL2REG_H(x) (((x) >> 2) & 0xFF)
50 #define MAX5970_VAL2REG_L(x) ((x) & 0x3)
51
52 #define MAX5970_REG_DAC_FAST(ch) (0x2E + (ch))
53
54 #define MAX5970_FAST2SLOW_RATIO 200
55
56 #define MAX5970_REG_STATUS0 0x31
57 #define MAX5970_CB_IFAULTF(ch) (1 << (ch))
58 #define MAX5970_CB_IFAULTS(ch) (1 << ((ch) + 4))
59
60 #define MAX5970_REG_STATUS1 0x32
61 #define STATUS1_PROT_MASK 0x3
62 #define STATUS1_PROT(reg) \
63 (((reg) >> 6) & STATUS1_PROT_MASK)
64 #define STATUS1_PROT_SHUTDOWN 0
65 #define STATUS1_PROT_CLEAR_PG 1
66 #define STATUS1_PROT_ALERT_ONLY 2
67
68 #define MAX5970_REG_STATUS2 0x33
69 #define MAX5970_IRNG_MASK 0x3
70 #define MAX5970_IRNG(reg, ch) \
71 (((reg) >> ((ch) * 2)) & MAX5970_IRNG_MASK)
72
73 #define MAX5970_REG_STATUS3 0x34
74 #define MAX5970_STATUS3_ALERT BIT(4)
75 #define MAX5970_STATUS3_PG(ch) BIT(ch)
76
77 #define MAX5970_REG_FAULT0 0x35
78 #define UV_STATUS_WARN(ch) (1 << (ch))
79 #define UV_STATUS_CRIT(ch) (1 << ((ch) + 4))
80
81 #define MAX5970_REG_FAULT1 0x36
82 #define OV_STATUS_WARN(ch) (1 << (ch))
83 #define OV_STATUS_CRIT(ch) (1 << ((ch) + 4))
84
85 #define MAX5970_REG_FAULT2 0x37
86 #define OC_STATUS_WARN(ch) (1 << (ch))
87
88 #define MAX5970_REG_CHXEN 0x3b
89 #define CHXEN(ch) (3 << ((ch) * 2))
90
91 #define MAX5970_REG_LED_FLASH 0x43
92
93 #define MAX_REGISTERS 0x49
94 #define ADC_MASK 0x3FF
95
96 #endif /* _MFD_MAX5970_H */
97
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