1 | /* SPDX-License-Identifier: GPL-2.0 |
2 | * |
3 | * Copyright (C) 2020 Gateworks Corporation |
4 | */ |
5 | #ifndef __LINUX_MFD_GSC_H_ |
6 | #define __LINUX_MFD_GSC_H_ |
7 | |
8 | #include <linux/regmap.h> |
9 | |
10 | /* Device Addresses */ |
11 | #define GSC_MISC 0x20 |
12 | #define GSC_UPDATE 0x21 |
13 | #define GSC_GPIO 0x23 |
14 | #define GSC_HWMON 0x29 |
15 | #define GSC_EEPROM0 0x50 |
16 | #define GSC_EEPROM1 0x51 |
17 | #define GSC_EEPROM2 0x52 |
18 | #define GSC_EEPROM3 0x53 |
19 | #define GSC_RTC 0x68 |
20 | |
21 | /* Register offsets */ |
22 | enum { |
23 | GSC_CTRL_0 = 0x00, |
24 | GSC_CTRL_1 = 0x01, |
25 | GSC_TIME = 0x02, |
26 | GSC_TIME_ADD = 0x06, |
27 | GSC_IRQ_STATUS = 0x0A, |
28 | GSC_IRQ_ENABLE = 0x0B, |
29 | GSC_FW_CRC = 0x0C, |
30 | GSC_FW_VER = 0x0E, |
31 | GSC_WP = 0x0F, |
32 | }; |
33 | |
34 | /* Bit definitions */ |
35 | #define GSC_CTRL_0_PB_HARD_RESET 0 |
36 | #define GSC_CTRL_0_PB_CLEAR_SECURE_KEY 1 |
37 | #define GSC_CTRL_0_PB_SOFT_POWER_DOWN 2 |
38 | #define GSC_CTRL_0_PB_BOOT_ALTERNATE 3 |
39 | #define GSC_CTRL_0_PERFORM_CRC 4 |
40 | #define GSC_CTRL_0_TAMPER_DETECT 5 |
41 | #define GSC_CTRL_0_SWITCH_HOLD 6 |
42 | |
43 | #define GSC_CTRL_1_SLEEP_ENABLE 0 |
44 | #define GSC_CTRL_1_SLEEP_ACTIVATE 1 |
45 | #define GSC_CTRL_1_SLEEP_ADD 2 |
46 | #define GSC_CTRL_1_SLEEP_NOWAKEPB 3 |
47 | #define GSC_CTRL_1_WDT_TIME 4 |
48 | #define GSC_CTRL_1_WDT_ENABLE 5 |
49 | #define GSC_CTRL_1_SWITCH_BOOT_ENABLE 6 |
50 | #define GSC_CTRL_1_SWITCH_BOOT_CLEAR 7 |
51 | |
52 | #define GSC_IRQ_PB 0 |
53 | #define GSC_IRQ_KEY_ERASED 1 |
54 | #define GSC_IRQ_EEPROM_WP 2 |
55 | #define GSC_IRQ_RESV 3 |
56 | #define GSC_IRQ_GPIO 4 |
57 | #define GSC_IRQ_TAMPER 5 |
58 | #define GSC_IRQ_WDT_TIMEOUT 6 |
59 | #define GSC_IRQ_SWITCH_HOLD 7 |
60 | |
61 | int gsc_read(void *context, unsigned int reg, unsigned int *val); |
62 | int gsc_write(void *context, unsigned int reg, unsigned int val); |
63 | |
64 | struct gsc_dev { |
65 | struct device *dev; |
66 | |
67 | struct i2c_client *i2c; /* 0x20: interrupt controller, WDT */ |
68 | struct i2c_client *i2c_hwmon; /* 0x29: hwmon, fan controller */ |
69 | |
70 | struct regmap *regmap; |
71 | |
72 | unsigned int fwver; |
73 | unsigned short fwcrc; |
74 | }; |
75 | |
76 | #endif /* __LINUX_MFD_GSC_H_ */ |
77 | |