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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_ */ |