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 */
22enum {
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
61int gsc_read(void *context, unsigned int reg, unsigned int *val);
62int gsc_write(void *context, unsigned int reg, unsigned int val);
63
64struct 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

source code of linux/include/linux/mfd/gsc.h