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