LXR linux/include/linux/mfd/gsc.h

   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