2 * Copyright (C) 2013 Gateworks Corporation
4 * Author: Tim Harvey <tharvey@gateworks.com>
6 * SPDX-License-Identifier: GPL-2.0+
11 /* i2c slave addresses */
12 #define GSC_SC_ADDR 0x20
13 #define GSC_RTC_ADDR 0x68
14 #define GSC_HWMON_ADDR 0x29
15 #define GSC_EEPROM_ADDR 0x51
17 /* System Controller registers */
25 /* System Controller Control1 bits */
27 GSC_SC_CTRL1_WDDIS = 7, /* 1 = disable watchdog */
30 /* System Controller Interrupt bits */
32 GSC_SC_IRQ_PB = 0, /* Pushbutton switch */
33 GSC_SC_IRQ_SECURE = 1, /* Secure Key erase operation complete */
34 GSC_SC_IRQ_EEPROM_WP = 2, /* EEPROM write violation */
35 GSC_SC_IRQ_GPIO = 4, /* GPIO change */
36 GSC_SC_IRQ_TAMPER = 5, /* Tamper detect */
37 GSC_SC_IRQ_WATCHDOG = 6, /* Watchdog trip */
38 GSC_SC_IRQ_PBLONG = 7, /* Pushbutton long hold */
41 /* Hardware Monitor registers */
43 GSC_HWMON_TEMP = 0x00,
45 GSC_HWMON_VDD_3P3 = 0x05,
46 GSC_HWMON_VBATT = 0x08,
47 GSC_HWMON_VDD_5P0 = 0x0b,
48 GSC_HWMON_VDD_CORE = 0x0e,
49 GSC_HWMON_VDD_HIGH = 0x14,
50 GSC_HWMON_VDD_DDR = 0x17,
51 GSC_HWMON_VDD_SOC = 0x11,
52 GSC_HWMON_VDD_1P8 = 0x1d,
53 GSC_HWMON_VDD_2P5 = 0x23,
54 GSC_HWMON_VDD_1P0 = 0x20,
58 * I2C transactions to the GSC are done via these functions which
59 * perform retries in the case of a busy GSC NAK'ing the transaction
61 int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len);
62 int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len);