// SPDX-License-Identifier: GPL-2.0-or-later // SPDX-FileCopyrightText: 2013 Gateworks Corporation // SPDX-FileCopyrightText: 2014 Lucas Stach, Pengutronix /* * Author: Tim Harvey <tharvey@gateworks.com> */ /* i2c slave addresses */ #define GSC_SC_ADDR 0x20 #define GSC_RTC_ADDR 0x68 #define GSC_HWMON_ADDR 0x29 #define GSC_EEPROM_ADDR 0x51 /* System Controller registers */ #define GSC_SC_CTRL0 0x00 #define GSC_SC_CTRL1 0x01 #define GSC_SC_CTRL1_WDDIS (1 << 7) #define GSC_SC_STATUS 0x0a #define GSC_SC_FWVER 0x0e /* System Controller Interrupt bits */ #define GSC_SC_IRQ_PB 0 /* Pushbutton switch */ #define GSC_SC_IRQ_SECURE 1 /* Secure Key erase complete */ #define GSC_SC_IRQ_EEPROM_WP 2 /* EEPROM write violation */ #define GSC_SC_IRQ_GPIO 4 /* GPIO change */ #define GSC_SC_IRQ_TAMPER 5 /* Tamper detect */ #define GSC_SC_IRQ_WATCHDOG 6 /* Watchdog trip */ #define GSC_SC_IRQ_PBLONG 7 /* Pushbutton long hold */ /* Hardware Monitor registers */ #define GSC_HWMON_TEMP 0x00 #define GSC_HWMON_VIN 0x02 #define GSC_HWMON_VDD_3P3 0x05 #define GSC_HWMON_VBATT 0x08 #define GSC_HWMON_VDD_5P0 0x0b #define GSC_HWMON_VDD_CORE 0x0e #define GSC_HWMON_VDD_HIGH 0x14 #define GSC_HWMON_VDD_DDR 0x17 #define GSC_HWMON_VDD_SOC 0x11 #define GSC_HWMON_VDD_1P8 0x1d #define GSC_HWMON_VDD_2P5 0x23 #define GSC_HWMON_VDD_1P0 0x20 /* * I2C transactions to the GSC are done via these functions which * perform retries in the case of a busy GSC NAK'ing the transaction */ int gsc_i2c_read(struct i2c_client *client, u32 addr, u8 *buf, u16 count); int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count); char gsc_get_rev(struct i2c_client *client);