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/*
* Copyright (C) 2013 Gateworks Corporation
* Copyright (C) 2014 Lucas Stach, Pengutronix
* Author: Tim Harvey <tharvey@gateworks.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* 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);
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