1 /* 2 * i2c-smbus.h - SMBus extensions to the I2C protocol 3 * 4 * Copyright (C) 2010 Jean Delvare <jdelvare@suse.de> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 19 * MA 02110-1301 USA. 20 */ 21 22 #ifndef _LINUX_I2C_SMBUS_H 23 #define _LINUX_I2C_SMBUS_H 24 25 #include <linux/i2c.h> 26 #include <linux/spinlock.h> 27 #include <linux/workqueue.h> 28 29 30 /** 31 * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client 32 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0) 33 * triggered 34 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt 35 * handling 36 * 37 * If irq is not specified, the smbus_alert driver doesn't take care of 38 * interrupt handling. In that case it is up to the I2C bus driver to either 39 * handle the interrupts or to poll for alerts. 40 * 41 * If irq is specified then it it crucial that alert_edge_triggered is 42 * properly set. 43 */ 44 struct i2c_smbus_alert_setup { 45 int irq; 46 }; 47 48 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter, 49 struct i2c_smbus_alert_setup *setup); 50 int i2c_handle_smbus_alert(struct i2c_client *ara); 51 52 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF) 53 int of_i2c_setup_smbus_alert(struct i2c_adapter *adap); 54 #else 55 static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap) 56 { 57 return 0; 58 } 59 #endif 60 61 #endif /* _LINUX_I2C_SMBUS_H */ 62