1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * i2c-smbus.h - SMBus extensions to the I2C protocol 4 * 5 * Copyright (C) 2010 Jean Delvare <jdelvare@suse.de> 6 */ 7 8 #ifndef _LINUX_I2C_SMBUS_H 9 #define _LINUX_I2C_SMBUS_H 10 11 #include <linux/i2c.h> 12 #include <linux/spinlock.h> 13 #include <linux/workqueue.h> 14 15 16 /** 17 * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client 18 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0) 19 * triggered 20 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt 21 * handling 22 * 23 * If irq is not specified, the smbus_alert driver doesn't take care of 24 * interrupt handling. In that case it is up to the I2C bus driver to either 25 * handle the interrupts or to poll for alerts. 26 * 27 * If irq is specified then it it crucial that alert_edge_triggered is 28 * properly set. 29 */ 30 struct i2c_smbus_alert_setup { 31 int irq; 32 }; 33 34 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter, 35 struct i2c_smbus_alert_setup *setup); 36 int i2c_handle_smbus_alert(struct i2c_client *ara); 37 38 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF) 39 int of_i2c_setup_smbus_alert(struct i2c_adapter *adap); 40 #else of_i2c_setup_smbus_alert(struct i2c_adapter * adap)41static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap) 42 { 43 return 0; 44 } 45 #endif 46 47 #endif /* _LINUX_I2C_SMBUS_H */ 48
