1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * i2c-smbus.h - SMBus extensions to the I2C protocol 4 * 5 * Copyright (C) 2010-2019 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 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt 19 * handling 20 * 21 * If irq is not specified, the smbus_alert driver doesn't take care of 22 * interrupt handling. In that case it is up to the I2C bus driver to either 23 * handle the interrupts or to poll for alerts. 24 */ 25 struct i2c_smbus_alert_setup { 26 int irq; 27 }; 28 29 struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter, 30 struct i2c_smbus_alert_setup *setup); 31 int i2c_handle_smbus_alert(struct i2c_client *ara); 32 33 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_I2C_SLAVE) 34 struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter); 35 void i2c_free_slave_host_notify_device(struct i2c_client *client); 36 #else i2c_new_slave_host_notify_device(struct i2c_adapter * adapter)37static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter) 38 { 39 return ERR_PTR(-ENOSYS); 40 } i2c_free_slave_host_notify_device(struct i2c_client * client)41static inline void i2c_free_slave_host_notify_device(struct i2c_client *client) 42 { 43 } 44 #endif 45 46 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_DMI) 47 void i2c_register_spd(struct i2c_adapter *adap); 48 #else i2c_register_spd(struct i2c_adapter * adap)49static inline void i2c_register_spd(struct i2c_adapter *adap) { } 50 #endif 51 52 #endif /* _LINUX_I2C_SMBUS_H */ 53