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Linux/include/linux/i2c-smbus.h

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  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         unsigned int            alert_edge_triggered:1;
 46         int                     irq;
 47 };
 48 
 49 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
 50                                          struct i2c_smbus_alert_setup *setup);
 51 int i2c_handle_smbus_alert(struct i2c_client *ara);
 52 
 53 #endif /* _LINUX_I2C_SMBUS_H */
 54 

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