include/linux/i2c-smbus.h

   1 /*
   2  * i2c-smbus.h - SMBus extensions to the I2C protocol
   3  *
   4  * Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #ifndef _LINUX_I2C_SMBUS_H
  22 #define _LINUX_I2C_SMBUS_H
  23
  24 #include <linux/i2c.h>
  25
  26
  27 /**
  28  * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
  29  * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
  30  *              triggered
  31  * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
  32  *              handling
  33  *
  34  * If irq is not specified, the smbus_alert driver doesn't take care of
  35  * interrupt handling. In that case it is up to the I2C bus driver to either
  36  * handle the interrupts or to poll for alerts.
  37  *
  38  * If irq is specified then it it crucial that alert_edge_triggered is
  39  * properly set.
  40  */
  41 struct i2c_smbus_alert_setup {
  42         unsigned int            alert_edge_triggered:1;
  43         int                     irq;
  44 };
  45
  46 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
  47                                          struct i2c_smbus_alert_setup *setup);
  48 int i2c_handle_smbus_alert(struct i2c_client *ara);
  49
  50 #endif /* _LINUX_I2C_SMBUS_H */