LXR linux/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 */
  41struct i2c_smbus_alert_setup {
  42        unsigned int            alert_edge_triggered:1;
  43        int                     irq;
  44};
  45
  46struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
  47                                         struct i2c_smbus_alert_setup *setup);
  48int i2c_handle_smbus_alert(struct i2c_client *ara);
  49
  50#endif /* _LINUX_I2C_SMBUS_H */
  51