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 <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 */
  44struct i2c_smbus_alert_setup {
  45        unsigned int            alert_edge_triggered:1;
  46        int                     irq;
  47};
  48
  49struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
  50                                         struct i2c_smbus_alert_setup *setup);
  51int i2c_handle_smbus_alert(struct i2c_client *ara);
  52
  53#endif /* _LINUX_I2C_SMBUS_H */
  54