LXR linux/include/linux/i2c-smbus.h

   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 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 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
  19 *              triggered
  20 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
  21 *              handling
  22 *
  23 * If irq is not specified, the smbus_alert driver doesn't take care of
  24 * interrupt handling. In that case it is up to the I2C bus driver to either
  25 * handle the interrupts or to poll for alerts.
  26 *
  27 * If irq is specified then it it crucial that alert_edge_triggered is
  28 * properly set.
  29 */
  30struct i2c_smbus_alert_setup {
  31        int                     irq;
  32};
  33
  34struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
  35                                         struct i2c_smbus_alert_setup *setup);
  36int i2c_handle_smbus_alert(struct i2c_client *ara);
  37
  38#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
  39int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
  40#else
  41static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
  42{
  43        return 0;
  44}
  45#endif
  46
  47#endif /* _LINUX_I2C_SMBUS_H */
  48