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) 2010-2019 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 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
  19 *              handling
  20 *
  21 * If irq is not specified, the smbus_alert driver doesn't take care of
  22 * interrupt handling. In that case it is up to the I2C bus driver to either
  23 * handle the interrupts or to poll for alerts.
  24 */
  25struct i2c_smbus_alert_setup {
  26        int                     irq;
  27};
  28
  29struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter,
  30                                              struct i2c_smbus_alert_setup *setup);
  31int i2c_handle_smbus_alert(struct i2c_client *ara);
  32
  33#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
  34int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
  35#else
  36static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
  37{
  38        return 0;
  39}
  40#endif
  41#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_I2C_SLAVE)
  42struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter);
  43void i2c_free_slave_host_notify_device(struct i2c_client *client);
  44#else
  45static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter)
  46{
  47        return ERR_PTR(-ENOSYS);
  48}
  49static inline void i2c_free_slave_host_notify_device(struct i2c_client *client)
  50{
  51}
  52#endif
  53
  54#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_DMI)
  55void i2c_register_spd(struct i2c_adapter *adap);
  56#else
  57static inline void i2c_register_spd(struct i2c_adapter *adap) { }
  58#endif
  59
  60#endif /* _LINUX_I2C_SMBUS_H */
  61