tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * i2c-core.h - interfaces internal to the I2C framework
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15#include <linux/rwsem.h>
16
17struct i2c_devinfo {
18 struct list_head list;
19 int busnum;
20 struct i2c_board_info board_info;
21};
22
23/* board_lock protects board_list and first_dynamic_bus_num.
24 * only i2c core components are allowed to use these symbols.
25 */
26extern struct rw_semaphore __i2c_board_lock;
27extern struct list_head __i2c_board_list;
28extern int __i2c_first_dynamic_bus_num;
29
30int i2c_check_7bit_addr_validity_strict(unsigned short addr);
31
32#ifdef CONFIG_ACPI
33const struct acpi_device_id *
34i2c_acpi_match_device(const struct acpi_device_id *matches,
35 struct i2c_client *client);
36void i2c_acpi_register_devices(struct i2c_adapter *adap);
37#else /* CONFIG_ACPI */
38static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
39static inline const struct acpi_device_id *
40i2c_acpi_match_device(const struct acpi_device_id *matches,
41 struct i2c_client *client)
42{
43 return NULL;
44}
45#endif /* CONFIG_ACPI */
46extern struct notifier_block i2c_acpi_notifier;
47
48#ifdef CONFIG_ACPI_I2C_OPREGION
49int i2c_acpi_install_space_handler(struct i2c_adapter *adapter);
50void i2c_acpi_remove_space_handler(struct i2c_adapter *adapter);
51#else /* CONFIG_ACPI_I2C_OPREGION */
52static inline int i2c_acpi_install_space_handler(struct i2c_adapter *adapter) { return 0; }
53static inline void i2c_acpi_remove_space_handler(struct i2c_adapter *adapter) { }
54#endif /* CONFIG_ACPI_I2C_OPREGION */
55
56#ifdef CONFIG_OF
57void of_i2c_register_devices(struct i2c_adapter *adap);
58#else
59static inline void of_i2c_register_devices(struct i2c_adapter *adap) { }
60#endif
61extern struct notifier_block i2c_of_notifier;