4 #include <linux/version.h>
6 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
7 #error This driver is for kernel versions 2.6.16 and later
10 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 21)
11 #if !(defined RHEL_MAJOR && RHEL_MAJOR == 5 && RHEL_MINOR >= 6)
12 /* Simplified version for compatibility */
13 struct i2c_board_info {
14 char type[I2C_NAME_SIZE];
21 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 25)
22 /* Some older kernels have a different, useless struct i2c_device_id */
23 #define i2c_device_id i2c_device_id_compat
24 struct i2c_device_id {
25 char name[I2C_NAME_SIZE];
26 kernel_ulong_t driver_data /* Data private to the driver */
27 __attribute__((aligned(sizeof(kernel_ulong_t))));
31 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
32 static unsigned short empty_i2c[] = { I2C_CLIENT_END };
33 static struct i2c_client_address_data addr_data = {
34 .normal_i2c = normal_i2c,
40 /* Red Hat EL5 includes backports of these functions, so we can't redefine
42 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
43 #if !(defined RHEL_MAJOR && RHEL_MAJOR == 5 && RHEL_MINOR >= 5)
44 static inline int strict_strtoul(const char *cp, unsigned int base,
47 *res = simple_strtoul(cp, NULL, base);
51 static inline int strict_strtol(const char *cp, unsigned int base, long *res)
53 *res = simple_strtol(cp, NULL, base);
59 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 28)
61 * Divide positive or negative dividend by positive divisor and round
62 * to closest integer. Result is undefined for negative divisors and
63 * for negative dividends if the divisor variable type is unsigned.
65 #define DIV_ROUND_CLOSEST(x, divisor)( \
68 typeof(divisor) __d = divisor; \
69 (((typeof(x))-1) > 0 || \
70 ((typeof(divisor))-1) > 0 || (__x) > 0) ? \
71 (((__x) + ((__d) / 2)) / (__d)) : \
72 (((__x) - ((__d) / 2)) / (__d)); \
77 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
79 i2c_smbus_read_word_swapped(const struct i2c_client *client, u8 command)
81 s32 value = i2c_smbus_read_word_data(client, command);
83 return (value < 0) ? value : swab16(value);
87 i2c_smbus_write_word_swapped(const struct i2c_client *client,
88 u8 command, u16 value)
90 return i2c_smbus_write_word_data(client, command, swab16(value));
96 * module_driver() - Helper macro for drivers that don't do anything
97 * special in module init/exit. This eliminates a lot of boilerplate.
98 * Each module may only use this macro once, and calling it replaces
99 * module_init() and module_exit().
101 * @__driver: driver name
102 * @__register: register function for this driver type
103 * @__unregister: unregister function for this driver type
104 * @...: Additional arguments to be passed to __register and __unregister.
106 * Use this macro to construct bus specific macros for registering
107 * drivers, and do not use it on its own.
109 #define module_driver(__driver, __register, __unregister, ...) \
110 static int __init __driver##_init(void) \
112 return __register(&(__driver) , ##__VA_ARGS__); \
114 module_init(__driver##_init); \
115 static void __exit __driver##_exit(void) \
117 __unregister(&(__driver) , ##__VA_ARGS__); \
119 module_exit(__driver##_exit);
122 #ifndef module_i2c_driver
124 * module_i2c_driver() - Helper macro for registering a I2C driver
125 * @__i2c_driver: i2c_driver struct
127 * Helper macro for I2C drivers which do not do anything special in module
128 * init/exit. This eliminates a lot of boilerplate. Each module may only
129 * use this macro once, and calling it replaces module_init() and module_exit()
131 #define module_i2c_driver(__i2c_driver) \
132 module_driver(__i2c_driver, i2c_add_driver, \
137 #define clamp_val SENSORS_LIMIT
141 #define kstrtol strict_strtol
144 #define kstrtoul strict_strtoul
147 #ifndef request_muxed_region
148 #define request_muxed_region(a, b, c) (true)
149 #define release_region(a, b)
152 #endif /* __COMPAT_H */