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2b7a5056 WS |
1 | #ifndef _LINUX_AT24_H |
2 | #define _LINUX_AT24_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | /* | |
7 | * As seen through Linux I2C, differences between the most common types of I2C | |
8 | * memory include: | |
9 | * - How much memory is available (usually specified in bit)? | |
10 | * - What write page size does it support? | |
11 | * - Special flags (16 bit addresses, read_only, world readable...)? | |
12 | * | |
13 | * If you set up a custom eeprom type, please double-check the parameters. | |
14 | * Especially page_size needs extra care, as you risk data loss if your value | |
15 | * is bigger than what the chip actually supports! | |
16 | */ | |
17 | ||
18 | struct at24_platform_data { | |
19 | u32 byte_len; /* size (sum of all addr) */ | |
20 | u16 page_size; /* for writes */ | |
21 | u8 flags; | |
22 | #define AT24_FLAG_ADDR16 0x80 /* address pointer is 16 bit */ | |
23 | #define AT24_FLAG_READONLY 0x40 /* sysfs-entry will be read-only */ | |
24 | #define AT24_FLAG_IRUGO 0x20 /* sysfs-entry will be world-readable */ | |
25 | #define AT24_FLAG_TAKE8ADDR 0x10 /* take always 8 addresses (24c00) */ | |
26 | }; | |
27 | ||
28 | #endif /* _LINUX_AT24_H */ |