| Wolfram Sang | 2b7a505 | 2008-07-14 22:38:35 +0200 | [diff] [blame] | 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 */ |