diff options
| author | Kevin Hilman <[email protected]> | 2009-04-02 16:56:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2009-04-02 19:04:50 -0700 |
| commit | 06c421ee0d5af95c8c6749ca0ba620cd5010707f (patch) | |
| tree | e4b2cd412d7dd3081f8aaee88d77b1ab72b33b15 /include/linux | |
| parent | bf6aede712334d7338d5c47a5ee5ba3883c82a61 (diff) | |
memory_accessor: new interface for reading/writing persistent memory
Add an interface by which other kernel code can read/write persistent
memory such as I2C or SPI EEPROMs, or devices which provide NVRAM. Use
cases include storage of board-specific configuration data like Ethernet
addresses and sensor calibrations.
Original idea, review and improvement suggestions by David Brownell.
Acked-by: David Brownell <[email protected]>
Signed-off-by: Kevin Hilman <[email protected]>
Cc: Jean Delvare <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memory.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/memory.h b/include/linux/memory.h index 3fdc10806d31..42767d1a62e7 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -99,4 +99,15 @@ enum mem_add_context { BOOT, HOTPLUG }; #define hotplug_memory_notifier(fn, pri) do { } while (0) #endif +/* + * 'struct memory_accessor' is a generic interface to provide + * in-kernel access to persistent memory such as i2c or SPI EEPROMs + */ +struct memory_accessor { + ssize_t (*read)(struct memory_accessor *, char *buf, off_t offset, + size_t count); + ssize_t (*write)(struct memory_accessor *, const char *buf, + off_t offset, size_t count); +}; + #endif /* _LINUX_MEMORY_H_ */ |