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    Subject[PATCH v3 1/3] memory_accessor: new interface for reading/writing persistent memory
    Date
    This patch adds 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 <dbrownell@users.sourceforge.net>
    Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
    ---
    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 3fdc108..42767d1 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_ */
    --
    1.6.1.3


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