memory_accessor: new interface for reading/writing persistent memory

[linux-2.6-omap-h63xx.git] / include / linux / memory.h

diff --git a/include/linux/memory.h b/include/linux/memory.h
index 3fdc10806d31b9f55470dc3fc3949653ceb1498d..42767d1a62e784e9ce25dfbc9cc37ab9232f226a 100644 (file)
--- 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_ */