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authorDavid Brownell <david-b@pacbell.net>2006-01-08 13:34:22 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-13 16:29:54 -0800
commit1d6432fe10c3e724e307dd7137cd293a0edcae80 (patch)
treee32ba2eaecff99b2b86455ed2df8365b082cd396 /include/linux/spi
parentffa458c1bd9b6f653008d450f337602f3d52a646 (diff)
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op-kernel-dev-1d6432fe10c3e724e307dd7137cd293a0edcae80.tar.gz
[PATCH] spi: mtd dataflash driver
This is a conversion of the AT91rm9200 DataFlash MTD driver to use the lightweight SPI framework, and no longer be AT91-specific. It compiles down to less than 3KBytes on ARM. The driver allows board-specific init code to provide platform_data with the relevant MTD partitioning information, and hotplugs. This version has been lightly tested. Its parent at91_dataflash driver has been pretty well banged on, although kernel.org JFFS2 dataflash support was acting broken the last time I tried it. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/flash.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/spi/flash.h b/include/linux/spi/flash.h
new file mode 100644
index 0000000..2ce6558
--- /dev/null
+++ b/include/linux/spi/flash.h
@@ -0,0 +1,27 @@
+#ifndef LINUX_SPI_FLASH_H
+#define LINUX_SPI_FLASH_H
+
+struct mtd_partition;
+
+/**
+ * struct flash_platform_data: board-specific flash data
+ * @name: optional flash device name (eg, as used with mtdparts=)
+ * @parts: optional array of mtd_partitions for static partitioning
+ * @nr_parts: number of mtd_partitions for static partitoning
+ *
+ * Board init code (in arch/.../mach-xxx/board-yyy.c files) can
+ * provide information about SPI flash parts (such as DataFlash) to
+ * help set up the device and its appropriate default partitioning.
+ *
+ * Note that for DataFlash, sizes for pages, blocks, and sectors are
+ * rarely powers of two; and partitions should be sector-aligned.
+ */
+struct flash_platform_data {
+ char *name;
+ struct mtd_partition *parts;
+ unsigned int nr_parts;
+
+ /* we'll likely add more ... use JEDEC IDs, etc */
+};
+
+#endif
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