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mtd: Add MTD concat support to concatenate multiple MTD NOR devices

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This patch adds concatenation support to the U-Boot MTD infrastructure.
By enabling CONFIG_MTD_CONCAT this MTD CFI wrapper will concatenate
all found NOR devices into one single MTD device. This can be used by
e.g by UBI to access a partition that spans over multiple NOR chips.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2009-05-12 14:29:39 +02:00 • committed by Wolfgang Denk
parent 55e0ed6078
commit 0a57265533
5 changed files with 915 additions and 5 deletions
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12
include/linux/mtd/compat.h
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@ -19,11 +19,15 @@
#define kmalloc(size, flags) malloc(size)
#define kzalloc(size, flags) calloc(size, 1)
#define vmalloc(size) malloc(size)
#define kfree(ptr) free(ptr)
#define vfree(ptr) free(ptr)
#define vmalloc(size) malloc(size)
#define kfree(ptr) free(ptr)
#define vfree(ptr) free(ptr)
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
#define DECLARE_WAITQUEUE(...) do { } while (0)
#define add_wait_queue(...) do { } while (0)
#define remove_wait_queue(...) do { } while (0)
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
/*
* ..and if you can't take the strict

21
include/linux/mtd/concat.h Normal file
View file

@ -0,0 +1,21 @@
/*
* MTD device concatenation layer definitions
*
* (C) 2002 Robert Kaiser <rkaiser@sysgo.de>
*
* This code is GPL
*/
#ifndef MTD_CONCAT_H
#define MTD_CONCAT_H
struct mtd_info *mtd_concat_create(
struct mtd_info *subdev[], /* subdevices to concatenate */
int num_devs, /* number of subdevices */
const char *name); /* name for the new device */
void mtd_concat_destroy(struct mtd_info *mtd);
#endif