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MTD: NAND: JZ4740: Multi-bank support with autodetection

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The platform data can now specify which external memory banks to probe
for NAND chips, and in which order. Banks that contain a NAND are used
and the other banks are freed.

Squashed version of development done in jz-2.6.38 branch.
Original patch by Lars-Peter Clausen with some bug fixes from me.
Thanks to Paul Cercueil for the initial autodetection patch.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3560/
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maarten ter Huurne
2012-03-29 19:17:01 +02:00
committed by Ralf Baechle
parent 28a33cbc24
commit 1471d41a5b
3 changed files with 214 additions and 36 deletions
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4
arch/mips/include/asm/mach-jz4740/jz4740_nand.h
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@@ -19,6 +19,8 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#define JZ_NAND_NUM_BANKS 4
struct jz_nand_platform_data {
int num_partitions;
struct mtd_partition *partitions;
@@ -27,6 +29,8 @@ struct jz_nand_platform_data {
unsigned int busy_gpio;
unsigned char banks[JZ_NAND_NUM_BANKS];
void (*ident_callback)(struct platform_device *, struct nand_chip *,
struct mtd_partition **, int *num_partitions);
};