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nand: add nand mtd concat support

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add for nand devices mtd concat support. Generic MTD concat
support is already ported to mainline, and used in the cfi_mtd
driver. This patch adds it similiar for nand devices.

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher 2016-06-07 08:55:41 +02:00 committed by Tom Rini
parent cddfc97d1f
commit 5d29e27eb9
1 changed files with 41 additions and 0 deletions
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41
drivers/mtd/nand/nand.c
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@ -9,6 +9,7 @@
#include <common.h>
#include <nand.h>
#include <errno.h>
#include <linux/mtd/concat.h>
#ifndef CONFIG_SYS_NAND_BASE_LIST
#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
@ -92,6 +93,44 @@ static void nand_init_chip(int i)
}
#endif
#ifdef CONFIG_MTD_CONCAT
static void create_mtd_concat(void)
{
struct mtd_info *nand_info_list[CONFIG_SYS_MAX_NAND_DEVICE];
int nand_devices_found = 0;
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (nand_info[i] != NULL) {
nand_info_list[nand_devices_found] = nand_info[i];
nand_devices_found++;
}
}
if (nand_devices_found > 1) {
struct mtd_info *mtd;
char c_mtd_name[16];
/*
* We detected multiple devices. Concatenate them together.
*/
sprintf(c_mtd_name, "nand%d", nand_devices_found);
mtd = mtd_concat_create(nand_info_list, nand_devices_found,
c_mtd_name);
if (mtd == NULL)
return;
nand_register(nand_devices_found, mtd);
}
return;
}
#else
static void create_mtd_concat(void)
{
}
#endif
void nand_init(void)
{
#ifdef CONFIG_SYS_NAND_SELF_INIT
@ -112,4 +151,6 @@ void nand_init(void)
board_nand_select_device(mtd_to_nand(nand_info[nand_curr_device]),
nand_curr_device);
#endif
create_mtd_concat();
}