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mtd: NOR flash driver for OMAP-L137/AM17x

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OMAP-L137/AM17x has limited number of dedicated EMIFA
address pins, enough to interface directly to an SDRAM.
If a device such as an asynchronous flash needs to be
attached to the EMIFA, then either GPIO pins or a chip
select may be used to control the flash device's upper
address lines.

This patch adds support for the NOR flash on the OMAP-L137/
AM17x user interface daughter board using the latch-addr-flash
MTD mapping driver which allows flashes to be partially
physically addressed. The upper address lines are set by
a board specific code which is a separate patch.

Signed-off-by: David Griego <dgriego@mvista.com>
Signed-off-by: Aleksey Makarov <amakarov@ru.mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Savinay Dharmappa <savinay.dharmappa@ti.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Griego 2010-11-30 15:32:05 +05:30 • committed by David Woodhouse
parent a321590246
commit dcfb81d61d
4 changed files with 311 additions and 0 deletions
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29
include/linux/mtd/latch-addr-flash.h Normal file
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/*
* Interface for NOR flash driver whose high address lines are latched
*
* Copyright © 2008 MontaVista Software, Inc. <source@mvista.com>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#ifndef __LATCH_ADDR_FLASH__
#define __LATCH_ADDR_FLASH__
struct map_info;
struct mtd_partition;
struct latch_addr_flash_data {
unsigned int width;
unsigned int size;
int (*init)(void *data, int cs);
void (*done)(void *data);
void (*set_window)(unsigned long offset, void *data);
void *data;
unsigned int nr_parts;
struct mtd_partition *parts;
};
#endif