From dcfb81d61da1367e52f7f7e3ceff0d0044c3c7ee Mon Sep 17 00:00:00 2001 From: David Griego Date: Tue, 30 Nov 2010 15:32:05 +0530 Subject: mtd: NOR flash driver for OMAP-L137/AM17x 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 Signed-off-by: Aleksey Makarov Signed-off-by: Sergei Shtylyov Signed-off-by: Savinay Dharmappa Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- include/linux/mtd/latch-addr-flash.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 include/linux/mtd/latch-addr-flash.h (limited to 'include/linux/mtd') diff --git a/include/linux/mtd/latch-addr-flash.h b/include/linux/mtd/latch-addr-flash.h new file mode 100644 index 000000000000..e94b8e128074 --- /dev/null +++ b/include/linux/mtd/latch-addr-flash.h @@ -0,0 +1,29 @@ +/* + * Interface for NOR flash driver whose high address lines are latched + * + * Copyright © 2008 MontaVista Software, Inc. + * + * 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 -- cgit v1.2.3