kernel/linux.git/drivers/mtd/chips/map_ram.c, branch v6.12.80

mtd: map_ram: prevent use of point and unpoint when NO_XIP is set

2023-09-22T14:33:34+00:00

When the DT property no-unaligned-direct-access is set, map->phys is set to NO_XIP. With this property set, the flash should not be exposed directly to MTD users, since it cannot be mapped. map_ram() exposes the flash direct access unconditionally which leads to access errors (when the bus width does not match the RAM width). Therefore do not set point and unpoint when NO_XIP is set. Signed-off-by: Shivamurthy Shastri Reviewed-by: Benedikt Spranger Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230919113320.16953-1-shivamurthy.shastri@linutronix.de

mtd: chips: Use SPDX license headers

2023-06-09T15:27:11+00:00

Some of the files in mtd/chips do not have a SPDX license header, presumably because the text string "GPL'd" didn't parse with Thomas rulesets for magic license tagging. Fix this, the code is initially from RedHat which clearly targeted the Linux kernel and intended it to be GPLv2. In any case the original author appears to be David Woodhouse who can then confirm this. Cc: David Woodhouse Cc: Thomas Gleixner Signed-off-by: Linus Walleij Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230603185200.3571174-1-linus.walleij@linaro.org

mtd: Stop updating erase_info->state and calling mtd_erase_callback()

2018-03-21T08:50:56+00:00

MTD users are no longer checking erase_info->state to determine if the erase operation failed or succeeded. Moreover, mtd_erase_callback() is now a NOP. We can safely get rid of all mtd_erase_callback() calls and all erase_info->state assignments. While at it, get rid of the erase_info->state field, all MTD_ERASE_XXX definitions and the mtd_erase_callback() function. Signed-off-by: Boris Brezillon Reviewed-by: Richard Weinberger Reviewed-by: Miquel Raynal Acked-by: Bert Kenward --- Changes in v2: - Address a few coding style issues (reported by Miquel) - Remove comments that are no longer valid (reported by Miquel)

mtd: remove the get_unmapped_area method

2017-11-13T20:39:18+00:00

It is now unused. Signed-off-by: Nicolas Pitre Reviewed-by: Richard Weinberger Acked-by: Boris Brezillon Tested-by: Chris Brandt Signed-off-by: Richard Weinberger

mtd: chips/map_ram.c: implement point and unpoint methods

2017-11-13T20:39:17+00:00

This will allow for the removal of the get_unmapped_area method later. Signed-off-by: Nicolas Pitre Reviewed-by: Richard Weinberger Acked-by: Boris Brezillon Signed-off-by: Richard Weinberger

mtd: map_ram: Enable mtdoops

2015-01-09T23:31:56+00:00

Signed-off-by: Alessio Igor Bogani Signed-off-by: Brian Norris

mtd: remove R/O checking duplication

2012-03-26T23:29:11+00:00

Many drivers check whether the partition is R/O and return -EROFS if yes. Let's stop having duplicated checks and move them to the API functions instead. And again a bit of noise - deleted few too sparse newlines, sorry. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: add leading underscore to all mtd functions

2012-03-26T23:20:01+00:00

This patch renames all MTD functions by adding a "_" prefix: mtd->erase -> mtd->_erase mtd->read_oob -> mtd->_read_oob ... The reason is that we are re-working the MTD API and from now on it is an error to use MTD function pointers directly - we have a corresponding API call for every pointer. By adding a leading "_" we achieve the following: 1. Make sure we convert every direct pointer users 2. A leading "_" suggests that this interface is internal and it becomes less likely that people will use them directly 3. Make sure all the out-of-tree modules stop compiling and the owners spot the big API change and amend them. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: Remove obsolete include

2010-08-08T20:19:42+00:00

Signed-off-by: David Woodhouse

NOMMU: Present backing device capabilities for MTD chardevs

2009-03-24T09:00:19+00:00

Present backing device capabilities for MTD character device files to allow NOMMU mmap to do direct mapping where possible. Signed-off-by: David Howells Tested-by: Bernd Schmidt Signed-off-by: David Woodhouse