linux-toradex.git/include/linux/mtd/mtd.h, branch v3.14.3

mtd: Move major number definitions to major.h

2013-11-07T07:32:59+00:00

This patch moves the char and block major number definitions
to major.h to be with the rest of the major numbers.
While doing this, include major.h in the files that need it.

Signed-off-by: Ezequiel Garcia 
Signed-off-by: Brian Norris

mtd: nand: add a helper to detect the nand type

2013-10-27T23:27:06+00:00

This helper detects that whether the mtd's type is nand type.

Now, it's clear that the MTD_NANDFLASH stands for SLC nand only.
So use the mtd_type_is_nand() to replace the old check method
to do the nand type (include the SLC and MLC) check.

Signed-off-by: Huang Shijie 
Signed-off-by: Brian Norris

mtd: add a new ecc_step_size field to mtd_info{}

2013-08-30T20:37:01+00:00

In order to implement the NAND boot for some Freescale's chips, such as
imx23/imx28/imx50/imx6, we use a tool (called kobs-ng) to burn the uboot
and some metadata to nand chip. And the ROM code will use the metadata to
configrate the BCH, and to find the uboot.

The ECC information(ecc step size, ecc strength) which is used to configrure
the BCH is part of the metadata. The kobs-ng can get the ecc strength from
the sys node /sys/*/ecc_strength now. But it can not get the ecc step size.

This patch adds a new field to store the ecc step size in mtd_info{}, and
it makes preparation for the next patches.

Signed-off-by: Huang Shijie 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: Brian Norris 
Signed-off-by: David Woodhouse

mtd: add 'const' qualifier to a couple of register functions

2013-04-05T12:02:16+00:00

'mtd_device_parse_register()' and 'parse_mtd_partitions()' functions accept a
an array of character pointers. These functions modify neither the pointers nor
the characters they point to. The characters are actually names of the MTD
parsers.

At the moment, the argument type is 'const char **', which means that only the
names of the parsers are constant. Let's turn the argument type into 'const
char * const *', which means that both names and the pointers which point to
them are constant.

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: nand: Increase the ecc placement locations to 640

2012-11-15T13:37:48+00:00

Few devices like H27UBG8T2CTR have a writesize/oobsize of 8KB/640B.
This means that the maximum oobsize has gone up to 640 bytes and consequently
the maximum ecc placement locations have also gone up to 640.

Signed-off-by: Vipin Kumar 
Signed-off-by: Artem Bityutskiy

mtd: move mtd_read_oob() definition out of mtd.h

2012-07-06T17:16:24+00:00

mtd_read_oob() will be expanded a little, so don't leave it in the header
as a static inline function.

Signed-off-by: Brian Norris 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: bitflip_threshold added to mtd_info and sysfs

2012-05-14T04:11:39+00:00

An element 'bitflip_threshold' is added to struct mtd_info, and also exposed as
a read/write variable in sysfs.  This will be used to determine whether or not
mtd_read() returns -EUCLEAN or 0 (absent a hard error).  If the driver leaves it
as zero, mtd will set it to a default value of ecc_strength.

This v2 adds the line that propagates bitflip_threshold from the master to the
partitions - thanks Ivan¹.

¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040900.html

Signed-off-by: Mike Dunn 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: ecc_strength is at ecc step granularity

2012-05-14T04:09:58+00:00

ecc_strength element of mtd_info will be the strength of one ecc step, not of
the entire writesize, as was previously planned.  This is the appropriate way
because, as was pointed out¹, bit errors in excess of the strength of one
step can cause a hard error if they all occur within the same ecc region.

¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040313.html

Signed-off-by: Mike Dunn 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: add ecc_strength fields to mtd structs

2012-03-26T23:56:36+00:00

This adds 'ecc_strength' to struct mtd_info.  This stores the maximum number of
bit errors that can be corrected in one writesize region.

For consistency with the nand code, 'strength' is similiarly added to struct
nand_ecc_ctrl.  This stores the maximum number of bit errors that can be
corrected in one ecc step.

Signed-off-by: Mike Dunn 
Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse

mtd: check for zero length in OTP functions

2012-03-26T23:32:29+00:00

This patch changes all the OTP functions like 'mtd_get_fact_prot_info()' and
makes them return zero immediately if the input 'len' parameter is 0. This is
not really needed currently, but most of the other functions do this, and it is
just consistent to do the same in the OTP functions.

This patch also moves the OTP functions from the header file to mtdcore.c
because they become a bit too big for being inlined.

Signed-off-by: Artem Bityutskiy 
Signed-off-by: David Woodhouse