linux-stable.git/drivers/mtd/chips, branch linux-3.19.y

mtd: delete unnecessary checks before two function calls

2014-11-26T06:44:10+00:00

The functions kfree() and pci_dev_put() test whether their argument is NULL
and then return immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Signed-off-by: Brian Norris

mtd: cfi_cmdset_0001.c: fix resume for LH28F640BF chips

2014-10-30T01:50:52+00:00

After '#echo mem > /sys/power/state' some devices can not be properly resumed
because apparently the MTD Partition Configuration Register has been reset
to default thus the rootfs cannot be mounted cleanly on resume.
An example of this can be found in the SA-1100 Developer's Manual at 9.5.3.3
where the second step of the Sleep Shutdown Sequence is described:
"An internal reset is applied to the SA-1100. All units are reset...".

As workaround we refresh the PCR value as done initially on chip setup.

This behavior and the fix are confirmed by our tests done on 2 different Zaurus
collie units with kernel 3.17.

Fixes: 812c5fa82bae: ("mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR")
Signed-off-by: Dmitry Eremin-Solenikov 
Signed-off-by: Andrea Adami 
Cc:  # 3.16+
Signed-off-by: Brian Norris

Merge l2-mtd/next into l2-mtd/master

2014-08-19T18:57:23+00:00

mtd: cfi_cmdset_0002: allow retry/timeout loop to exit

2014-08-19T18:53:07+00:00

The variable 'retries' is never modified, so if the reset operation
never is going to complete, we'll get stuck in an infinite loop.

It looks like the intention was to decrement 'retries' on every loop.
Untested.

Caught by Coverity.

Signed-off-by: Brian Norris

mtd: cfi_cmdset_0002: check return code for get_chip()

2014-08-16T01:09:00+00:00

Coverity CID 1230633

Signed-off-by: Brian Norris 
Tested-by: Christian Riesch

Merge tag 'v3.16-rc6' into MTD development branch

2014-07-21T07:01:16+00:00

Linux 3.16-rc6

mtd: cfi_cmdset_0002: fix do_write_buffer() timeout error

2014-07-16T18:03:38+00:00

For some NOR flashes, the size of the buffer program has been increased
from 256 bytes to 512 bytes, and so 2ms maximum timeout can may not be
sufficient for all different vendor's NOR flash. There is maximum
timeout information in the CFI area, so we instead of picking a fixed
value, we can calculate this according to the standard CFI parameters
parsed at probe time. If we haven't probed this information, or it is
smaller than 2000us, then specify a minimum value 2000us.

Tested with Micron JS28F512M29EWx and Micron MT28EW512ABA flash devices.

Signed-off-by: Bean Huo 
[Brian: fix up comments, use 'max()']
Signed-off-by: Brian Norris

mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR

2014-07-14T05:22:47+00:00

This family of chips was long ago supported by the pre-cfi driver.
CFI code tested on several Zaurus SL-5500 (Collie) 2x16 on 32 bit bus.

Function is_LH28F640BF() mimics is_m29ew() from cmdset_0002.c

Buffer write fixes as seen in 2007 patch c/o
Anti Sullin  artecdesign.ee>
http://comments.gmane.org/gmane.linux.ports.arm.kernel/36733

[Brian: this patch is semi-urgent, because the following patch switches
  to using CFI detection for a chip which (until now) is unsupported by
  the CFI driver

  9218310  ARM: 8084/1: sa1100: collie: revert back to cfi_probe
]

Signed-off-by: Andrea Adami 
Signed-off-by: Brian Norris

mtd: cfi_cmdset_0002: Add support for locking OTP memory

2014-07-12T02:44:25+00:00

This patch adds support for the locking of the one time
programmable (OTP) memory of Micron M29EW devices.

Signed-off-by: Christian Riesch 
Signed-off-by: Brian Norris

mtd: cfi_cmdset_0002: Add support for writing OTP memory

2014-07-12T02:44:25+00:00

This patch adds support for writing the one time programmable (OTP)
memory of Micron M29EW devices.

Signed-off-by: Christian Riesch 
Signed-off-by: Brian Norris