Merge branch 'for-next/mtd'

drivers/nor/m25p80: add MTD support ...

This has been tested by using UBI with a N25Q128 connected to
a TI McSPI controller.

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

SPI: Put SPI devices on their own bus ...

This patch adds a SPI bus on which the SPI devices and drivers register.
This makes it cleaner as SPI devices won't accidently end up probed by
a platform_device driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

drivers/nor/m25p80: add JEDEC ID for Micron/Numonyx SPI NOR flash ...

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

m25p80: wait for flash before returning after erase ...

else when we do "erase /dev/m25p0.rootfs; reset", the board
will never reboot as the flash is busy to finish the erase
command.

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: implement fast read ...

The fast read command is needed for spi speeds > 25MHz, so use it for
higher speeds.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: optimize erase ...

The driver currently erases blocks in 4kb chunks if 4kb support is
available. This patch uses bigger blocks for suitable areas to speed
up erasing areas.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: align start and end to erase blocks ...

The erase command normally makes sure that the selected area is erased,
therefore align the parameters to eraseblock boundaries.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: refactor chip erase ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: remove unused variables ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor m25p80: remove progression bar ...

Drivers should not print a progression bar.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

use loff_t for file offsets ...

This is a first step for 64bit file support: Make the file sizes/offsets
64bit.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

m25p80: progressbar tweak ...

Show progressbar even when erasing just a single sector,
otherwise it looks as if erase didn't do anything.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

m25p80: allow erase to be interrupted ...

Check for Ctrl-C before erasing each sector.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

m25p80: prevent endless loop in erase ...

"erase /dev/myflash0 0+1" erased the whole flash,
similar for other value of count if you guessed the
erae block size wrong.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

m25p80: set the correct erasesize when we use OPCODE_BE_4K ...

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

nor: Add SPI flash driver ...

This patch adds the m25p80 driver. It has been ported from
Linux. MTD code has been removed. It has been tested with
a m25p40 chip and the Altera SPI master driver.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>