mtd: nand: gpmc: Add BCH16 support ...

This adds support for BCH16 ECC encoding. The support is mostly taken
from Linux-5.3-rc6. One major change is the different wrap mode used.
The Kernel uses wrapmode 1, which means "pass all data through the BCH
engine". Still the Kernel has to skip the OOB marker which is done by
reading all user data, then use NAND_CMD_RNDOUT to position right
behind the OOB marker and then read the ECC data. Instead of doing this
we use wrap mode 4 which allows us to bypass the OOB marker from the
BCH engine automatically. This explains

bch_wrapmode = 1, eccsize0 = 0, eccsize1 = 52 vs.
bch_wrapmode = 4, eccsize0 = 4, eccsize1 = 52

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

bus: omap-gpmc: make locally used function static ...

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

mtd: nand: omap_gpmc: Remove BCH4 support ...

This has no users and seems to be untested. Removed it.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

bus: omap-gpmc: Add Generic device support ...

This adds support for generic devices like NOR flash and
ethernet to the gpmc bus driver.

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

bus: omap-gpmc: fix wrong bit setting ...

GPMC_CONFIG4_WEEXTRADELAY should be set depending on we_extra_delay,
not on oe_extra_delay. This seems to be copy-pasted from two lines above.

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

sizes.h: move include/sizes.h to include/linux/sizes.h ...

This file originates in Linux.  Linux has it under include/linux/
directory since commit dccd2304cc90.
Let's move it to the same place as well in barebox.

This commit was generated by the following commands:

  find -name '*.[chS]' | xargs sed -i -e 's:<sizes.h>:<linux/sizes.h>:'
  git mv include/sizes.h include/linux/

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

resource: Let dev_get_mem_region return an error pointer ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

mtd: omap gpmc: fix bch8 nand-ecc-opt property ...

We interpret the ECC option "bch8" as OMAP_ECC_BCH8_CODE_HW, but the
Kernel uses OMAP_ECC_BCH8_CODE_HW_ROMCODE in this case instead. To make
the interpretation of the ti,nand-ecc-opt property compatible to the
Kernel we have to use OMAP_ECC_BCH8_CODE_HW_ROMCODE for "bch8"

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

bus: Add omap gpmc driver ...

This adds a devicetree-only driver for to configure the gpmc and its
child devices from dt. Currently only NAND is supported.

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