nand: mrvl: use ERR_CAST() for returning error pointers ...

ERR_CAST exists to return error pointers as error pointers without
casting them explicitly to the correct pointer type.

Also this Fixes:
In function 'alloc_nand_resource':
warning: return makes pointer from integer without a cast

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

mfd: syscon: Don't call request_iomem_region() ...

On platforms that mix dedicated IP block register space with
miscellaneous registers it is necessary to share register window between
syscon and dedicated IP block driver. Calling request_iomem_region()
implies exclusive ownership of the region, which, in the case above
could not happen.

This change also makes this driver's behaviour to that of its Linux
kernel counterpart.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Revert "syscon: Decrease driver registration priority" ...

Fixing the i.MX6 specific issue this way breaks things on CLPS711x
target. Better fix for the problem is to follow this patch.

This reverts commit c203958.

Reported-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Revert "mci: imx-esdhc: Remove excess function" ...

This reverts commit 8a68969.

With this patch it's no longer possible to call detect on the
physical device which is necessary for example to make environment
on MMC work. Unlike the commit message for 8a6896971d claims
mci_detect_card() is not called from mci_register().

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

Merge branch 'for-next/video'

Merge branch 'for-next/ubi'

Merge branch 'for-next/state'

Merge branch 'for-next/mtd'

Merge branch 'for-next/misc'

Merge branch 'for-next/mips'

Merge branch 'for-next/imx'

mtd: nand: imx-bbm: use raw reading when checking for factory BBM ...

This is necessary to prevent the imx_nand_bbm command to bail out
on ECC errors which leaves the device without BBT.

Also simplify buffer management: Use on-stack buffer instead of malloc.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: Refactor state framework ...

The state framework grew organically over the time. Unfortunately the
architecture and abstractions disappeared during this period.

This patch refactors the framework to recreate the abstractions. The
main focus was the backend with its storage. The main use-case was to
offer better NAND support with less erase cycles and interchangeable
data formats (dtb,raw).

The general architecture now has a backend which consists of a data
format and storage. The storage consists of multiple storage buckets
each holding exactly one copy of the state data. A data format describes
a data serialization for the state framework. This can be either dtb or
raw. A storage bucket is a storage location which is used to store any
data. There is a (new) circular type which writes changes behind the
last written data and therefore reduces the number of erases. The other
type is a direct bucket which writes directly to a storage offset for
all non-erase storage.

Furthermore this patch splits up all classes into different files in a
subdirectory.

This is currently all in one patch as I can't see a good way to split
the changes up without having a non-working state framework in between.

The following diagram shows the new architecture roughly:

           .----------.
           |  state   |
           '----------'
                 |
                 |
                 v
  .----------------------------.
  |       state_backend        |
  |----------------------------|
  | + state_load(*state);      |
  | + state_save(*state);      |
  | + state_backend_init(...); |
  |                            |
  |                            |
  '----------------------------'
    |            |                   The format describes
    |            |                   how the state data
    |            '------------->     is serialized
    |   .--------------------------------------------.
    |   |      state_backend_format <INTERFACE>      |
    |   |--------------------------------------------|
    |   | + verify(*format, magic, *buf, len);       |
    |   | + pack(*format, *state, **buf, len);       |
    |   | + unpack(*format, *state, *buf, len);      |
    |   | + get_packed_len(*format, *state);         |
    |   | + free(*format);                           |
    |   '--------------------------------------------'
    |              ^                      ^
    |              *                      *
    |              *                      *
    |   .--------------------. .--------------------.
    |   | backend_format_dtb | | backend_format_raw |
    |   '--------------------' '--------------------'
    |
    |
    |
    v
.----------------------------------------------------------.
|                  state_backend_storage                   |
|----------------------------------------------------------|
| + init(...);                                             |
| + free(*storage);                                        |
| + read(*storage, *format, magic, **buf, *len, len_hint); |
| + write(*storage, *buf, len);                            |
| + restore_consistency(*storage, *buf, len);              |
'----------------------------------------------------------'
                              |
     The backend storage is responsible to manage multiple
     data copies and distribute them onto several buckets.
     Read data is verified against the given format to
     ensure that the read data is correct.
                              |
                              |
                              |
                              |
                              |
                              v
        .------------------------------------------.
        | state_backend_storage_bucket <INTERFACE> |
        |------------------------------------------|
        | + init(*bucket);                         |
        | + write(*bucket, *buf, len);             |
        | + read(*bucket, **buf, len_hint);        |
        | + free(*bucket);                         |
        '------------------------------------------'
                      ^     ^      ^
                     *      *       *
                    *       *        *
 A storage bucket represents*exactly one data copy at one
 data location. A circular b*cket writes any new data to
 the end of the bucket (for *educed erases on NAND). A
 direct bucket directly writ*s at one location.
               *            *             *
              *             *              *
             *              *               *
 .-----------------------.  *  .-------------------------.
 | backend_bucket_direct |  *  | backend_bucket_circular |
 '-----------------------'  *  '-------------------------'
             ^              *               ^
             |              *               |
             |              *               |
             |              *               |
             |  .-----------------------.   |
             '--| backend_bucket_cached |---'
                '-----------------------'
             A backend_bucket_cached is a transparent
             bucket that directly uses another bucket
             as backend device and caches all accesses.

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

clk: fix misleading indenting ...

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

USB: gadget: composite: avoid possible NULL ptr dereference ...

Check if g is valid before trying to dereference it.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: import of_get_cpu_node() from linux-v4.7-rc2 ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: ehci: honour timeout value ...

usb_control_msg() and usb_bulk_msg() have a timeout parameter. Honour
this in the ehci driver instead of using a default timeout.

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

net: smc911x: Add parsing devicetree options ...

This patch adds parsing basic devicetree options for the smc911x driver:
reg-io-width, reg-shift and smsc,force-(in/ex)ternal-phy, which makes
driver usable for most DTS-based boards.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

eeprom: at24: Use xasprintf for small allocation ...

The code for error checking shouldn't be bigger than the allocated
string.

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

net: dm9k: Fix buswidth setting for platform data probe ...

priv->buswidth expects IORESOURCE_MEM_* macros which are not
identical to the integer byte bus width, so calling
dm9000_setup_buswidth() for the platform_data case is wrong.

fixes: d818f02 net: dm9k: add device tree support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported by: 张忠山 <zzs213@126.com>

mtd: nand: simplify nand_block_checkbad ...

if (A) {
		if (!B)
			return C;
		return D;
	}

	return C;

can be simplified to:

	if (A && B)
		return D;

	return C;

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

input: Compile keymap only if necessary ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

video/edid: Move int_sqrt() out ...

Move int_sqrt() out of drivers/video/edid.c so that it is availible to
other parts of Barebox.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

eeprom: at24: fix discarding const qualifier ...

fixes:
at24.c:434:10: warning: assignment discards 'const' qualifier from pointer
target type

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

mtd: UBI: Add support for updating static volumes ...

Added support to update UBI static volumes in barebox.
This is mainly realized with adding the ioctl UBI_IOCVOLUP.

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

mtd: ubi: actually do work in wear leveling code ...

The actual work in the wear leveling code is done in a separate thread.
Since we do not have threading so far we did not do any of the queued
work. Change this by calling the worker function synchronously.

With this barebox now can write a fastmap on a freshly ubiformated
device.

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

mtd: ubi: Fix endless loop when moving PEB ...

When moving a PEB the leb_write_trylock() function is called.
As the function never returns 0 UBI will end up in an endless
loop.

Noticed the issue when fastmap has been enabled and data is beeing copied
several times to a UBI volume. When UBI tries to move the anchor PEB,
the issue comes up.

The leb_write_trylock() is now equal to the leb_write_lock().
But kept it for easier maintaince in future when syncing with
kernel.

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

net: dm9k: Fix buswidth setting for platform data probe ...

priv->buswidth expects IORESOURCE_MEM_* macros which are not
identical to the integer byte bus width, so calling
dm9000_setup_buswidth() for the platform_data case is wrong.

fixes: d818f02 net: dm9k: add device tree support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported by: 张忠山 <zzs213@126.com>

spi: imx: Remove the use of property "fsl, spi-num-chipselects" ...

The "fsl,spi-num-chipselects" property will be marked obsolete soon.
This patch updates the driver to be ready to such changes.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: nand_mxs: Setup timing ...

So far we relied on the default timing values which are rather slow.
This patch adds the timing setup functions from the kernel. Tested
on i.MX6 with a AMD/Spansion S34ML08G2 and a Micron MT29F32G08ABAAAWP.

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