ARM: MXS: introduce stmp device support ...

MXS specific devices have some common infrastructure in the kernel
known as STMP devices. We have the same in barebox, but with a
mxs_ prefix instead of a stmp_ prefix. As some STMP devices are
also found on i.MX6 move the common infrastructure out of MXS
specific files and use the stmp_ prefix.

This is done in preparation for i.MX6 NAND support.

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

mtd: nand: update to v3.11-rc1 ...

This updates the NAND stuff to Linux-3.11-rc1. It is synchronized
as best as we can get:

- locks removed
- The splitting in different files we had to better support different
  features has been dropped. Instead this is now done mostly with the
  use of __maybe_unused

Some barebox adjustments are forward ported, like:

- Allow partial page writes
- Optionally allow to erase bad blocks
- check for all_ff before writing a page

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

serial: ns16550: Add devicetree probe support ...

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

serial: ns16550: Add clk support and make platform_data optional ...

The clockrate was the only really needed field from platform data.
Add clk support to retrieve the clockrate and make platform data
optional.

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

serial: ns16550: remove f_caps from platform_data ...

So far no user had the need to set the flags, so just remove them
from platform data.

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

serial: ns16550: introduce private struct ...

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

serial: ns16550: reorder functions to avoid forward declaration ...

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

clk: provide static inline wrappers ...

So that drivers can use clk_* functions without having to ifdef
them away.

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

mtd: introduce mtd_read_oob and mtd_write_oob ...

Directly copied from the Kernel as of 3.11-rc1

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

mtd: introduce ecc strength ...

This introduces the ecc stength fields in the structures and fills
them in, but leaves them unused right now.

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

mtd: rename mtd_read_oob ...

There is the same function name in the Kernel but with different
semantics. Rename to avoid naming conflicts when we update the
mtd support from the kernel.

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

mtd: rename MTD_OOB_* to MTD_OPS_* ...

To sync with the Linux kernel.

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

mtd: nand: write BBM to OOB even with flash-based BBT ...

This is based on Linux:

commit e2414f4
Author: Brian Norris <computersforpeace@gmail.com>
Date:   Mon Feb 6 13:44:00 2012 -0800

Currently, the flash-based BBT implementation writes bad block data only
to its flash-based table and not to the OOB marker area. Then, as new bad
blocks are marked over time, the OOB markers become incomplete and the
flash-based table becomes the only source of current bad block
information. This becomes an obvious problem when, for example:

 * code accessing the flash cannot read the flash-based BBT format
 * BBT is corrupted and the flash must be rescanned for bad
   blocks; we want to remember bad blocks that were marked from Linux

So to keep the bad block markers in sync with the flash-based BBT, this
patch changes the default so that we write bad block markers to the proper
OOB area on each block in addition to flash-based BBT. Comments are
updated, expanded, and/or relocated as necessary.

The new flash-based BBT procedure for marking bad blocks:
 (1) erase the affected block, to allow OOB marker to be written cleanly
 (2) update in-memory BBT
 (3) write bad block marker to OOB area of affected block
 (4) update flash-based BBT
Note that we retain the first error encountered in (3) or (4), finish the
procedures, and dump the error in the end.

This should handle power cuts gracefully enough. (1) and (2) are mostly
harmless (note that (1) will not erase an already-recognized bad block).
The OOB and BBT may be "out of sync" if we experience power loss bewteen
(3) and (4), but we can reasonably expect that on next boot, subsequent
I/O operations will discover that the block should be marked bad again,
thus re-syncing the OOB and BBT.

Note that this is a change from the previous default flash-based BBT
behavior.

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

mtd: nand: omap: do not set write callback if mtd write is disabled ...

Saves a few bytes of binary space.

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

mtd: nand_imx: Add devicetree probe support ...

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

Add configurability via devicetree ...

This adds the possibility to configure the place for the environment
from the devicetree and to partition devices from the devicetree.

Configuration has the general form of devices with a regular compatible
property. This allows to later add additional drivers or drivers with
different behaviour (for example to add support for redundant environment).

The configuration is all in the /chosen/barebox/ hierarchy of the
devicetree. This separates the configuration from the hardware
description. Also it makes it possible to store the configuration
in a completely separate devicetree (or devicetree overlay). For
the same reason all configuration is done using nodepathes rather
than phandles.

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

mci: Add devicetree partition parsing ...

MMC/SD cards normally have a DOS/GPT partition table, but sometimes
barebox uses the unpartitioned area to store its environment. Add
devicetree partition parsing also for SD/MMC cards so that we have
a way to describe the partition in the devicetree.

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

mtd: Add devicetree partition parsing ...

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

of: Add convenience functions to en/disable devicenodes ...

These functions allow to manipulate the "status" property of
devicenodes effectively enabling/disabling devices.

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

of: partition: check for valid node ...

So that users can call the of partition parsers without checking
if they are probed from the devicetree.

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

bus: Add imx-weim support ...

Mostly taken from the kernel with support for other SoCs from
Alexander Shiyan.

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

of: add mtd of helpers ...

Directly taken from the kernel

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

mci: set partnames of eMMC boot partitions ...

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

of: partitions: factor out function to parse a single partition ...

To make it usable for other code.

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

mfd: mc13xxx: Add support for MC34708 ...

This patch moves support for MC34708 PMIC into mc13xxx driver.

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

mfd: mc13xxx: Separate query_revision function for each supported IC ...

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

mfd: mc13xxx: Determine used bus by "bus_type" field ...

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

ARM: mxs: make ssp gates parents of ssp dividers ...

When changing the rates of the ssp clocks we have to poll the
busy bit, but only when they are enabled. The current code can
not check this properly since the gates are registered as children
of the dividers. This has the effect that when the gate is disabled
the busy bit will be set forever resulting in a freezed system.

Fix this by making the gates parents of the dividers which allows
clk_is_enabled to return the correct result.

The Kernel has the same problem, but here the busy polling is
limited to 10ms, so probably noone noticed this.

The datasheet mentions that the ssp dividers shall only be changed
when the clocks are enabled. The kernel and barebox currently ignore
this. I don't know what effect violating this rule has.

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

i2c: Reuse "driver_match" for I2C bus ...

This will allow to use device_ids and make code a bit smaller.

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

spi: Reuse "driver_match" for SPI bus ...

This will allow to use device_ids and make code a bit smaller.

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