nvmem: rave-sp-eeprom: Add support for "zii,eeprom-name" ...

Upstream kernel driver allows specifying EEPROM name via
"zii,eeprom-name" property. Add code to support that in Barebox as
well.

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

nvmem: rave-sp-eeprom: Remove VLA usage ...

This is a backport of patch [1] by Kees Cook

[1] https://lkml.kernel.org/r/20180620182600.GA24297@beast

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

ARM: dts: rdu1: Add node for backlight device ...

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

ARM: dts: rdu1: Specify "boot-source" NVMEM cell ...

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

ARM: dts: rdu1: Add nodes for RAVE SP EEPROM ...

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

ARM: i.MX: Add support for ZII RDU1 board ...

ZII RDU1 is a i.MX51 based, Babbagde board derivative supported by
upstream kernel. This commit add support for it to Barebox.

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

ARM: babbage: Make PMIC initialization shareable ...

Some board designs copy i.MX51 Babbadge board's PMIC design and so
require exactly the same initialization. Move correspoding code into a
separate file so it can be shared.

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

common: clock: Sample time before poller_call() ...

Change is_timeout() to sample current time before invoking poller
infrascructure to avoid occasional false timeout conditions.

Consider the following timeout loop (can be found in wait_on_timeout):

        while (!(condition)) {
	        if (is_timeout(...)) {
	       	        return -ETIMEDOUT;
                }
        }
	...

in the original logic of is_timeout() it was possible to end up in the
following situation:

        1. Immediate check of of "condition" yeilds false (not enough
           time for it to become true has passed yet)

	2. is_timeout is called which, in turn, calls poller_call()

	3. All registerd pollers take more than specified timeout time
	   to execute.

	4. Sometime during poller_call() "contition" becomes true

	5. As a result of #3 is_timeout() returns "true"

	6. Code bails out with -ETIMEDOUT early even though timeout
	   condition didn't really occur.

One concrete example of this problem was discovered on ZII RDU1
board (poller_call() is long due to a serdev) when doing large data
transfers over SPI to attached DataFlash chip.

This commit changes is_timeout() to sample the value of time before
calling poller_call(). This way first call to is_timeout() will almost
always return false thus checking the condition at least twice before
declaring a timeout.

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

mtd: mtd_dataflash: Don't print bogus command values for READs ...

Call to dev_dbg in dataflash_read() is located to early, before
command[] is initialize to correct values, so it end up printing
values from previous invocation. Move it such that it prints current
call's values.

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

ARM: i.MX: bbu: support partitions starting at i.MX header ...

The i.MX header is at an offset in the boot device, usually 0x400 bytes.
This patch adds a flag to support the case that the partition the image
is written to starts at that offset rather than 0x0.

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

ARM: i.MX: bbu: reimplement IMX_INTERNAL_FLAG_KEEP_DOSPART flag ...

This patch reimplements the IMX_INTERNAL_FLAG_KEEP_DOSPART flag
and makes it more generic. Until now we only kept a dos partition
table over the update. Beginning with i.MX8 we may also want to
preserve a GPT, so we have to extend the preserved area.

It might also be the case that not (only) a partition table is
stored in the initial area of a device, but also other unrelated
data, so it's better to just keep the initial area that is unused
by the i.MX ROM. It's also good to export the flag to allow boards
to specify the initial area shall be preserved.

When a board wants to set the flag for a mtd like device then it
has to check for suitable erase sizes beforehand. We do not check
this (yet).

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

ARM: i.MX: bbu: remove handler specific flags variable ...

Now that we can store flags in the generic handler flags
we no longer need our own variable.

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

bbu: reserve upper 16 bits for handler specific flags ...

Let the handler store 16 bit of handler specific flags in
the generic handler struct. The setup functions of some
bbu handlers let the user specify a flags field. With this
change they can now pass generic and handler specific flags
in a single variable without having to use a second parameter.

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

net: designware: make sure DMA is disabled on kernel start. ...

Halt is not automatically executed if we start the kernel.
So, we may have potentially memory corruptions.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arm: arria10: enable errata 794072 and 845369 ...

Enable workarounds for two of the errata the CPU is affected
with.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: don't include generated header files into MIPS asm files ...

This patch came out of discussions in the 'MIPS parallel build breakage' e-mail thread:

    http://lists.infradead.org/pipermail/barebox/2018-March/032251.html

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

ARM: imx6qp: fix NoC QoS passthrough for new cpu type functions. ...

On i.MX6QP/DP cpu_mx6_is_mx6q/d do not return true anymore.
Use the new cpu_mx6_is_mx6qp/dp to reenable NoC regulator bypass.

Fixes: d4c05d29d484 ("ARM: i.MX6: Add cpu type for 'plus' variants")
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: Use generic GCC library routines from lib/ ...

This is a port of Linux kernel commit

| commit 740129b
| Author: Antony Pavlov <antonynpavlov@gmail.com>
| Date:   Wed Apr 11 08:50:19 2018 +0100
|
|     MIPS: Use generic GCC library routines from lib/

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

lib: Add shared copies of some GCC library routines ...

This commit is based on these linux kernel commits:

| commit b35cd98
| Author: Palmer Dabbelt <palmer@dabbelt.com>
| Date:   Tue May 23 10:28:26 2017 -0700
|
|     lib: Add shared copies of some GCC library routines
|
| commit e3d5980
| Author: Matt Redfearn <matt.redfearn@mips.com>
| Date:   Wed Apr 11 08:50:17 2018 +0100
|
|     lib: Rename compiler intrinsic selects to GENERIC_LIB_*

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

ARM: rdu2: Fetch MAC address info from RAVE SP EEPROM ...

RDU2 stores MAC addresses for its Ethernet interfaces in main RAVE SP
EEPROM. Add code to properly integrate it.

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

nvmem: Introduce nvmem_cell_get_and_read() ...

Introduce nvmem_cell_get_and_read() that combines getting a NVMEM cell
by name and reading its contents.

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

ARM: i.MX53: Make clock tree setup better readable ...

Change write register accesses to read-modify-write accesses. This
makes it clearer which bits are actually changed by the code.

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

ARM: dts: rdu2: Add node for backlight device ...

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

ARM: dts: rdu2: Specify "boot-source" NVMEM cell ...

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

watchdog: rave-sp-wdt: Explicitly access EEPROM for bootsource ...

RAVE SP firmware versions found on RDU2 provide decicated bootsource
manipulation commands, which, under the hood, are just thin wrappers
around write/read to a particular location in EEPROM.

Unfortunately, RAVE SP firmware found on RDU1, does not provide any
dedicated bootsource commands and its users are expected to access
EEPROM directly.

In order to avoid having separate code paths for handling those two
cases, convert the code to access EEPROM directly via NVMEM API.

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

watchdog: rave-sp-wdt: Remove bogus leftover code ...

This code should've been removed when the driver was rebased against
latest watchdog plumbing in Barebox.

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

ARM: dts: rdu2: Add nodes for RAVE SP EEPROM ...

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

ARM: dts: rdu2: Remove obsolete 'pic' node in uart4 ...

All of the code in this commit is:

 a) Obsolete and intended to work with a driver that has never been
    submitted upstream anywhere and is no longer used

 b) Superceeded by the DT code in Linux DT tree

Remove it all and rely on Linux DTS files to properly specify RAVE SP
MFD with a watchdog child node.

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

usb: imx: implement support for limiting host to full speed ...

This is needed when host is known to not work properly in high speed
mode.

In linux, chipidea driver supports 'maximum-speed' device tree property.
When that is set to "full-speed", driver sets PFSC bit in PORTSC
register, which disallows use of high speed mode.

This patch implements same support for barebox.

Important technical detail is that PFSC bit is cleared by port reset,
thus setting it has to be done in ehci->init() callback which is called
after ehci_reset().

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: of: Make use of devpath_to_name() ...

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