this is a software part of new (additional) diagnostics for WR PTP Core.
It allows to access diagnostics values through WB registers (e.g. PCI
bus). This is useful for integration of WR with CERN cotrols infrastructure,
such as FESA. It allows the host machine (of SPEC/SVEC/etc) to easily
access information about the health of WR PTP Core.

we had "warning unused.variable", so let's use it
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

While we also have atoi, our custom fromdec/fromhex are more similar
to strtol, and thus useful to parse "number.number" or such stuff.

And since I need to pass negative hex numbers in later commits, here
it is.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

It's not very cleaned-up, but may be useful for other developers.

    * tools/build-random/manybuilds

It builds with randomconfig. It remove ppsi configuration so
the wrpc-sw makefile uses a proper one, even if PPSI_FORCE_CONFIG
is false.

It leave around some files: configs and build logs for warning/error
builds, and only the config for good ones. You'll find them
by "git status".

It also avoids re-building and already known good configuration.

    * tools/build-random/unique-error

This filters error builds to only report one per type.

    * tools/build-random/unique-warning

Same for warning-only failures
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

I spits a number of warnings, and we are not simulating snmp anyways.
Better avoiding the warning than fixing

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Otherwise we get this:

  ppsi/arch-unix/unix-startup.c:35: multiple definition of `main'
  wrc_main_sim.c:193: first defined here

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

If we select a host build, we'll have the same assert from
ppsi::arch-unix, becauseI added a non-libc assert to ppsi while adding
it to wrpc-sw.  But ppsi doesn't build its own asser for arch-wrpc, so
the only proble is with host builds.

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This simplifies, in a way.  Otherwise, we'd need to make most
developer options depend on WR_NODE too.

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Otherwise we have build errors.

   wrc_main.c:172: undefined reference to `uart_init_hw'
   wrc_main.c:172: undefined reference to `uart_read_byte'
   ppsi/arch-wrpc/wrc_ptp_ppsi.c:103: undefined reference to `uart_init_hw'

If we want to make it optional, we can revert this commit
(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This also include a ppsi commit. We must have both at the same time,
because each uses a feature of the other, to link sw-uart at build time.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

We'd miss some symbols in wrs, besides missing the shell

   shell/cmd_diag.c:32:30: error: 'DIAG_RO_BANK' undeclared

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

We can't run such stuff in the switch:

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Otherwise, if we have syslog we fail building:

  lib/syslog.c:197:23: error: 'CONFIG_TEMP_HIGH_THRESHOLD' undeclared

(thanks randconfig)
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Keep assert enabled only for devel_build_test_defconfig
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

We have experienced the problem when re-loading LM32 firmware many times when
WRPC synchronizes to WRS v4.2 (the latest WRS firmware is v5.0). Sometimes after
reprogramming LM32 WRS was reporting a bitslide value the same as for the
previously established link. This was resulting in wrong synchronization and
1-PPS skew off by the difference between the actual and reported WRS bitslide.
This problem is not new with this WRPC v4.0, we've managed to reproduce is also
with WRPC v3.0 and WRS v4.2. Testing WRPC v4.0 with WRS v5.0 did not reveal this
problem.

With this workaround we wait longer before re-enabling the link so that WRS v4.2
for sure notices link down and re-measures the bitslide.