Move zynq timer out of mach folder to generic location
and enable it.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Remove all xilinx specific names from the driver
because this is generic driver for cadence ttc.
xttc->ttc
ttcps->ttc
...

No functional changes in this driver.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Use clocksource timer initialization.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Use cdns,ttc because this driver is Cadence Rev06
Triple Timer Counter and everybody can use it
without xilinx specific function name or probing.

Also use standard dt description for timer
and also prepare for moving to clocksource
initialization.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

The timers are common to both A9 cores, so let's set the clock
event struct's cpumask accordingly, to all possible CPUs.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Fixing multi line comment style at two locations.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Some #includes are implicitly included through others, some are
just not needed.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Aligning the columns in a block of #defines, so that the values
are starting in the same colum on every line.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: NMichal Simek <michal.simek@xilinx.com>
Acked-by: NJohn Linn <john.linn@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Acknowedging an interrupt requires to read the interrupt register
only. The write was only required to work around a bug in
the QEMU implementation of the TTC, which is fixed.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

The acronym PSS is deprecated by Xilinx. The correct term, which is
also used in Xilinx documentation is PS (processing system).
This is just a search and replace:
 - s/PSS/PS/g
 - s/pss/ps/g
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>

Now that the TTC driver has proper support for DT bindings, it is not
necessary for the registers to be mapped early.  They will be mapped
during clock initialization using of_iomap().  Remove the early mapping.

In addition, remove the extraneous zynq_soc.h include from the timer
driver.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

Add support for retrieving TTC configuration from device tree.  This
includes the ability to pull information about the driving clocks from
the of_clk bindings.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Acked-by: NMichal Simek <michal.simek@xilinx.com>

Move the sys_timer definition out of ttc driver and make it part of the
common zynq code.  This is preparation for renaming and COMMON_CLK
support.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

The 1st board support is minimal to get a system up and running
on the Xilinx platform.

This platform reuses the clock implementation from plat-versatile, and
it depends entirely on CONFIG_OF support.  There is only one board
support file which obtains all device information from a device tree
dtb file which is passed to the kernel at boot time.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>