Now that all of the named string association with clocks has been
migrated to clkdev lookups there's no meaningful named topology that can
be constructed for a debugfs tree view. Get rid of the left over bits,
and shrink struct clk a bit in the process.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This provides a clk_rate_mult_range_round() helper for use by some of the
CPG PLL ranged multipliers, following the same approach as used by the
div ranges.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Trivial cleanup.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This V2 patch changes the clock disabling behavior during boot.
Two different changes are made:

1) Delay disabling of clocks until late in the boot process.
   This fixes an existing issue where in-use clocks without
   software reference are disabled by mistake during boot.
   One example of this is the handling of the Mackerel serial
   console output that shares clock with the I2C controller.

2) Write out the "disabled" state to the hardware for clocks
   that not have been used by the kernel. In other words,
   make sure so far unused clocks actually get turned off.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Acked-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Extend the SH / SH-Mobile ARM clock framework to only
resume clocks that have been enabled.

Without this fix divide-by-zero is triggering on sh7372
FSIDIV during system wide resume of Suspend-to-RAM.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Reviewed-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Convert the SuperH clocks framework and shared interrupt handling
code to using struct syscore_ops instead of a sysdev classes and
sysdevs for power managment.

This reduces the code size significantly and simplifies it.  The
optimizations causing things not to be restored after creating a
hibernation image are removed, but they might lead to undesirable
effects during resume from hibernation (e.g. the clocks would be left
as the boot kernel set them, which might be not the same way as the
hibernated kernel had seen them before the hibernation).

This also is necessary for removing sysdevs from the kernel entirely
in the future.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Remove kobject.h from files which don't need it, notably,
sched.h and fs.h.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The disabling of the init op for non-legacy clocks neglected to do the
same in the core clock framework, resulting in a build failure. Fix it
up.
Reported-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now that clk_set_rate_ex() is gone, there is also no way to get at rate
setting algo id, which is now also completely unused. Kill it off before
new clock ops start using it.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

With the refactoring of the SH7722 clock framework some time ago this
abstraction has become unecessary. Kill it off before anyone else gets
the bright idea to start using it.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

  CC      drivers/sh/clk/core.o
drivers/sh/clk/core.c: In function 'clk_round_parent':
drivers/sh/clk/core.c:574: warning: format '%lu' expects type 'long unsigned int', but argument 2 has type 'unsigned int'
drivers/sh/clk/core.c:594: warning: format '%lu' expects type 'long unsigned int', but argument 2 has type 'unsigned int'
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The clk_round_parent() change introduced various checkpatch warnings,
tidy them up.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Sometimes it is possible and reasonable to adjust the parent clock rate to
improve precision of the child clock, e.g., if the child clock has no siblings.
clk_round_parent() is a new addition to the SH clock-framework API, that
implements such an optimization for child clocks with divisors, taking all
integer values in a range.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

According to the linux/clk.h definition we should be handing back an
errno value or a valid rate. This fixes up the case where 0 can be
returned for invalid frequencies or cases where rounding has no
selectable candidate.
Reported-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This shuffles the clock framework code around to a drivers/sh/clk subdir,
to follow the intc split up. This will make it easier to subsequently
break things out as well as plug in different helpers for non-CPG users.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The end condition of for_each_frequency should care about
both clk_rate_table_round and clk_rate_div_range_round,
and using "correct max size" is a natural idea in later function.
To avoid data over flow, this patch didn't modify
clk_rate_div_range_round side as .max = div_max + 1.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

When updating the iterator macro an old argument assignment was used on
the initial assignment causing a fault on the table rounding. Fix it up.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds a new clk_rate_div_range_round() for implementing rate rounding
by divisor ranges. This can be used trivially by clocks that support
arbitrary ranged divisors without the need for rate table construction.

This should only be used by clocks that both have large divisor ranges in
addition to clocks that will never be arbitrarily scaled, as the lack of
a backing frequency table will prevent cpufreq from being able to do much
of anything with them.

Primarily intended for use as a ->recalc helper.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Presently the only assisted rate rounding is frequency table backed, but
there are cases where it's impractical to use a frequency table for
certain clocks (such as the FSIDIV case, which supports 65535 divisors),
and we wish to reuse the same rate rounding algorithm.

This breaks out the core of the rate rounding logic in to its own helper
routine and shuffles the frequency table logic around, switching to using
an iterator for the generic helper routine.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This implements support for ioremapping of register windows that
encapsulate clock control registers used by a struct clk, with
transparent sibling inheritance.

Root clocks at the top of a given topology often encapsulate the entire
register space of all of their sibling clocks, so this mapping can be
done once and handed down. A given clock enable/disable case maps out to
a single bit in a shared register, so this prevents creating multiple
overlapping mappings.

The mapping case breaks down in to a couple of different situations:

	- Sibling clocks without a specific mapping.
	- Root clocks without a specific mapping.
	- Any of sibling/root clocks with a specific mapping.

Sibling clocks with no specified mapping will grovel up the clock chain
and install the root clock mapping unconditionally at registration time.

Root clocks without their own mappings have a dummy BSS-initialized
mapping inserted that is handed down the chain just like any other
mapping. This permits all of the sibling clock ops to read/write using
the mapping offsets without any special configuration, enabling them to
not care whether access ultimately goes through translatable or
untranslatable memory.

Any clock with its own mapping will have the window initialized at
registration time and be ready for use by its clock ops. Failure to
establish the mapping will prevent registration, so no additional sanity
checks are needed. Sibling clocks that double as parents for the moment
will not propagate their mapping down, but this is easily tunable if the
need arises.

All clock mappings are kref refcounted, with each instance of mapping
inheritance incrementing the refcount.
Tested-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Remove "name" and "id" from drivers/sh/ struct clk.

The struct clk members "name" and "id" are not used
now when matching is done through clkdev.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This was killed off by a simplification patch previously that failed to
take the cpufreq use case in to account, so reinstate the old bounding
logic. The lowest rate bounding on the other hand was broken in that it
never actually got assigned a rate and the best fit rate was instead just
getting lucky based on the ordering of the rate table, fix this up so the
code actually does what it was intended to do originally.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The use of highest and lowest in clk_rate_table_round() is completely bogus
and superfluous. Remove it.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

To actually output the _new_ clock rate it first has to be set.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch is V2 of the SH clock framework move from
arch/sh/kernel/cpu/clock.c to drivers/sh/clk.c. All
code except the following functions are moved:
clk_init(), clk_get() and clk_put().

The init function is still kept in clock.c since it
depends on the SH-specific machvec implementation.

The symbols clk_get() and clk_put() already exist in
the common ARM clkdev code, those symbols are left in
the SH tree to avoid duplicating them for SH-Mobile ARM.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now when all clocks are registered using clkdev,
get rid of the special SH-specific clock lookup.

Also ditch the unused module ref counting code.
This patch syncs the SH behaviour with ARM.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Rewinding each debugfs entries to unregister if an error happens.

Based on the commit ca4caa4eSigned-off-by: NHiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Modify the SuperH clock code to support struct clk
with NULL as name. Such clocks will not be hooked
up to debugfs.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This rolls in the remainder of the clkdev API bits from the ARM tree.
This can more or less be used verbatim, so we just copy it over and nuke
our local version.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch was generated by

	git grep -E -i -l 'precidence' | xargs -r perl -p -i -e 's/precidence/precedence/'
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Signed-off-by: NMarek Skuczynski <mareksk7@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch updates the div6 clock helper code to add support
for enable(), disable() and set_rate() callbacks.

Needed by the camera clock enabling board code on Migo-R.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch removes the ->build_rate_table() callback,
->recalc() may instead be used for this purpose.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Add SuperH-specific clock framework helper functions:
- clk_rate_table_build() - build cpufreq table from divisors/multipliers
- clk_rate_table_round() - use cpufreq table to find matching frequency
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This plugs in all of the MSTP functions in to the clock framework,
and hands them off to the platform devices that want them.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adopts the OMAP clock framework debugfs bits and replaces the aging
procfs bits. The procfs clocks entry was primarily a debugging aid, and
used to be tied in to cpuinfo before the clock list grew too unweildly.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This adds support for constructing a rate table by looking at potential
divisors for a specified clock. Each FQRMR clock is given its own table.
Presently each table is rebuilt when the parent propagates down a new
rate, so some more logic needs to be added to do this more intelligently.

Additionally, a fairly generic round_rate() implementation is then
layered on top of it, which subsequently provides us with cpufreq support.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>