Commit Graph

113 Commits

Author SHA1 Message Date
Paul Mundt
dfcd6e4389 Merge branch 'common/clkfwk' into sh-fixes-for-linus 2010-11-19 16:43:23 +09:00
Paul Mundt
f278ea849e sh: clkfwk: Build fix for non-legacy CPG changes.
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: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-19 16:40:35 +09:00
Paul Mundt
849653372d Merge branch 'common/clkfwk' into sh-fixes-for-linus 2010-11-16 10:11:20 +09:00
Paul Mundt
35a96c739f sh: clkfwk: Kill off now unused algo_id in set_rate op.
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: Paul Mundt <lethal@linux-sh.org>
2010-11-15 18:25:17 +09:00
Paul Mundt
9a1683d1dd sh: clkfwk: Kill off unused clk_set_rate_ex().
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: Paul Mundt <lethal@linux-sh.org>
2010-11-15 18:25:12 +09:00
Paul Mundt
6318af900c sh: intc: Fix up build failure introduced by radix tree changes.
The radix tree retry logic got a bit of an overhaul and subsequently
broke the virtual IRQ subgroup build. Simply switch over to
radix_tree_deref_retry() as per the filemap changes, which the virq
lookup logic was modelled after in the first place.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-15 14:30:30 +09:00
Paul Mundt
ed10b490ea sh: clkfwk: fix up compiler warnings.
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: Paul Mundt <lethal@linux-sh.org>
2010-11-10 18:02:25 +09:00
Paul Mundt
21e1426628 Merge branches 'sh/pio-death', 'sh/nommu', 'sh/clkfwk', 'sh/core' and 'sh/intc-extension' into sh-fixes-for-linus 2010-11-08 09:42:43 +09:00
Paul Mundt
a766b29790 sh: clkfwk: Fix up checkpatch warnings.
The clk_round_parent() change introduced various checkpatch warnings,
tidy them up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-08 09:40:23 +09:00
Guennadi Liakhovetski
6af26c6c99 sh: add clk_round_parent() to optimize parent clock rate
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: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-08 09:35:26 +09:00
Paul Mundt
20f95e0b22 sh: intc: Update for single IRQ reservation helper.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-01 16:10:48 -04:00
Paul Mundt
5aefa34fad sh: clkfwk: Fix up rate rounding error handling.
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: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-11-01 15:30:31 -04:00
Paul Mundt
63111a3a70 sh: intc: switch irq_desc iteration to new active IRQ iterator.
There's no need to iterative over every single irq_desc when we can
already work out which IRQs have a backing descriptor via the shiny new
for_each_active_irq(). Switch to that instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-28 11:36:31 +09:00
Paul Mundt
26599a94dc sh: intc: irq_data conversion.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-27 15:42:10 +09:00
Paul Mundt
c053784454 sh: maple: ctrl_in/outX to __raw_read/writeX conversion.
The ctrl_xxx routines are deprecated, switch over to the __raw_xxx
versions.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-27 14:34:41 +09:00
Paul Mundt
38ab13441c sh: Switch dynamic IRQ creation to generic irq allocator.
Now that the genirq code provides an IRQ bitmap of its own and the
necessary API to manipulate it, there's no need to keep our own version
around anymore.

In the process we kill off some unused IRQ reservation code, with future
users now having to tie in to the genirq API as normal.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-26 16:05:08 +09:00
Thomas Gleixner
c4318baf00 sh: Sanitize sparse irq
Switch over to the new allocator functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-26 15:01:52 +09:00
Paul Mundt
de9186c257 sh: clkfwk: Shuffle around to match the intc split up.
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: Paul Mundt <lethal@linux-sh.org>
2010-10-18 21:32:58 +09:00
Kuninori Morimoto
c2590f4a8d sh: clkfwk: modify for_each_frequency end condition
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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-18 20:33:10 +09:00
Paul Mundt
e5690e0dcf sh: clkfwk: Fix fault in frequency iterator.
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: Paul Mundt <lethal@linux-sh.org>
2010-10-16 00:51:05 +09:00
Paul Mundt
8e122db61c sh: clkfwk: Add a helper for rate rounding by divisor ranges.
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: Paul Mundt <lethal@linux-sh.org>
2010-10-15 18:33:24 +09:00
Paul Mundt
f586903d27 sh: clkfwk: Abstract rate rounding helper.
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: Paul Mundt <lethal@linux-sh.org>
2010-10-15 18:17:35 +09:00
Paul Mundt
28085bc5de sh: clkfwk: support clock remapping.
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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-15 16:46:37 +09:00
Paul Mundt
550a1ef18a sh: use pr_fmt for clock framework, too.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-13 19:24:55 +09:00
Magnus Damm
69395396a0 sh: remove name and id from struct clk
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: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-13 19:23:05 +09:00
Paul Mundt
6966fed9d8 sh: intc: Fix build with IRQ balancing disabled.
The balancing stubs obviously need to be static inline..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-06 16:44:10 +09:00
Paul Mundt
33fc1a211c sh: intc: Add missing files.
The Kconfig and Makefile were overlooked, add those in now to improve
odds of building.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-06 15:38:16 +09:00
Paul Mundt
2be6bb0c79 sh: intc: Split up the INTC code.
This splits up the sh intc core in to something more vaguely resembling
a subsystem. Most of the functionality was alread fairly well
compartmentalized, and there were only a handful of interdependencies
that needed to be resolved in the process.

This also serves as future-proofing for the genirq and sparseirq rework,
which will make some of the split out functionality wholly generic,
allowing things to be killed off in place with minimal migration pain.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-05 22:10:30 +09:00
Paul Mundt
d74310d3b1 sh: intc: Handle early lookups of subgroup IRQs.
If lookups happen while the radix node still points to a subgroup
mapping, an IRQ hasn't yet been made available for the specified id, so
error out accordingly. Once the slot is replaced with an IRQ mapping and
the tag is discarded, lookup can commence as normal.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-05 18:13:23 +09:00
Paul Mundt
c1e30ad98f sh: intc: Support virtual mappings for IRQ subgroups.
Many interrupts that share a single mask source but are on different
hardware vectors will have an associated register tied to an INTEVT that
denotes the precise cause for the interrupt exception being triggered.

This introduces the concept of IRQ subgroups in the intc core, where
a virtual IRQ map is constructed for each of the pre-defined cause bits,
and a higher level chained handler takes control of the parent INTEVT.
This enables CPUs with heavily muxed IRQ vectors (especially across
disjoint blocks) to break things out in to a series of managed chained
handlers while being able to dynamically lookup and adopt the IRQs
created for them.

This is largely an opt-in interface, requiring CPUs to manually submit
IRQs for subgroup splitting, in addition to providing identifiers in
their enum maps that can be used for lazy lookup via the radix tree.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-05 04:47:03 +09:00
Paul Mundt
44629f57ac sh: intc: Implement reverse mapping for IRQs to per-controller IDs.
This implements a scheme roughly analogous to the PowerPC virtual to
hardware IRQ mapping, which we use for IRQ to per-controller ID mapping.
This makes it possible for drivers to use the IDs directly for lookup
instead of hardcoding the vector.

The main motivation for this work is as a building block for dynamically
allocating virtual IRQs for demuxing INTC events sharing a single INTEVT
in addition to a common masking source.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-05 01:15:47 +09:00
Paul Mundt
e8184a47c9 sh: pfc: Fix up BUG() triggered by gpiolib debugfs lookups.
The gpiolib debugfs entry takes a hammer approach and iterates over all
of the potential GPIOs, regardless of their type. The SH PFC code on the
other hand contains a variable mismash of input/output/function types
spread out sparsely, leading to situations where the debug code can
trigger an out of range enum for the type. Since we already have an error
path for out of range enums, we can just hand that up to the higher level
instead of the current BUG() behaviour.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-04 05:15:20 +09:00
Paul Mundt
b72421d8aa sh: pfc: support pinmux deregistration.
Presently the pinmux code is a one-way thing, but there's nothing
preventing an unregistration if no one has grabbed any of the pins.
This will permit us to save a bit of memory on systems that require pin
demux for certain peripherals in the case where registration of those
peripherals fails, or they are otherwise not attached to the system.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-04 03:54:56 +09:00
Paul Mundt
4bacd796cc sh: Support early IRQ vector map reservation for delayed controllers.
Some controllers will need to be initialized lazily due to pinmux
constraints, while others may simply have no need to be brought online if
there are no backing devices for them attached. In this case it's still
necessary to be able to reserve their hardware vector map before dynamic
IRQs get a hold of them.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-02 22:02:07 +09:00
Paul Mundt
f9d885c3e5 sh: Support IRQ balancing for SH-X3 proto cores, too.
This adds in hardware IRQ auto-distribution support for SH-X3 proto CPUs,
following the SH7786 support.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-02 01:04:30 +09:00
Paul Mundt
960bc368e7 sh: reinstate clock framework rate rounding.
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: Paul Mundt <lethal@linux-sh.org>
2010-08-20 19:10:38 +09:00
Paul Mundt
bbcf6e8b66 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	arch/sh/include/asm/Kbuild
	drivers/Makefile

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-16 13:32:24 +09:00
Guennadi Liakhovetski
b3dd51a8a6 sh: add a reparent function to DIV6 clocks
Add support for reparenting of div6 clocks on SuperH and SH-Mobile SoCs.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04 16:12:01 +09:00
Paul Mundt
285eba57db Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	include/linux/serial_sci.h

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-07-05 15:46:08 +09:00
Guennadi Liakhovetski
088bcc2aff sh: remove bogus highest / lowest logic from clock rate rounding
The use of highest and lowest in clk_rate_table_round() is completely bogus
and superfluous. Remove it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-07-02 18:07:51 +09:00
Guennadi Liakhovetski
c45f6f1026 sh: move a debug printk() to a more meaningful location in the clock driver
To actually output the _new_ clock rate it first has to be set.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-07-02 18:04:27 +09:00
Paul Mundt
ac422f9443 sh: Make intc messages consistent via pr_fmt.
Wrapping pr_fmt to the KBUILD_MODNAME prefix seems to be the trendy
thing to do these days, so just do that instead of manually tidying
up the stragglers.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-06-02 18:10:00 +09:00
Magnus Damm
e47bb515c5 ARM: mach-shmobile: Use shared clock framework
Teach SH-Mobile ARM how to make use of the shared SH clock
framework. This commit is one atomic switch that dumps the
local hackery and instead links in the shared clock framework
code in drivers/sh. A few local functions are kept in clock.c.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-05-20 12:05:45 +09:00
Guennadi Liakhovetski
f5ca6d4cbd sh: simplify WARN usage in SH clock driver
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-05-13 17:43:11 +09:00
Magnus Damm
fa676ca394 sh: move sh clock-cpg.c contents to drivers/sh/clk-cpg.c
Move the CPG helpers to drivers/sh/clk-cpg.c V2.

This to allow SH-Mobile ARM to share the code with
SH. All functions except the legacy CPG stuff is moved.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-05-13 17:39:22 +09:00
Magnus Damm
8b5ee113e1 sh: move sh clock.c contents to drivers/sh/clk.
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: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-05-13 17:39:14 +09:00
Paul Mundt
e19553427c Merge branch 'sh/stable-updates'
Conflicts:
	arch/sh/kernel/dwarf.c
	drivers/dma/shdma.c

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-26 16:08:27 +09:00
Paul Mundt
dc825b1790 sh: intc: IRQ auto-distribution support.
This implements support for hardware-managed IRQ balancing as implemented
by SH-X3 cores (presently only hooked up for SH7786, but can probably be
carried over to other SH-X3 cores, too).

CPUs need to specify their distribution register along with the mask
definitions, as these follow the same format. Peripheral IRQs that don't
opt out of balancing will be automatically distributed at the whim of the
hardware block, while each CPU needs to verify whether it is handling the
IRQ or not, especially before clearing the mask.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-15 13:13:52 +09:00
Paul Mundt
43b8774dc4 sh: intc: userimask support.
This adds support for hardware-assisted userspace irq masking for
special priority levels. Due to the SR.IMASK interactivity, only some
platforms implement this in hardware (including but not limited to
SH-4A interrupt controllers, and ARM-based SH-Mobile CPUs). Each CPU
needs to wire this up on its own, for now only SH7786 is wired up as an
example.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-13 14:43:03 +09:00
Paul Mundt
12129fea50 sh: intc: Tidy up loglevel mismatches.
The printk loglevels are all over the place, make them a bit more
coherent, and add some registration notification while we're at it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-13 13:49:54 +09:00