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path: root/include/linux/sh_clk.h
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* sh: clkfwk: Support variable size accesses for MSTP clocks.Paul Mundt2012-04-111-3/+31
| | | | | | | | | The bulk of the MSTP users require 32-bit access, but this isn't the case for some of the SH-2A parts, so add in some basic infrastructure to let the CPU define its required access size in preparation. Requested-by: Phil Edworthy <phil.edworthy@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: remove clk_opsMagnus Damm2012-03-121-3/+2
| | | | | | | | Now when all clk_ops have been renamed it is safe to rename clk_ops to sh_clk_ops. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* sh: introduce sh_clk_ops in parallel with clk_opsMagnus Damm2012-03-121-0/+2
| | | | | | | Introduce sh_clk_ops in parallel with clk_ops. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* sh: extend clock struct with mapped_reg memberMagnus Damm2011-12-091-0/+1
| | | | | | | | Add a "mapped_reg" member to struct clk and use that to keep the ioremapped register based on enable_reg. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: setup clock parent from current register valueKuninori Morimoto2011-11-241-3/+6
| | | | | | | | | | | Some clocks can select its parent clock by CPG register. But it might have been modified by boot-loader or something. This patch removed fixed initial parent clock, and setup it from their current register settings. It works on div6 reparent clocks for now. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Kill off remaining debugfs cruft.Paul Mundt2011-11-111-1/+0
| | | | | | | | | 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: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: add clk_rate_mult_range_round()Kuninori Morimoto2011-11-051-0/+3
| | | | | | | | | 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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: move CLKDEV_xxx_ID macro to sh_clk.hKuninori Morimoto2011-07-111-0/+4
| | | | | Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Disable init clk op for non-legacy clocks.Paul Mundt2010-11-151-0/+2
| | | | | | | Presently it's only legacy users that are using this clock op, guard it with an ifdef to ensure that no new users start using it. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Kill off now unused algo_id in set_rate op.Paul Mundt2010-11-151-1/+1
| | | | | | | | 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>
* sh: clkfwk: Kill off unused clk_set_rate_ex().Paul Mundt2010-11-151-30/+0
| | | | | | | | 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>
* sh: add clk_round_parent() to optimize parent clock rateGuennadi Liakhovetski2010-11-081-0/+4
| | | | | | | | | | | 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>
* sh: clkfwk: Add a helper for rate rounding by divisor ranges.Paul Mundt2010-10-151-0/+3
| | | | | | | | | | | | | | | 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>
* sh: clkfwk: Abstract rate rounding helper.Paul Mundt2010-10-151-0/+1
| | | | | | | | | | | | | 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>
* sh: clkfwk: support clock remapping.Paul Mundt2010-10-151-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* sh: remove name and id from struct clkMagnus Damm2010-10-131-3/+0
| | | | | | | | | | 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>
* sh: add a reparent function to DIV6 clocksGuennadi Liakhovetski2010-08-041-5/+14
| | | | | | | | 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>
* sh: add a list of parent configurations to struct clkGuennadi Liakhovetski2010-08-041-0/+4
| | | | | | | | | | | Many system clocks can select a parent by writing a value to a specific field in the configuration register. Add a list of parents and location and width of the source selection field in the clock configuration register to struct clk to assist in clk_set_parent() implementation. 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>
* sh: fixup the docbook paths for clock framework shuffling.Paul Mundt2010-05-131-2/+1
| | | | | | | Now that the definitions have been consolidated in an alternate header, update the template accordingly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: move sh clock.c contents to drivers/sh/clk.Magnus Damm2010-05-131-1/+1
| | | | | | | | | | | | | | | | | 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>
* sh: move sh asm/clock.h contents to linux/sh_clk.h V2Magnus Damm2010-05-131-0/+151
This patch is V2 of the clock framework move from arch/sh/include/asm/clock.h to include/linux/sh_clk.h and updates the include paths for files that will be shared between SH and SH-Mobile ARM. The file asm/clock.h is still kept in this version, this to depend on as few files as possible at this point. We keep SH specific stuff in there. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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