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* drivers: sh: clk: Avoid crashes when passing NULL clocksGeert Uytterhoeven2015-11-241-0/+12
| | | | | | | | | | | | | Several clock API functions handle NULL clocks when the Common Clock Framework is used, while their legacy SH counterparts don't, and would just crash when a NULL clock is passed. Add NULL checks to clk_get_rate(), clk_set_rate(), clk_get_parent(), and clk_round_rate(), to avoid different behavior in drivers shared between legacy and CCF-based platforms. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
* drivers: sh: clk: Remove obsolete and unused clk_round_parent()Geert Uytterhoeven2015-11-241-88/+0
| | | | | | | | | | | clk_round_parent() was only ever used by AP4EVB, until commit b24bd7e97b3784af ("ARM: shmobile: Remove AP4EVB board support"). The Common Clock Framework does not provide clk_round_parent(), hence remove it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
* sh: clk: Use cpufreq_for_each_valid_entry macro for iterationStratos Karafotis2014-04-301-15/+5
| | | | | | | | | | | The cpufreq core now supports the cpufreq_for_each_valid_entry macro helper for iteration over the cpufreq_frequency_table, so use it. It should have no functional changes. Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* ARM: shmobile: wait for MSTP clock status to toggle, when enabling itGuennadi Liakhovetski2014-02-041-0/+38
| | | | | | | | | On r-/sh-mobile SoCs MSTP clocks are used by the runtime PM to dynamically enable and disable peripheral clocks. To make sure the clock has really started we have to read back its status register until it confirms success. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
* cpufreq: rename index as driver_data in cpufreq_frequency_tableViresh Kumar2013-06-041-2/+2
| | | | | | | | | | | | | | | | | The "index" field of struct cpufreq_frequency_table was never an index and isn't used at all by the cpufreq core. It only is useful for cpufreq drivers for their internal purposes. Many people nowadays blindly set it in ascending order with the assumption that the core will use it, which is a mistake. Rename it to "driver_data" as that's what its purpose is. All of its users are updated accordingly. [rjw: Changelog] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* sh: clkfwk: bugfix: sh_clk_div_enable() care sh_clk_div_set_rate() if div6Kuninori Morimoto2013-01-111-0/+6
| | | | | | | | | | | | 764f4e4e33d18cde4dcaf8a0d860b749c6d6d08b (sh: clkfwk: Use shared sh_clk_div_enable/disable()) shared enable/disable funcions for div4/div6. But new sh_clk_div_enable() didn't care sh_clk_div_set_rate() which is required on div6 clock. This patch fixes it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: fixup unsed variable warningKuninori Morimoto2012-11-131-1/+0
| | | | | | | | | | This patch solves above warning ${LINUX}/drivers/sh/clk/cpg.c:404:6: warning: \ unused variable 'val' [-Wunused-variable] Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Simon Horman <horms@verge.net.au>
* sh: clkfwk: add sh_clk_fsidiv_register()Kuninori Morimoto2012-11-081-0/+86
| | | | | | | | This patch adds sh_clk_fsidiv_register() to share FSI-DIV clock code Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Simon Horman <horms@verge.net.au>
* sh: clkfwk: Consolidate div clk registration helper.Paul Mundt2012-05-251-107/+75
| | | | | | | | | This consolidates the div6/4 versions of the clk registration wrapper. The existing wrappers with their own sh_clk_ops are maintained for API compatability, though in the future it should be possible to be rid of them entirely. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Consolidate div6/div4 clk_ops definitions.Paul Mundt2012-05-251-25/+17
| | | | | | | Everything with the exception of the _reparent ops are now shared, so switch everything over to common types. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Use shared sh_clk_div_enable/disable().Paul Mundt2012-05-251-43/+34
| | | | | | | | | | This introduces a new flag for clocks that need to have their divisor ratio set back to their initial mask at disable time to prevent interactivity problems with the clock stop bit (presently div6 only). With this in place it's possible to handle the corner case on top of the div4 op without any particular need for leaving things split out. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Use shared sh_clk_div_set_rate()Paul Mundt2012-05-251-42/+28
| | | | | | Follows the sh_clk_div_recalc() change. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Use shared sh_clk_div_recalc().Paul Mundt2012-05-251-36/+26
| | | | | | | This generalizes the div4 recalc routine for use by div6 and others, then makes it the default. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Introduce a div_mask for variable div types.Paul Mundt2012-05-251-5/+5
| | | | | | | | This plugs in a div_mask for the clock and sets it up for the existing div6/4 cases. This will make it possible to support other div types, as well as share more div6/4 infrastructure. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Move to common clk_div_table accessors for div4/div6.Paul Mundt2012-05-251-11/+35
| | | | | | | | This plugs in a generic clk_div_table, based on the div4 version. div6 is then adopted to use it for encapsulating its div table, which permits us to start div6/4 unification, as well as preparation for other div types. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Support variable size accesses for div4/div6 clocks.Paul Mundt2012-04-121-34/+37
| | | | | | | | This follows the MSTP clock change and implements variable access size support for the rest of the CPG clocks, too. Upcoming SH-2A support has need of this for 16-bit div4 clocks, while others will follow. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: Support variable size accesses for MSTP clocks.Paul Mundt2012-04-111-11/+27
| | | | | | | | | 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: convert cpg code to sh_clk_opsMagnus Damm2012-03-121-8/+8
| | | | | | | Convert the CPG code to use sh_clk_ops. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* sh: clkfwk: bugfix: use clk_reparent() for div6 clocksKuninori Morimoto2012-01-241-1/+1
| | | | | | | | Various problems will happen if clk parent was set up directly. it should use clk_reparent() Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: sh_clk_init_parent() should be called after clk_register()Kuninori Morimoto2012-01-101-2/+2
| | | | | | | | sh_clk_init_parent() are using clk->mapped_reg which is mapped in clk_register() Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: use ioread32/iowrite32 and mapped_reg for div6Magnus Damm2011-12-091-10/+10
| | | | | | | | Convert the CPG DIV6 helper code to use the new mapped_reg together with ioread32() and iowrite32(). Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: use ioread32/iowrite32 and mapped_reg for div4Magnus Damm2011-12-091-8/+8
| | | | | | | | Convert the CPG DIV4 helper code to use the new mapped_reg together with ioread32() and iowrite32(). Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: use ioread32/iowrite32 and mapped_reg for mstp32Magnus Damm2011-12-091-4/+4
| | | | | | | | Convert the CPG MSTP32 helper code to use the new mapped_reg together with ioread32() and iowrite32(). Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: extend clock struct with mapped_reg memberMagnus Damm2011-12-091-2/+7
| | | | | | | | 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 Morimoto2011-11-241-0/+35
| | | | | | | | | | | 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 Mundt2011-11-111-87/+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/+20
| | | | | | | | | 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>
* Merge branch 'sh-latest' of ↵Linus Torvalds2011-08-011-2/+27
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x * 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x: (39 commits) SH: static should be at beginning of declaration sh: move CLKDEV_xxx_ID macro to sh_clk.h sh: clock-shx3: add CLKDEV_ICK_ID for cleanup sh: clock-sh7786: add CLKDEV_ICK_ID for cleanup sh: clock-sh7785: add CLKDEV_ICK_ID for cleanup sh: clock-sh7757: add CLKDEV_ICK_ID for cleanup sh: clock-sh7366: add CLKDEV_ICK_ID for cleanup sh: clock-sh7343: add CLKDEV_ICK_ID for cleanup sh: clock-sh7722: add CLKDEV_ICK_ID for cleanup sh: clock-sh7724: add CLKDEV_ICK_ID for cleanup sh: clock-sh7366: modify I2C clock settings sh: clock-sh7343: modify I2C clock settings sh: clock-sh7723: modify I2C clock settings sh: clock-sh7722: modify I2C clock settings sh: clock-sh7724: modify I2C clock settings serial: sh-sci: Fix up pretty name printing for port IRQs. serial: sh-sci: Kill off per-port enable/disable callbacks. serial: sh-sci: Add missing module description/author bits. serial: sh-sci: Regtype probing doesn't need to be fatal. sh: Tidy up pre-clkdev clk_get() error handling. ...
| * sh: clkfwk: Convert to IS_ERR_OR_NULL.Paul Mundt2011-06-241-1/+1
| | | | | | | | | | | | Trivial cleanup. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * drivers: sh: late disabling of clocks V2Magnus Damm2011-06-241-1/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: Magnus Damm <damm@opensource.se> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | switch assorted clock drivers to debugfs_remove_recursive()Al Viro2011-07-201-5/+2
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* drivers: sh: resume enabled clocks fixMagnus Damm2011-06-141-1/+1
| | | | | | | | | | | | 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: Magnus Damm <damm@opensource.se> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: clkfwk: fixup clk_rate_table_build parameter in div6 clockKuninori Morimoto2011-04-181-1/+1
| | | | | | | | | | div6 clock should not use arch_flags for clk_rate_table_build, because SH_CLK_DIV6_EXT doesn't care .arch_flags. clk->freq_table[] will be all CPUFREQ_ENTRY_INVALID without this patch. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: stable@kernel.org Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Use struct syscore_ops instead of sysdevsRafael J. Wysocki2011-03-231-50/+18
| | | | | | | | | | | | | | | | | | | 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: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* headers: kobject.h reduxAlexey Dobriyan2011-01-101-1/+0
| | | | | | | | Remove kobject.h from files which don't need it, notably, sched.h and fs.h. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sh: clkfwk: Build fix for non-legacy CPG changes.Paul Mundt2010-11-192-1/+4
| | | | | | | | | 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>
* sh: clkfwk: Kill off now unused algo_id in set_rate op.Paul Mundt2010-11-152-6/+4
| | | | | | | | 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 Mundt2010-11-151-9/+3
| | | | | | | | 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: clkfwk: fix up compiler warnings.Paul Mundt2010-11-101-2/+2
| | | | | | | | | 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>
* sh: clkfwk: Fix up checkpatch warnings.Paul Mundt2010-11-081-5/+22
| | | | | | | The clk_round_parent() change introduced various checkpatch warnings, tidy them up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: add clk_round_parent() to optimize parent clock rateGuennadi Liakhovetski2010-11-081-0/+75
| | | | | | | | | | | 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: Fix up rate rounding error handling.Paul Mundt2010-11-011-2/+2
| | | | | | | | | | 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>
* sh: clkfwk: Shuffle around to match the intc split up.Paul Mundt2010-10-183-0/+1056
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>
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