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* clk: versatile: delete old RealView clock implementationLinus Walleij2017-06-022-98/+0
| | | | | | | | | The old RealView clock implementation is not used anymore (nothing in the kernel calls realview_clk_init()) as we have moved all clocks over to device tree. Delete it. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* ARM/clk: move the ICST library to drivers/clkLinus Walleij2017-04-079-3/+170
| | | | | | | | | | | | | | | | This moves the ICST clock divider helper library from arch/arm/common to drivers/clk/versatile so it is maintained with the other clock drivers. We keep the structure as a helper library intact and do not fuse it with the clk-icst.c Versatile ICST clock driver: there may be other users out there that need to use this library for their clocking, and then it will be helpful to keep the library contained. (The icst.[c|h] files could just be moved to drivers/clk/lib or a similar location to share the library.) Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* clk: versatile/icst: support for AP baseboard clocksLinus Walleij2016-08-291-0/+136
| | | | | | | | | | | | This adds support for the two ICST525-based clocks on the Integrator/AP baseboard, as documented in the board manual "Integrator/AP ASIC Development Motherboard", ARM DUI0098 B, pages 3-15 thru 3-18. Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> [sboyd@codeaurora.org: fixed uninitialized val warning] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile/icst: add Integrator core module clocksLinus Walleij2016-08-251-14/+160
| | | | | | | | | | | | | | | | | | | | | | | | | | The Integrator/AP and Integrator/CP have special derivatives of the ICST525 control registers, where some bits have been hardwired but others are possible to adjust, resulting in a control register that makes it possible to set an even, desired megahertz value. The Integrator/AP and Integrator/CP have slightly different layout so we support them using different compatible strings. After adding these clocks, the Integrator-specific cpufreq driver can be switched over to use the generic operating point device tree cpufreq driver. Instead of simply writing a value to the oscillator control register we switch to the more elaborate method of providing a bitmask and use regmap_update_bits() to poke the right bits for the desired frequency, this is needed since these control registers sometimes control more than one clock. Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: Remove CLK_IS_ROOTStephen Boyd2016-03-154-9/+6
| | | | | | | | This flag is a no-op now. Remove usage of the flag. Cc: Pawel Moll <pawel.moll@arm.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: sp810: support reentranceLinus Walleij2016-02-251-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Despite care take to allocate clocks state containers the SP810 driver actually just supports creating one instance: all clocks registered for every instance will end up with the exact same name and __clk_init() will fail. Rename the timclken<0> .. timclken<n> to sp810_<instance>_<n> so every clock on every instance gets a unique name. This is necessary for the RealView PBA8 which has two SP810 blocks: the second block will not register its clocks unless every clock on every instance is unique and results in boot logs like this: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at ../drivers/clk/versatile/clk-sp810.c:137 clk_sp810_of_setup+0x110/0x154() Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc2-00030-g352718fc39f6-dirty #225 Hardware name: ARM RealView Machine (Device Tree Support) [<c00167f8>] (unwind_backtrace) from [<c0013204>] (show_stack+0x10/0x14) [<c0013204>] (show_stack) from [<c01a049c>] (dump_stack+0x84/0x9c) [<c01a049c>] (dump_stack) from [<c0024990>] (warn_slowpath_common+0x74/0xb0) [<c0024990>] (warn_slowpath_common) from [<c0024a68>] (warn_slowpath_null+0x1c/0x24) [<c0024a68>] (warn_slowpath_null) from [<c051eb44>] (clk_sp810_of_setup+0x110/0x154) [<c051eb44>] (clk_sp810_of_setup) from [<c051e3a4>] (of_clk_init+0x12c/0x1c8) [<c051e3a4>] (of_clk_init) from [<c0504714>] (time_init+0x20/0x2c) [<c0504714>] (time_init) from [<c0501b18>] (start_kernel+0x244/0x3c4) [<c0501b18>] (start_kernel) from [<7000807c>] (0x7000807c) ---[ end trace cb88537fdc8fa200 ]--- Cc: Michael Turquette <mturquette@baylibre.com> Cc: Pawel Moll <pawel.moll@arm.com> Fixes: 6e973d2c4385 "clk: vexpress: Add separate SP810 driver" Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: mask VCO bits before writingLinus Walleij2016-02-101-0/+3
| | | | | | | | | | | | | | | | The Versatile syscon ICST driver OR:s the bits into place but forgets to mask the previous value, making the code only work if the register is zero or giving haphazard results. Mask the 19 bits used by the Versatile syscon interface register. Regression caused and now fixed by yours truly. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-clk@vger.kernel.org Fixes: 179c8fb3c2a6 ("clk: versatile-icst: convert to use regmap") Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* Merge tag 'armsoc-multiplatform' of ↵Linus Torvalds2016-01-203-37/+172
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC multiplatform code updates from Arnd Bergmann: "This branch is the culmination of 5 years of effort to bring the ARMv6 and ARMv7 platforms together such that they can all be enabled and boot the same kernel. It has been a tremendous amount of cleanup and refactoring by a huge number of people, and creation of several new (and major) subsystems to better abstract out all the platform details in an appropriate manner. The bulk of this branch is a large patchset from Arnd that brings several of the more minor and older platforms we have closer to multiplatform support. Among these are MMP, S3C64xx, Orion5x, mv78xx0 and realview Much of this is moving around header files from old mach directories, but there are also some cleanup patches of debug_ll (lowlevel debug per-platform options) and other parts. Linus Walleij also has some patchs to clean up the older ARM Realview platforms by finally introducing DT support, and Rob Herring has some for ARM Versatile which is now DT-only. Both of these platforms are now multiplatform. Finally, a couple of patches from Russell for Dove PMU, and a fix from Valentin Rothberg for Exynos ADC, which were rebased on top of the series to avoid conflicts" * tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (75 commits) ARM: realview: don't select SMP_ON_UP for UP builds ARM: s3c: simplify s3c_irqwake_{e,}intallow definition ARM: s3c64xx: fix pm-debug compilation iio: exynos-adc: fix irqf_oneshot.cocci warnings ARM: realview: build realview-dt SMP support only when used ARM: realview: select apropriate targets ARM: realview: clean up header files ARM: realview: make all header files local ARM: no longer make CPU targets visible separately ARM: integrator: use explicit core module options ARM: realview: enable multiplatform ARM: make default platform work for NOMMU ARM: debug-ll: move DEBUG_LL_UART_EFM32 to correct Kconfig location ARM: defconfig: use correct debug_ll settings ARM: versatile: convert to multi-platform ARM: versatile: merge mach code into a single file ARM: versatile: switch to DT only booting and remove legacy code ARM: versatile: add DT based PCI detection ARM: pxa: mark ezx structures as __maybe_unused ARM: pxa: mark raumfeld init functions as __maybe_unused ...
| * Merge tag 'realview-base-armsoc-1-tag' of ↵Arnd Bergmann2015-12-163-36/+169
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator into next/multiplatform Merge "Realview multiplatform support" from Linus Walleij: The board and infrastructure changes for RealView multiplatform and extended DT support. * tag 'realview-base-armsoc-1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator: ARM: realview: add an DT SMP boot method ARM: realview: select SP810 and ICST for the DT variant soc: versatile: add support for the PB11MPCore clk: versatile-icst: add device tree support clk: versatile-icst: refactor to allocate regmap separately clk: versatile-icst: convert to use regmap ARM: realview: remove private barrier implementation ARM: no longer force unbuffered DMA for realview clk/realview: stop using machine headers ARM: realview: don't map undefined PCI registers ARM: realview: remove sparsemem hack Conflicts: drivers/clk/versatile/Kconfig
| | * clk: versatile-icst: add device tree supportLinus Walleij2015-12-151-1/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for the ARM syscon ICST clocks to initialized directly from the device tree syscon node on ARM Integrator, Versatile and RealView reference designs. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-clk@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| | * clk: versatile-icst: refactor to allocate regmap separatelyLinus Walleij2015-12-151-19/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Break out the registration function so it creates a regmap and pass to the setup function, so the latter can be shared with a device tree probe function that already has a regmap. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-clk@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| | * clk: versatile-icst: convert to use regmapLinus Walleij2015-12-152-28/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of passing around register bases, pass around a regmap in this driver. This refactoring make things so much easier when we later want to manage an ICST that is part of a syscon. Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-clk@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| | * clk/realview: stop using machine headersArnd Bergmann2015-12-151-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to move realview into multiplatform, we have to prevent device drivers from accessing the machine header files. In case of the clk driver, this is very simple, we just copy the small set of register definitions into the driver that needs them. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| * | ARM: versatile: switch to DT only booting and remove legacy codeRob Herring2015-12-151-1/+3
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With DT support for clocks, irqchips, timers, and PCI now in place, DT based booting has feature parity with non-DT legacy boot. The final piece is actually enabling common clock support on Versatile. Enabling full DT support requires either removing the old Versatile clock code, updating the legacy boot to use the common clock code, or making DT and legacy boot mutually exclusive. Given that removing legacy boot code is the goal anyway, I am going with the 1st option. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | clk: versatile: remove unneeded error messageSudip Mukherjee2015-11-201-3/+1
| | | | | | | | | | | | | | | | If kzalloc fails we will already have many messages in the log and we do not need another message to know that kzalloc for sp810 has failed. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* | clk: versatile: fix memory leakSudip Mukherjee2015-11-181-0/+1
|/ | | | | | | | If of_clk_parent_fill() fails then we printed an error message and returned. But we missed freeing sp810. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile-icst: fix memory leakLinus Walleij2015-10-231-1/+3
| | | | | | | | | | A static code checker found a memory leak in the Versatile ICST code. Fix it. Fixes: a183da637c52 "clk: versatile: respect parent rate in ICST clock" Reported-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: Allow drivers to build if COMPILE_TEST is enabledJavier Martinez Canillas2015-10-161-1/+1
| | | | | | | | | | | | These drivers only have runtime but no build time dependencies so can be built for testing purposes if the Kconfig COMPILE_TEST option is enabled. This is useful to have more build coverage and make sure that drivers are not affected by changes that could cause build regressions. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Acked-by: Scott Branden <sbranden@broadcom.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* drivers/clk: appropriate __init annotation for const dataNicolas Pitre2015-08-242-3/+3
| | | | | | | | | | | | Init data marked const should be annotated with __initconst for correctness and not __initdata. This also fixes LTO builds that otherwise fail with section mismatch errors. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Michael Turquette <mturquette@baylibre.com> [sboyd@codeaurora.org: Dropped hunks that moved const char * arrays to const char * const] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: Switch to assigned clock parentsStephen Boyd2015-08-241-61/+15
| | | | | | | | | | | | | | | We're removing struct clk from the clk provider API. This code is calling the consumer APIs to change the parent to a 1 MHz fixed rate clock for each of the clocks that the driver provides. Move to using the assigned-clock-parents DT property for this instead. Because this is an ABI break, detect if the property is missing and fall back to setting the parent explicitly before the clocks are registered. Acked-by: Pawel Moll <pawel.moll@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: off by one in clk_sp810_timerclken_of_get()Dan Carpenter2015-07-291-2/+2
| | | | | | | | | The ">" should be ">=" or we end up reading beyond the end of the array. Fixes: 6e973d2c4385 ('clk: vexpress: Add separate SP810 driver') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: Remove clk.h and clkdev.h includesStephen Boyd2015-07-205-7/+5
| | | | | | | | | | | Clock provider drivers generally shouldn't include clk.h because it's the consumer API. Remove the include here because this is a provider driver. Also remove clkdev.h in files that aren't using it and replace them with slab.h in files that were relying on the implicit include of slab.h in clkdev.h. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: Silence sparse warningsStephen Boyd2015-05-141-2/+2
| | | | | | | | | | | | | drivers/clk/versatile/clk-sp810.c:159:29: error: incompatible types for operation (<=) drivers/clk/versatile/clk-sp810.c:159:29: left side has type char const *<noident> drivers/clk/versatile/clk-sp810.c:159:29: right side has type int drivers/clk/versatile/clk-sp810.c:159:53: error: incompatible types for operation (<=) drivers/clk/versatile/clk-sp810.c:159:53: left side has type char const *<noident> drivers/clk/versatile/clk-sp810.c:159:53: right side has type int drivers/clk/versatile/clk-sp810.c:138:13: warning: symbol 'clk_sp810_of_setup' was not declared. Should it be static? Acked: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: versatile: test returned valueJulia Lawall2015-04-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Put NULL test on the result of the previous call instead on one of its arguments. A simplified version of the semantic match that finds this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> r@ expression *e1; expression *e2; identifier f; statement S1,S2; @@ e1 = f(...,e2,...); ( if (e1 == NULL || ...) S1 else S2 | *if (e2 == NULL || ...) S1 else S2 ) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* clk: constify of_device_id arrayFabian Frederick2015-04-011-1/+1
| | | | | | | | | | | of_device_id is always used as const. (See driver.of_match_table and open firmware functions) __initdata updated to __initconst for static const struct of_device_id ti_clkdm_match_table[] Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* ARM: vexpress: Remove non-DT codePawel Moll2014-11-283-94/+0
| | | | | | | | | | | | | Now, with the CLCD DT support available, there is no more reason to keep the non-DT support for V2P-CA9. Removed, together with "some" supporting code. It was necessary to make PLAT_VERSATILE_SCHED_CLOCK optional and selected by the machines still interested in it. Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* clk: versatile: add versatile OSC supportRob Herring2014-06-242-5/+36
| | | | | | | | | | | | | Versatile platforms share the same OSC programming model as Integrator platforms. Add the necessary parameters and init functions for Versatile. Renaming the file to clk-versatile.c as versatile is used as the family name for ARM, Ltd. boards. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Mike Turquette <mturquette@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
* Merge tag 'clk-for-linus-3.16' of ↵Linus Torvalds2014-06-072-7/+33
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/mike.turquette/linux into next Pull clock framework updates from Mike Turquette: "The clock framework changes for 3.16 are pretty typical: mostly clock driver additions and fixes. There are additions to the clock core code for some of the basic types (e.g. the common divider type has some fixes and featured added to it). One minor annoyance is a last-minute dependency that wasn't handled quite right. Commit ba0fae3b06a6 ("clk: berlin: add core clock driver for BG2/BG2CD") in this pull request depends on include/dt-bindings/clock/berlin2.h, which is already in your tree via the arm-soc pull request. Building for the berlin platform will break when the clk tree is built on it's own, but merged into your master branch everything should be fine" * tag 'clk-for-linus-3.16' of git://git.linaro.org/people/mike.turquette/linux: (75 commits) mmc: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs clk: export __clk_round_rate for providers clk: versatile: free icst on error return clk: qcom: Return error pointers for unimplemented clocks clk: qcom: Support msm8974pro global clock control hardware clk: qcom: Properly support display clocks on msm8974 clk: qcom: Support display RCG clocks clk: qcom: Return highest rate when round_rate() exceeds plan clk: qcom: Fix mmcc-8974's PLL configurations clk: qcom: Fix clk_rcg2_is_enabled() check clk: berlin: add core clock driver for BG2Q clk: berlin: add core clock driver for BG2/BG2CD clk: berlin: add driver for BG2x complex divider cells clk: berlin: add driver for BG2x simple PLLs clk: berlin: add driver for BG2x audio/video PLL clk: st: Terminate of match table clk/exynos4: Fix compilation warning ARM: shmobile: r8a7779: Add clock index macros for DT sources clk: divider: Fix overflow in clk_divider_bestdiv clk: u300: Terminate of match table ...
| * clk: versatile: free icst on error returnColin Ian King2014-05-301-0/+1
| | | | | | | | | | | | | | | | | | commit a183da63 introduced a new error return path that does not kfree icst if the kmemdup of desc->params fails. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
| * Merge remote-tracking branch 'linaro/clk-next' into clk-nextMike Turquette2014-05-232-7/+32
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| | * clk: impd1: add pclk clocksLinus Walleij2014-05-211-7/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The IM-PD1 PrimeCells all have pclk assignments though this clock cannot be controlled, and we need to provide this as a dummy clock for the PL061 GPIO driver to probe, so let's assign it to all the cells on the board. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
| | * clk/versatile: export symbols for impd1Arnd Bergmann2014-05-142-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The impd1 code on mach-integrator can be a loadable module, so we have to export icst_clk_register, integrator_impd1_clk_init and integrator_impd1_clk_exit. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
* | | clk: versatile: Split config options for sp810 and vexpress_oscPawel Moll2014-05-152-2/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the Kconfig entry for Versatile (& Express) clock drivers into a separate file and add individual options for sp810 and vexpress_osc drivers, as they are optional in some configurations and may have separate dependencies. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Mike Turquette <mturquette@linaro.org>
* | | mfd: vexpress: Convert custom func API to regmapPawel Moll2014-05-151-54/+42
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Components of the Versatile Express platform (configuration microcontrollers on motherboard and daughterboards in particular) talk to each other over a custom configuration bus. They provide miscellaneous functions (from clock generator control to energy sensors) which are represented as platform devices (and Device Tree nodes). The transactions on the bus can be generated by different "bridges" in the system, some of which are universal for the whole platform (for the price of high transfer latencies), others restricted to a subsystem (but much faster). Until now drivers for such functions were using custom "func" API, which is being replaced in this patch by regmap calls. This required: * a rework (and move to drivers/bus directory, as suggested by Samuel and Arnd) of the config bus core, which is much simpler now and uses device model infrastructure (class) to keep track of the bridges; non-DT case (soon to be retired anyway) is simply covered by a special device registration function * the new config-bus driver also takes over device population, so there is no need for special matching table for of_platform_populate nor "simple-bus" hack in the arm64 model dtsi file (relevant bindings documentation has been updated); this allows all the vexpress devices fit into normal device model, making it possible to remove plenty of early inits and other hacks in the near future * adaptation of the syscfg bridge implementation in the sysreg driver, again making it much simpler; there is a special case of the "energy" function spanning two registers, where they should be both defined in the tree now, but backward compatibility is maintained in the code * modification of the relevant drivers: * hwmon - just a straight-forward API change * power/reset driver - API change * regulator - API change plus error handling simplification * osc clock driver - this one required larger rework in order to turn in into a standard platform driver Signed-off-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Mark Brown <broonie@linaro.org> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Mike Turquette <mturquette@linaro.org>
* | vexpress: Initialise the sysregs before setting up the clocksCatalin Marinas2014-05-041-0/+2
|/ | | | | | | | | | | | | | | | Following arm64 commit bc3ee18a7a57 (arm64: init: Move of_clk_init to time_init()), vexpress_osc_of_setup() is called via of_clk_init() long before initcalls are issued. Initialising the vexpress oscillators requires the vespress sysregs to be already initialised, so this patch adds an explicit call to vexpress_sysreg_of_early_init() in vexpress oscillator setup function. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Will Deacon <will.deacon@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Tested-by: Pawel Moll <pawel.moll@arm.com> Acked-by: Pawel Moll <pawel.moll@arm.com> Cc: Mike Turquette <mturquette@linaro.org>
* clk: vexpress: NULL dereference on error pathDan Carpenter2014-04-241-1/+1
| | | | | | | | | If the allocation fails then we dereference the NULL in the error path. Just return directly. Fixes: ed27ff1db869 ('clk: Versatile Express clock generators ("osc") driver') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
* ARM: integrator: localize the impd1.h headerLinus Walleij2014-02-261-2/+4
| | | | | | | | | | | | | As we move toward multiplatform support for the Integrator family we need to localize all <mach/*> headers. This moves the impd1.h header down to the machine folder, copying the the three defines only used by the clock driver down into the clock driver. Cc: Will Deacon <will.deacon@arm.com> Cc: Jonathan Austin <jonathan.austin@arm.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* clk: versatile: respect parent rate in ICST clockLinus Walleij2014-02-132-5/+16
| | | | | | | | | | | | | | If the ICST clock has a parent, respect the rate of the parent when calculating the clock frequency. As this involves modifying the ICST parameter struct, make a cloned copy (the divisor arrays should be safe) so we can update the .ref field. Do not define the reference clock on the Integrator as we have the reference clock from the device tree. Keep it everywhere else. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* clk: versatile: pass a parent to the ICST clockLinus Walleij2014-02-135-5/+11
| | | | | | | | | As we want to actually define the parent frequency in the device tree for the ICST clocks, modify the clock registration function to take a parent argument. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* ARM: integrator: switch to fetch clocks from device treeLinus Walleij2014-02-131-48/+32
| | | | | | | | | | | | | | This atomic commit changes the Integrator clock implementation and the machines to register clocks from the device tree and use these instead of the previous hard-coded clocks. In the clock implementation all hard-coded clocks and the special initialization function call goes away, and is replaced by two compatible strings for the two clocks available on the core module. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* Merge tag 'clk-for-linus-3.14-part1' of ↵Linus Torvalds2014-01-231-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/mike.turquette/linux Pull clk framework changes from Mike Turquette: "The first half of the clk framework pull request is made up almost entirely of new platform/driver support. There are some conversions of existing drivers to the common-clock Device Tree binding, and a few non-critical fixes to the framework. Due to an entirely unnecessary cyclical dependency with the arm-soc tree this pull request is broken into two pieces. The second piece will be sent out after arm-soc sends you the pull request that merged in core support for the HiSilicon 3620 platform. That same pull request from arm-soc depends on this pull request to merge in those HiSilicon bits without causing build failures" [ Just did the ARM SoC merges, so getting ready for the second clk tree pull request - Linus ] * tag 'clk-for-linus-3.14-part1' of git://git.linaro.org/people/mike.turquette/linux: (97 commits) devicetree: bindings: Document qcom,mmcc devicetree: bindings: Document qcom,gcc clk: qcom: Add support for MSM8660's global clock controller (GCC) clk: qcom: Add support for MSM8974's multimedia clock controller (MMCC) clk: qcom: Add support for MSM8974's global clock controller (GCC) clk: qcom: Add support for MSM8960's multimedia clock controller (MMCC) clk: qcom: Add support for MSM8960's global clock controller (GCC) clk: qcom: Add reset controller support clk: qcom: Add support for branches/gate clocks clk: qcom: Add support for root clock generators (RCGs) clk: qcom: Add support for phase locked loops (PLLs) clk: qcom: Add a regmap type clock struct clk: Add set_rate_and_parent() op reset: Silence warning in reset-controller.h clk: sirf: re-arch to make the codes support both prima2 and atlas6 clk: composite: pass mux_hw into determine_rate clk: shmobile: Fix MSTP clock array initialization clk: shmobile: Fix MSTP clock index ARM: dts: Add clock provider specific properties to max77686 node clk: max77686: Register OF clock provider ...
| * clk: versatile: Staticize clk_sp810_timerclken_of_getSachin Kamat2013-12-191-1/+1
| | | | | | | | | | | | | | clk_sp810_timerclken_of_get is used only in this file. Make it static. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
* | clk: versatile: fixup IM-PD1 clock implementationLinus Walleij2014-01-031-15/+71
| | | | | | | | | | | | | | | | | | | | | | | | | | Register both VCO clocks, give per-logical module unique names to the clocks so we can have several IM-PD1's connected (in theory). Implement all the fixed-factor clocks as children of VCO2. Tested by using the UARTs and the PL181 MMC block on the IM-PD1, works flawlessly. Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | clk: versatile: pass a name to ICST clock providerLinus Walleij2014-01-035-6/+10
|/ | | | | | | | | When we have more than one of these clocks in a system (such as on the IM-PD1) we need a mechanism to pass a name for the clock. Refactor to add this as an argument. Acked-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* clk: fixup argument order when setting VCO parametersJonathan Austin2013-10-071-1/+1
| | | | | | | | | | | | | | The order of arguments in the call to vco_set() for the ICST clocks appears to have been switched in error, which results in the VCO not being initialised correctly. This in turn stops the integrated LCD on things like Integrator/CP from working correctly. This patch fixes the order and restores the expected functionality. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org> Cc: stable@vger.kernel.org
* clk: add CLK_SET_RATE_NO_REPARENT flagJames Hogan2013-08-191-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a CLK_SET_RATE_NO_REPARENT clock flag, which will prevent muxes being reparented during clk_set_rate. To avoid breaking existing platforms, all callers of clk_register_mux() are adjusted to pass the new flag. Platform maintainers are encouraged to remove the flag if they wish to allow mux reparenting on set_rate. Signed-off-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Viresh Kumar <viresh.linux@gmail.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Haojian Zhuang <haojian.zhuang@linaro.org> Cc: Chao Xie <xiechao.mail@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Emilio López" <emilio@elopez.com.ar> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Prashant Gaikwad <pgaikwad@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Peter De Schrijver <pdeschrijver@nvidia.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Chew <achew@nvidia.com> Cc: Doug Anderson <dianders@chromium.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Paul Walmsley <pwalmsley@nvidia.com> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Thomas Abraham <thomas.abraham@linaro.org> Cc: Tomasz Figa <t.figa@samsung.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: spear-devel@list.st.com Cc: linux-tegra@vger.kernel.org Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> [tegra] Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> [sunxi] Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> [Zynq] Signed-off-by: Mike Turquette <mturquette@linaro.org>
* clk: vexpress: Use full node name to identify individual clocksPawel Moll2013-06-201-2/+2
| | | | | | | | Previously all the clocks were reported as "osc". Now it will be something like "/dcc/osc@0". Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
* clk: vexpress: Add separate SP810 driverPawel Moll2013-04-183-50/+189
| | | | | | | | | | | | | | | Factor out the SP810 clocking code into a separate driver, selecting better (faster) parent at clk_prepare() time. This is to avoid problems with clocking infrastructure initialisation order, in particular to avoid dependency of fixed clock being initialized before SP810. It also makes vexpress platform OF-based clock initialisation code unnecessary. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Tested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Mike Turquette <mturquette@linaro.org> [mturquette@linaro.org: add .unprepare, FIXME comment, cleaned up code]
* Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds2013-02-211-2/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ARM SoC driver specific changes from Arnd Bergmann: - Updates to the ux500 cpufreq code - Moving the u300 DMA controller driver to drivers/dma - Moving versatile express drivers out of arch/arm for sharing with arch/arm64 - Device tree bindings for the OMAP General Purpose Memory Controller * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (27 commits) ARM: OMAP2+: gpmc: Add device tree documentation for elm handle ARM: OMAP2+: gpmc: add DT bindings for OneNAND ARM: OMAP2+: gpmc-onenand: drop __init annotation mtd: omap-onenand: pass device_node in platform data ARM: OMAP2+: Prevent potential crash if GPMC probe fails ARM: OMAP2+: gpmc: Remove unneeded of_node_put() arm: Move sp810.h to include/linux/amba/ ARM: OMAP: gpmc: add DT bindings for GPMC timings and NAND ARM: OMAP: gpmc: enable hwecc for AM33xx SoCs ARM: OMAP: gpmc-nand: drop __init annotation mtd: omap-nand: pass device_node in platform data ARM: OMAP: gpmc: don't create devices from initcall on DT dma: coh901318: cut down on platform data abstraction dma: coh901318: merge header files dma: coh901318: push definitions into driver dma: coh901318: push header down into the DMA subsystem dma: coh901318: skip hard-coded addresses dma: coh901318: remove hardcoded target addresses dma: coh901318: push platform data into driver dma: coh901318: create a proper platform data file ...
| * arm: Move sp810.h to include/linux/amba/Catalin Marinas2013-01-301-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Since it is now used by code under drivers/clk/ it makes sense for this file to be in a more generic location. This is required for building vexpress support on arm64. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Pawel Moll <pawel.moll@arm.com> Cc: Shiraz Hashim <shiraz.hashim@st.com> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
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