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Since pxa clocks were ported to the clock framework, an ordering issue
appears between clocks and clocksource initialization. As a consequence,
the pxa timer clock cannot be acquired in pxa_timer, and is disabled by
clock framework because it is "unused".
The ordering issue is that in the kernel boot sequence :
start_kernel()
...
time_init()
-> pxa_timer()
-> here the clocksource is initialized
...
rest_init()
kernel_init()
initcalls
-> here the clocks are initialized
In the current sequence, the clocks are initialized way after pxa_timer,
which cannot acquire the OSTIMER0 clock.
To solve this issue, the clocks initialization is moved to pxa_timer(),
so that clocks are initialized before clocksource for non device-tree.
For device-tree, the standard arm time_init() will take care of the
ordering.
Reviewed-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
When registering clk-si5351 by platform_data, we should not pass struct clk
for the reference clocks. Drop struct clk from platform_data and rework the
driver to use devm_clk_get of named clock references.
While at it, check for at least one valid input clock and properly prepare/
enable valid reference clocks.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Reported-by: Michael Welling <mwelling@ieee.org>
Reported-by: Jean-Francois Moine <moinejf@free.fr>
Reported-by: Russell King <rmk+linux@arm.linux.org.uk>
Tested-by: Michael Welling <mwelling@ieee.org>
Tested-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
We don't check to make sure the enable_lock is held across
enable/disable and we don't check if the prepare_lock is held
across prepare/unprepare. Add some asserts to catch any future
locking problems.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The APEATCLK and APETRACECLK are actually scaleable so register
them as scaleable clocks.
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
clk_dump() will dump data about all clocks in JSON
format, but it misses a newline character at the
end of the JSON string. This patch adds that missing
newline character.
Signed-off-by: Felipe Balbi <balbi@ti.com>
[sboyd@codeaurora.org: Squelch checkpatch with seq_puts()]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Before commit 035a61c314eb ("clk: Make clk API return per-user
struct clk instances") we acquired the enable_lock in
__clk_set_parent_{before,after}() by means of calling
clk_enable(). After commit 035a61c314eb we use clk_core_enable()
in place of the clk_enable(), and clk_core_enable() doesn't
acquire the enable_lock. This opens up a race condition between
clk_set_parent() and clk_enable(). Fix it.
Fixes: 035a61c314eb ("clk: Make clk API return per-user struct clk instances")
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Dong Aisheng <aisheng.dong@freescale.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
clkdev_create() is a shorter way to write clkdev_alloc() followed by
clkdev_add(). Use this instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add a helper to allocate and add a clk_lookup structure. This can not
only be used in several places in clkdev.c to simplify the code, but
more importantly, can be used by callers of the clkdev code to simplify
their clkdev creation and registration.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The connection id is only passed to clk_get() which is already const.
Const-ify this argument too.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
We want to be able to call clkdev_add_table() from non-init code, so we
need to drop the __init marker from it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
clk_add_alias() calls clk_get() followed by clk_put() but in between
those two calls it saves away the struct clk pointer to a clk_lookup
structure. This leaves the 'clk' member of the clk_lookup pointing at
freed memory on configurations where CONFIG_COMMON_CLK=y. This is a
problem because clk_get_sys() will eventually try to dereference the
freed pointer by calling __clk_get_hw() on it. Fix this by saving away
the struct clk_hw pointer instead of the struct clk pointer so that when
we try to create a per-user struct clk in clk_get_sys() we don't
dereference a junk pointer.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Staticize symbols not exported and not used outside of file.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Replace duplicated const keyword with proper array of const pointers to
const strings.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The array of parent names can be made as array of const pointers to
const strings.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The array of parent names can be made as array of const pointers to
const strings.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Add missing static to local (file-scope only) symbols.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Add missing static to local (file-scope only) symbols.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch adds basic clocks for MT8173, including TOPCKGEN, PLLs,
INFRA and PERI clocks.
Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch adds basic clocks for MT8135, including TOPCKGEN, PLLs,
INFRA and PERI clocks.
Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The pericfg and infracfg units also provide reset lines to several
other SoC internal units. This adds a function which can be called
from the pericfg and infracfg initialization functions which will
register the reset controller using reset_controller_register. The
reset controller will provide support for resetting the units
connected to the pericfg and infracfg controller. The units resetted
by this controller can use the standard reset device tree binding
to gain access to the reset lines.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch adds common clock support for Mediatek SoCs, including plls,
muxes and clock gates.
Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[sboyd@codeaurora.org: Squelch checkpatch warning in clk-mtk.h]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The clk functions and structs declare the parent_name arrays as
'const char **parent_names' which means the parent name strings
are const, but the array itself is not. Use
'const char * const * parent_names' instead which also makes
the array const. This allows us to put the parent_name arrays into
the __initconst section.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[sboyd@codeaurora.org: Squelch 80-character checkpatch warnings]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
of_io_request_and map returns an error pointer, but the current code assumes
that on error the returned pointer will be NULL.
Obviously, that makes the check completely useless. Change the test to actually
check for the proper error code.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-clk@vger.kernel.org
Commit ae43b3289186 ("ARM: 8202/1: dmaengine: pl330: Add runtime Power
Management support v12") added pm support for the pl330 dma driver but
it makes the clock for the Exynos5420 MDMA0 DMA controller to be gated
during suspend and this in turn makes its parent clock aclk266_g2d to
be gated. But the clock needs to be ungated prior suspend to allow the
system to be suspend and resumed correctly.
Add GATE_BUS_TOP register to the list of registers to be restored when
the system enters into a suspend state so aclk266_g2d will be ungated.
Thanks to Abhilash Kesavan for figuring out that this was the issue.
Fixes: ae43b32 ("ARM: 8202/1: dmaengine: pl330: Add runtime Power Management support v12")
Cc: stable@vger.kernel.org # 3.19+
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
The irq_domain_ops are not modified by the driver and the irqdomain core
code accepts pointer to a const data.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
key/value pairs in a JSON object must be separated by a comma.
After adding the properties "accuracy" and "phase" the JSON output
of /sys/kernel/debug/clk/clk_dump is invalid.
So add the missing commas to fix it.
Fixes: 5279fc402ae5 ("clk: add clk accuracy retrieval support")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
[sboyd@codeaurora.org: Added comment in function]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The gfx3d_clk_src parents configuration is incorrect. Fix it.
Fixes: 3966fab8b6ab "clk: qcom: Add MSM8916 Global Clock Controller support"
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
One of the video codec clock frequencies has incorrect divider
value. Fix it.
Fixes: 3966fab8b6ab "clk: qcom: Add MSM8916 Global Clock Controller support"
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The debugfs clk directory no longer expresses a clk tree. Update
the comments around that apporiately. Also drop comments about
prepare locks needing to be held as we have the proper
annotations with lockdep_assert_held().
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Move the code around so that we don't need to declare function
prototypes at the start of the file. Simplify
clk_core_is_prepared() and clk_core_is_enabled() too to make the
diff easier to read.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This condition can't ever be true because this function is static
and it's always called with a non-NULL pointer.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
We don't need to print error messages when allocations fail.
We'll get a nice backtrace in such situations anyway.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
These functions are only used in one place. Let's squash them
into their respective callers to save some lines.
Signed-off-by: Dong Aisheng <aisheng.dong@freescale.com>
[sboyd@codeaurora.org: Redo commit text, add NULL check in
clk_enable()]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
While introducing struct clk_core we tried to minimize the diff
by changing the type of 'clk' variables from struct clk to struct
clk_core without changing the names of the variables. Now that
the split is complete, the code is slightly confusing when it
mixes variables called 'clk' and variables called 'core' that are
of the same type struct clk_core. Let's be consistent and use
'core' everywhere we have a struct clk_core pointer and 'clk'
when we have a struct clk pointer.
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch fixes the wrong parent clock of sclk_apollo clock
from 'div_apollo_pll' to 'div_apollo2'.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
CLK_PCLK_MONOTONIC_CNT clock had a wrong register assigned to it.
The correct register is ENABLE_PCLK_MIF_SECURE_MONOTONIC_CNT.
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
This patch removes the CONFIG_ARCH_EXYNOS5433 and then use only the
CONFIG_ARCH_EXYNOS for ARM-64bit Exynos5433 SoC.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
The changes here belong to two main platforms:
- Atmel At91 is flipping the bit and going multiplatform. This includes some
cleanups and removal of code, and the final flip of config dependencies
- Shmobile has several platforms that are going multiplatform, but this
branch also contains a bunch of cleanups that they weren't able to keep
separate in a good way. THere's also a removal of one of their SoCs and the
corresponding boards (sh7372 and mackerel).
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Merge tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC multiplatform code changes from Olof Johansson:
"The changes here belong to two main platforms:
- Atmel At91 is flipping the bit and going multiplatform. This
includes some cleanups and removal of code, and the final flip of
config dependencies
- Shmobile has several platforms that are going multiplatform, but
this branch also contains a bunch of cleanups that they weren't
able to keep separate in a good way. THere's also a removal of one
of their SoCs and the corresponding boards (sh7372 and mackerel)"
* tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits)
ARM: at91/pm: move AT91_MEMCTRL_* to pm.h
ARM: at91/pm: move the standby functions to pm.c
ARM: at91: fix pm_suspend.S compilation when ARMv6 is selected
ARM: at91: add a Kconfig dependency on multi-platform
ARM: at91: drop AT91_TIMER_HZ
ARM: at91: remove hardware.h
ARM: at91: remove SoC headers
ARM: at91: remove useless mach/cpu.h
ARM: at91: remove unused headers
ARM: at91: switch at91_dt_defconfig to multiplatform
ARM: at91: switch to multiplatform
ARM: shmobile: r8a7778: enable multiplatform target
ARM: shmobile: bockw: add sound to DT
ARM: shmobile: r8a7778: add sound to DT
ARM: shmobile: bockw: add devices hooked up to i2c0 to DT
DT: i2c: add trivial binding for OKI ML86V7667 video decoder
ARM: shmobile: r8a7778: common clock framework CPG driver
ARM: shmobile: bockw dts: set extal clock frequency
ARM: shmobile: bockw dts: Move Ethernet node to BSC
ARM: shmobile: r8a73a4: Remove legacy code
...
drivers and updates to existing ones for feature enhancements and bug
fixes. There is more churn than usual in the framework core due to the
change to introduce per-user unique struct clk pointers in 4.0. This
caused several regressions to surface, some of which were sent as fixes
to 4.0. New generic clock drivers were added for GPIO- and PWM-based
clock controllers. Additionally the common clk-divider code recieved
several fixes to the way it rounds rates.
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Merge tag 'clk-for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clock framework updates from Michael Turquette:
"The changes to the common clock framework for 4.0 are mostly new clock
drivers and updates to existing ones for feature enhancements and bug
fixes.
There is more churn than usual in the framework core due to the change
to introduce per-user unique struct clk pointers in 4.0. This caused
several regressions to surface, some of which were sent as fixes to
4.0. New generic clock drivers were added for GPIO- and PWM-based
clock controllers.
Additionally the common clk-divider code recieved several fixes to the
way it rounds rates"
* tag 'clk-for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (91 commits)
clk: check ->determine/round_rate() return value in clk_calc_new_rates
clk: at91: usb: propagate rate modification to the parent clk
clk: samsung: exynos4: Disable ARMCLK down feature on Exynos4210 SoC
clk: don't use __initconst for non-const arrays
clk: at91: change to using endian agnositc IO
clk: clk-gpio-gate: Fix active low
clk: Add PWM clock driver
clk: Add clock driver for mb86s7x
clk: pxa: pxa3xx: add missing os timer clock
clk: tegra: Use the proper parent for plld_dsi
clk: tegra: Use generic tegra_osc_clk_init() on Tegra114
clk: tegra: Model oscillator as clock
clk: tegra: Add peripheral registers for bank Y
clk: tegra: Register the proper number of resets
clk: tegra: Remove needless initializations
clk: tegra: Use consistent indentation
clk: tegra: Various whitespace cleanups
clk: tegra: Enable HDA to HDMI clocks on Tegra124
clk: tegra: Fix a bunch of sparse warnings
clk: tegra: Fix typo tabel -> table
...
Pull MIPS updates from Ralf Baechle:
"This is the main pull request for MIPS for Linux 4.1. Most
noteworthy:
- Add more Octeon-optimized crypto functions
- Octeon crypto preemption and locking fixes
- Little endian support for Octeon
- Use correct CSR to soft reset Octeons
- Support LEDs on the Octeon-based DSR-1000N
- Fix PCI interrupt mapping for the Octeon-based DSR-1000N
- Mark prom_free_prom_memory() as __init for a number of systems
- Support for Imagination's Pistachio SOC. This includes arch and
CLK bits. I'd like to merge pinctrl bits later
- Improve parallelism of csum_partial for certain pipelines
- Organize DTB files in subdirs like other architectures
- Implement read_sched_clock for all MIPS platforms other than
Octeon
- Massive series of 38 fixes and cleanups for the FPU emulator /
kernel
- Further FPU remulator work to support new features. This sits on a
separate branch which also has been pulled into the 4.1 KVM branch
- Clean up and fixes for the SEAD3 eval board; remove unused file
- Various updates for Netlogic platforms
- A number of small updates for Loongson 3 platforms
- Increase the memory limit for ATH79 platforms to 256MB
- A fair number of fixes and updates for BCM47xx platforms
- Finish the implementation of XPA support
- MIPS FDC support. No, not floppy controller but Fast Debug Channel :)
- Detect the R16000 used in SGI legacy platforms
- Fix Kconfig dependencies for the SSB bus support"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (265 commits)
MIPS: Makefile: Fix MIPS ASE detection code
MIPS: asm: elf: Set O32 default FPU flags
MIPS: BCM47XX: Fix detecting Microsoft MN-700 & Asus WL500G
MIPS: Kconfig: Disable SMP/CPS for 64-bit
MIPS: Hibernate: flush TLB entries earlier
MIPS: smp-cps: cpu_set FPU mask if FPU present
MIPS: lose_fpu(): Disable FPU when MSA enabled
MIPS: ralink: add missing symbol for RALINK_ILL_ACC
MIPS: ralink: Fix bad config symbol in PCI makefile.
SSB: fix Kconfig dependencies
MIPS: Malta: Detect and fix bad memsize values
Revert "MIPS: Avoid pipeline stalls on some MIPS32R2 cores."
MIPS: Octeon: Delete override of cpu_has_mips_r2_exec_hazard.
MIPS: Fix cpu_has_mips_r2_exec_hazard.
MIPS: kernel: entry.S: Set correct ISA level for mips_ihb
MIPS: asm: spinlock: Fix addiu instruction for R10000_LLSC_WAR case
MIPS: r4kcache: Use correct base register for MIPS R6 cache flushes
MIPS: Kconfig: Fix typo for the r2-to-r6 emulator kernel parameter
MIPS: unaligned: Fix regular load/store instruction emulation for EVA
MIPS: unaligned: Surround load/store macros in do {} while statements
...
Now that the kernel provides DIV_ROUND_CLOSEST_ULL(), drop the internal
implementation and use the kernel one.
Signed-off-by: Javi Merino <javi.merino@arm.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Alex Elder <elder@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
->determine_rate() and ->round_rate() can return the closest rate to the
requested one or an error code.
clk_calc_new_rates is assuming these functions can't return a negative
value, which leads to a undefined behavior when the clk implementation
returns such an error code.
Fix this by returning NULL in case ->determine_rate() or ->round_rate()
returned an error code.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
The at91sam9n12 and at91sam9x5 usb clocks do not propagate rate
modification requests to their parents.
This causes a bug when the PLLB is left uninitialized by the bootloader
(PLL multiplier set to 0, or in other words, PLL rate = 0 Hz).
Implement the determinate_rate method and propagate the change rate
request to the parent clk.
Cc: <stable@vger.kernel.org> # v3.14+
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Bo Shen <voice.shen@atmel.com>
Tested-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
