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I didn't notice this when merging the thermal code from Zhang, but his
merge (commit 5a924a07f882: "Merge branches 'thermal-core' and
'thermal-intel' of .git into next") of the thermal-core and
thermal-intel branches was wrong.
In thermal-core, commit 17e8351a7739 ("thermal: consistently use int for
temperatures") converted the thermal layer to use "int" for
temperatures.
But in parallel, in the thermal-intel branch commit d0a12625d2ff
("thermal: Add Intel PCH thermal driver") added support for the intel
PCH thermal sensor using the old interfaces that used "unsigned long"
pointers.
This resulted in warnings like this:
drivers/thermal/intel_pch_thermal.c:184:14: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
.get_temp = pch_thermal_get_temp,
^
drivers/thermal/intel_pch_thermal.c:184:14: note: (near initialization for ‘tzd_ops.get_temp’)
drivers/thermal/intel_pch_thermal.c:186:19: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]
.get_trip_temp = pch_get_trip_temp,
^
drivers/thermal/intel_pch_thermal.c:186:19: note: (near initialization for ‘tzd_ops.get_trip_temp’)
This fixes it.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal updates from Zhang Rui:
- use int instead of unsigned long to represent temperature to avoid
bogus overheat detection when negative temperature reported. From
Sascha Hauer.
- export available thermal governors information to user space via
sysfs. From Wei Ni.
- introduce new thermal driver for Wildcat Point platform controller
hub, which uses PCH thermal sensor and associated critical and hot
trip points. From Tushar Dave.
- add suuport for Intel Skylake and Denlow platforms in powerclamp
driver.
- some small cleanups in thermal core.
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal: Add Intel PCH thermal driver
thermal: Add comment explaining test for critical temperature
thermal: Use IS_ENABLED instead of #ifdef
thermal: remove unnecessary call to thermal_zone_device_set_polling
thermal: trivial: fix typo in comment
thermal: consistently use int for temperatures
thermal: add available policies sysfs attribute
thermal/powerclamp: add cpu id for denlow platform
thermal/powerclamp: add cpu id for Skylake u/y
thermal/powerclamp: add cpu id for skylake h/s
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This change adds a thermal driver for Wildcat Point platform controller
hub. This driver register PCH thermal sensor as a thermal zone and
associate critical and hot trips if present.
Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Reviewed-by: Pandruvada, Srinivas <srinivas.pandruvada@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Add support for Intel Denlow UP server platform.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Add support for Intel Skylake u/y
Signed-off-by: Radivoje Jovanovic <radivoje.jovanovic@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Add support for Intel Skylake H/S
Signed-off-by: Radivoje Jovanovic <radivoje.jovanovic@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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The code testing if a temperature should be emulated or not is
not obvious. Add a comment explaining why this test is done.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Use IS_ENABLED(CONFIG_THERMAL_EMULATION) to make the code more readable
and to get rid of the addtional #ifdef around the variable definitions
in thermal_zone_get_temp().
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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When the thermal zone has no get_temp callback then thermal_zone_device_register()
calls thermal_zone_device_set_polling() with a polling delay of 0. This
only cancels the poll_queue. Since the poll_queue hasn't been scheduled this
is a no-op. Remove it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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The thermal code uses int, long and unsigned long for temperatures
in different places.
Using an unsigned type limits the thermal framework to positive
temperatures without need. Also several drivers currently will report
temperatures near UINT_MAX for temperatures below 0°C. This will probably
immediately shut the machine down due to overtemperature if started below
0°C.
'long' is 64bit on several architectures. This is not needed since INT_MAX °mC
is above the melting point of all known materials.
Consistently use a plain 'int' for temperatures throughout the thermal code and
the drivers. This only changes the places in the drivers where the temperature
is passed around as pointer, when drivers internally use another type this is
not changed.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Peter Feuerer <peter@piie.net>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Jean Delvare <jdelvare@suse.de>
Cc: Peter Feuerer <peter@piie.net>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: linux-acpi@vger.kernel.org
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: lm-sensors@lm-sensors.org
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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The Linux thermal framework support to change thermal governor
policy in userspace, but it can't show what available policies
supported.
This patch adds available_policies attribute to the thermal
framework, it can list the thermal governors which can be
used for a particular zone. This attribute is read only.
Signed-off-by: Wei Ni <wni@nvidia.com>
Reviewed-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"This has been a busy release for regmap.
By far the biggest set of changes here are those from Markus Pargmann
which implement support for block transfers in smbus devices. This
required quite a bit of refactoring but leaves us better able to
handle odd restrictions that controllers may have and with better
performance on smbus.
Other new features include:
- Fix interactions with lockdep for nested regmaps (eg, when a device
using regmap is connected to a bus where the bus controller has a
separate regmap). Lockdep's default class identification is too
crude to work without help.
- Support for must write bitfield operations, useful for operations
which require writing a bit to trigger them from Kuniori Morimoto.
- Support for delaying during register patch application from Nariman
Poushin.
- Support for overriding cache state via the debugfs implementation
from Richard Fitzgerald"
* tag 'regmap-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (25 commits)
regmap: fix a NULL pointer dereference in __regmap_init
regmap: Support bulk reads for devices without raw formatting
regmap-i2c: Add smbus i2c block support
regmap: Add raw_write/read checks for max_raw_write/read sizes
regmap: regmap max_raw_read/write getter functions
regmap: Introduce max_raw_read/write for regmap_bulk_read/write
regmap: Add missing comments about struct regmap_bus
regmap: No multi_write support if bus->write does not exist
regmap: Split use_single_rw internally into use_single_read/write
regmap: Fix regmap_bulk_write for bus writes
regmap: regmap_raw_read return error on !bus->read
regulator: core: Print at debug level on debugfs creation failure
regmap: Fix regmap_can_raw_write check
regmap: fix typos in regmap.c
regmap: Fix integertypes for register address and value
regmap: Move documentation to regmap.h
regmap: Use different lockdep class for each regmap init call
thermal: sti: Add parentheses around bridge->ops->regmap_init call
mfd: vexpress: Add parentheses around bridge->ops->regmap_init call
regmap: debugfs: Fix misuse of IS_ENABLED
...
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'regmap/topic/seq-delay' into regmap-next
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regmap_init(...) is a macro since commit
"regmap: Use different lockdep class for each regmap init call".
That same name is used as a function pointer: prevent its expansion
by adding parentheses around the function pointer.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm changes from Ingo Molnar:
"The biggest changes in this cycle were:
- Revamp, simplify (and in some cases fix) Time Stamp Counter (TSC)
primitives. (Andy Lutomirski)
- Add new, comprehensible entry and exit handlers written in C.
(Andy Lutomirski)
- vm86 mode cleanups and fixes. (Brian Gerst)
- 32-bit compat code cleanups. (Brian Gerst)
The amount of simplification in low level assembly code is already
palpable:
arch/x86/entry/entry_32.S | 130 +----
arch/x86/entry/entry_64.S | 197 ++-----
but more simplifications are planned.
There's also the usual laudry mix of low level changes - see the
changelog for details"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (83 commits)
x86/asm: Drop repeated macro of X86_EFLAGS_AC definition
x86/asm/msr: Make wrmsrl() a function
x86/asm/delay: Introduce an MWAITX-based delay with a configurable timer
x86/asm: Add MONITORX/MWAITX instruction support
x86/traps: Weaken context tracking entry assertions
x86/asm/tsc: Add rdtscll() merge helper
selftests/x86: Add syscall_nt selftest
selftests/x86: Disable sigreturn_64
x86/vdso: Emit a GNU hash
x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks
x86/entry/32: Migrate to C exit path
x86/entry/32: Remove 32-bit syscall audit optimizations
x86/vm86: Rename vm86->v86flags and v86mask
x86/vm86: Rename vm86->vm86_info to user_vm86
x86/vm86: Clean up vm86.h includes
x86/vm86: Move the vm86 IRQ definitions to vm86.h
x86/vm86: Use the normal pt_regs area for vm86
x86/vm86: Eliminate 'struct kernel_vm86_struct'
x86/vm86: Move fields from 'struct kernel_vm86_struct' to 'struct vm86'
x86/vm86: Move vm86 fields out of 'thread_struct'
...
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Conflicts:
arch/x86/entry/entry_64_compat.S
arch/x86/math-emu/get_address.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Now that there is no paravirt TSC, the "native" is
inappropriate. The function does RDTSC, so give it the obvious
name: rdtsc().
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/fd43e16281991f096c1e4d21574d9e1402c62d39.1434501121.git.luto@kernel.org
[ Ported it to v4.2-rc1. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Now that the ->read_tsc() paravirt hook is gone, rdtscll() is
just a wrapper around native_read_tsc(). Unwrap it.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/d2449ae62c1b1fb90195bcfb19ef4a35883a04dc.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Commit cf736ea6f902 ("thermal: power_allocator: do not use devm*
interfaces") forgot to change a devm_kcalloc() to just kcalloc(), but
it's corresponding devm_kfree() was changed to kfree(). Allocate with
kcalloc() to match the kfree().
Fixes: cf736ea6f902 ("thermal: power_allocator: do not use devm* interfaces")
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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policy->max is the maximum allowed frequency defined by user and
clipped_freq is the maximum that thermal constraints allow.
If clipped_freq is lower than policy->max, then we need to readjust
policy->max.
But, if clipped_freq is greater than policy->max, we don't need to do
anything. We used to call cpufreq_verify_within_limits() in this case,
but it doesn't change anything in this case.
Lets skip this unnecessary call and write a comment that explains this.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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That's what it is for, lets name it properly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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That's what it is for, lets name it properly.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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We just need to take care of single event here and there is no need to
increase indentation level of most of the code (which causes lines
longer that 80 columns to break).
Kill the switch block.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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If a valid cpufreq_dev is found for policy->cpu, we should update the
policy and quit the for loop. There is no need to keep traversing the
list of cpufreq_dev's.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Its always set before getting used, don't initialize it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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A recent change to the cpu_cooling code introduced a AB-BA deadlock
scenario between the cpufreq_policy_notifier_list rwsem and the
cooling_cpufreq_lock. This is caused by cooling_cpufreq_lock being held
before the registration/removal of the notifier block (an operation
which takes the rwsem), and the notifier code itself which takes the
locks in the reverse order:
======================================================
[ INFO: possible circular locking dependency detected ]
3.18.0+ #1453 Not tainted
-------------------------------------------------------
rc.local/770 is trying to acquire lock:
(cooling_cpufreq_lock){+.+.+.}, at: [<c04abfc4>] cpufreq_thermal_notifier+0x34/0xfc
but task is already holding lock:
((cpufreq_policy_notifier_list).rwsem){++++.+}, at: [<c0042f04>] __blocking_notifier_call_chain+0x34/0x68
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 ((cpufreq_policy_notifier_list).rwsem){++++.+}:
[<c06bc3b0>] down_write+0x44/0x9c
[<c0043444>] blocking_notifier_chain_register+0x28/0xd8
[<c04ad610>] cpufreq_register_notifier+0x68/0x90
[<c04abe4c>] __cpufreq_cooling_register.part.1+0x120/0x180
[<c04abf44>] __cpufreq_cooling_register+0x98/0xa4
[<c04abf8c>] cpufreq_cooling_register+0x18/0x1c
[<bf0046f8>] imx_thermal_probe+0x1c0/0x470 [imx_thermal]
[<c037cef8>] platform_drv_probe+0x50/0xac
[<c037b710>] driver_probe_device+0x114/0x234
[<c037b8cc>] __driver_attach+0x9c/0xa0
[<c0379d68>] bus_for_each_dev+0x5c/0x90
[<c037b204>] driver_attach+0x24/0x28
[<c037ae7c>] bus_add_driver+0xe0/0x1d8
[<c037c0cc>] driver_register+0x80/0xfc
[<c037cd80>] __platform_driver_register+0x50/0x64
[<bf007018>] 0xbf007018
[<c0008a5c>] do_one_initcall+0x88/0x1d8
[<c0095da4>] load_module+0x1768/0x1ef8
[<c0096614>] SyS_init_module+0xe0/0xf4
[<c000ec00>] ret_fast_syscall+0x0/0x48
-> #0 (cooling_cpufreq_lock){+.+.+.}:
[<c00619f8>] lock_acquire+0xb0/0x124
[<c06ba3b4>] mutex_lock_nested+0x5c/0x3d8
[<c04abfc4>] cpufreq_thermal_notifier+0x34/0xfc
[<c0042bf4>] notifier_call_chain+0x4c/0x8c
[<c0042f20>] __blocking_notifier_call_chain+0x50/0x68
[<c0042f58>] blocking_notifier_call_chain+0x20/0x28
[<c04ae62c>] cpufreq_set_policy+0x7c/0x1d0
[<c04af3cc>] store_scaling_governor+0x74/0x9c
[<c04ad418>] store+0x90/0xc0
[<c0175384>] sysfs_kf_write+0x54/0x58
[<c01746b4>] kernfs_fop_write+0xdc/0x190
[<c010dcc0>] vfs_write+0xac/0x1b4
[<c010dfec>] SyS_write+0x44/0x90
[<c000ec00>] ret_fast_syscall+0x0/0x48
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock((cpufreq_policy_notifier_list).rwsem);
lock(cooling_cpufreq_lock);
lock((cpufreq_policy_notifier_list).rwsem);
lock(cooling_cpufreq_lock);
*** DEADLOCK ***
7 locks held by rc.local/770:
#0: (sb_writers#6){.+.+.+}, at: [<c010dda0>] vfs_write+0x18c/0x1b4
#1: (&of->mutex){+.+.+.}, at: [<c0174678>] kernfs_fop_write+0xa0/0x190
#2: (s_active#52){.+.+.+}, at: [<c0174680>] kernfs_fop_write+0xa8/0x190
#3: (cpu_hotplug.lock){++++++}, at: [<c0026a60>] get_online_cpus+0x34/0x90
#4: (cpufreq_rwsem){.+.+.+}, at: [<c04ad3e0>] store+0x58/0xc0
#5: (&policy->rwsem){+.+.+.}, at: [<c04ad3f8>] store+0x70/0xc0
#6: ((cpufreq_policy_notifier_list).rwsem){++++.+}, at: [<c0042f04>] __blocking_notifier_call_chain+0x34/0x68
stack backtrace:
CPU: 0 PID: 770 Comm: rc.local Not tainted 3.18.0+ #1453
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Backtrace:
[<c00121c8>] (dump_backtrace) from [<c0012360>] (show_stack+0x18/0x1c)
r6:c0b85a80 r5:c0b75630 r4:00000000 r3:00000000
[<c0012348>] (show_stack) from [<c06b6c48>] (dump_stack+0x7c/0x98)
[<c06b6bcc>] (dump_stack) from [<c06b42a4>] (print_circular_bug+0x28c/0x2d8)
r4:c0b85a80 r3:d0071d40
[<c06b4018>] (print_circular_bug) from [<c00613b0>] (__lock_acquire+0x1acc/0x1bb0)
r10:c0b50660 r8:c09e6d80 r7:d0071d40 r6:c11d0f0c r5:00000007 r4:d0072240
[<c005f8e4>] (__lock_acquire) from [<c00619f8>] (lock_acquire+0xb0/0x124)
r10:00000000 r9:c04abfc4 r8:00000000 r7:00000000 r6:00000000 r5:c0a06f0c
r4:00000000
[<c0061948>] (lock_acquire) from [<c06ba3b4>] (mutex_lock_nested+0x5c/0x3d8)
r10:ec853800 r9:c0a06ed4 r8:d0071d40 r7:c0a06ed4 r6:c11d0f0c r5:00000000
r4:c04abfc4
[<c06ba358>] (mutex_lock_nested) from [<c04abfc4>] (cpufreq_thermal_notifier+0x34/0xfc)
r10:ec853800 r9:ec85380c r8:d00d7d3c r7:c0a06ed4 r6:d00d7d3c r5:00000000
r4:fffffffe
[<c04abf90>] (cpufreq_thermal_notifier) from [<c0042bf4>] (notifier_call_chain+0x4c/0x8c)
r7:00000000 r6:00000000 r5:00000000 r4:fffffffe
[<c0042ba8>] (notifier_call_chain) from [<c0042f20>] (__blocking_notifier_call_chain+0x50/0x68)
r8:c0a072a4 r7:00000000 r6:d00d7d3c r5:ffffffff r4:c0a06fc8 r3:ffffffff
[<c0042ed0>] (__blocking_notifier_call_chain) from [<c0042f58>] (blocking_notifier_call_chain+0x20/0x28)
r7:ec98b540 r6:c13ebc80 r5:ed76e600 r4:d00d7d3c
[<c0042f38>] (blocking_notifier_call_chain) from [<c04ae62c>] (cpufreq_set_policy+0x7c/0x1d0)
[<c04ae5b0>] (cpufreq_set_policy) from [<c04af3cc>] (store_scaling_governor+0x74/0x9c)
r7:ec98b540 r6:0000000c r5:ec98b540 r4:ed76e600
[<c04af358>] (store_scaling_governor) from [<c04ad418>] (store+0x90/0xc0)
r6:0000000c r5:ed76e6d4 r4:ed76e600
[<c04ad388>] (store) from [<c0175384>] (sysfs_kf_write+0x54/0x58)
r8:0000000c r7:d00d7f78 r6:ec98b540 r5:0000000c r4:ec853800 r3:0000000c
[<c0175330>] (sysfs_kf_write) from [<c01746b4>] (kernfs_fop_write+0xdc/0x190)
r6:ec98b540 r5:00000000 r4:00000000 r3:c0175330
[<c01745d8>] (kernfs_fop_write) from [<c010dcc0>] (vfs_write+0xac/0x1b4)
r10:0162aa70 r9:d00d6000 r8:0000000c r7:d00d7f78 r6:0162aa70 r5:0000000c
r4:eccde500
[<c010dc14>] (vfs_write) from [<c010dfec>] (SyS_write+0x44/0x90)
r10:0162aa70 r8:0000000c r7:eccde500 r6:eccde500 r5:00000000 r4:00000000
[<c010dfa8>] (SyS_write) from [<c000ec00>] (ret_fast_syscall+0x0/0x48)
r10:00000000 r8:c000edc4 r7:00000004 r6:000216cc r5:0000000c r4:0162aa70
Solve this by moving to finer grained locking - use one mutex to protect
the cpufreq_dev_list as a whole, and a separate lock to ensure correct
ordering of cpufreq notifier registration and removal.
cooling_list_lock is taken within cooling_cpufreq_lock on
(un)registration to preserve the behavior of the code, i.e. to
atomically add/remove to the list and (un)register the notifier.
Fixes: 2dcd851fe4b4 ("thermal: cpu_cooling: Update always cpufreq policy with
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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The code in question is called outside of standard driver
probe()/remove() callbacks and thus will not benefit from use of devm*
infrastructure.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into for-rc
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This patch removes the unused code related to struct exynos_tmu_platform_data
because exynos_tmu_probe() don't handle the struct exynos_tmu_platform_data *pdata.
Test HW: Exynos4412 - Trats2 board
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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The exynos thermal driver use the of_thermal_*() API to parse the basic data
for thermal management from devicetree file. So, if CONFIG_EXYNOS_THERMAL is
selected without CONFIG_THERMAL_OF, kernel can build it without any problem.
But, exynos thermal driver is not working with following error log. This patch
add the dependency of CONFIG_THERMAL_OF instead of CONFIG_OF.
[ 1.458644] get_th_reg: Cannot get trip points from of-thermal.c!
[ 1.459096] get_th_reg: Cannot get trip points from of-thermal.c!
[ 1.465211] exynos4412_tmu_initialize: No CRITICAL trip point defined at of-thermal.c!
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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During probe the regulator (if present) was enabled but not disabled in
case of failure. So an unsuccessful probe lead to enabling the
regulator which was actually not needed because the device was not
enabled.
Additionally each deferred probe lead to increase of regulator enable
count so it would not be effectively disabled during removal of the
device.
Test HW: Exynos4412 - Trats2 board
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 498d22f616f6 ("thermal: exynos: Support for TMU regulator defined at device tree")
Cc: <stable@vger.kernel.org>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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The power allocator governor uses ftrace to output a bunch of internal
data for debugging and tuning. Currently, the requested power it
outputs is the "weighted" requested power, that is, what each cooling
device has requested multiplied by the cooling device weight. It is
more useful to trace the real request, without any weight being
applied.
This commit only affects the data traced, there is no functional change.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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This file isn't getting removed while we unbind a device from thermal
zone. And this causes following messages when the device is registered
again:
WARNING: CPU: 0 PID: 2228 at /home/viresh/linux/fs/sysfs/dir.c:31 sysfs_warn_dup+0x60/0x70()
sysfs: cannot create duplicate filename '/devices/virtual/thermal/thermal_zone0/cdev0_weight'
Modules linked in: cpufreq_dt(+) [last unloaded: cpufreq_dt]
CPU: 0 PID: 2228 Comm: insmod Not tainted 4.2.0-rc3-00059-g44fffd9473eb #272
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<c00153e8>] (unwind_backtrace) from [<c0012368>] (show_stack+0x10/0x14)
[<c0012368>] (show_stack) from [<c053a684>] (dump_stack+0x84/0xc4)
[<c053a684>] (dump_stack) from [<c002284c>] (warn_slowpath_common+0x80/0xb0)
[<c002284c>] (warn_slowpath_common) from [<c00228ac>] (warn_slowpath_fmt+0x30/0x40)
[<c00228ac>] (warn_slowpath_fmt) from [<c012d524>] (sysfs_warn_dup+0x60/0x70)
[<c012d524>] (sysfs_warn_dup) from [<c012d244>] (sysfs_add_file_mode_ns+0x13c/0x190)
[<c012d244>] (sysfs_add_file_mode_ns) from [<c012d2d4>] (sysfs_create_file_ns+0x3c/0x48)
[<c012d2d4>] (sysfs_create_file_ns) from [<c03c04a8>] (thermal_zone_bind_cooling_device+0x260/0x358)
[<c03c04a8>] (thermal_zone_bind_cooling_device) from [<c03c2e70>] (of_thermal_bind+0x88/0xb4)
[<c03c2e70>] (of_thermal_bind) from [<c03c10d0>] (__thermal_cooling_device_register+0x17c/0x2e0)
[<c03c10d0>] (__thermal_cooling_device_register) from [<c03c3f50>] (__cpufreq_cooling_register+0x3a0/0x51c)
[<c03c3f50>] (__cpufreq_cooling_register) from [<bf00505c>] (cpufreq_ready+0x44/0x88 [cpufreq_dt])
[<bf00505c>] (cpufreq_ready [cpufreq_dt]) from [<c03d6c30>] (cpufreq_add_dev+0x4a0/0x7dc)
[<c03d6c30>] (cpufreq_add_dev) from [<c02cd3ec>] (subsys_interface_register+0x94/0xd8)
[<c02cd3ec>] (subsys_interface_register) from [<c03d785c>] (cpufreq_register_driver+0x10c/0x1f0)
[<c03d785c>] (cpufreq_register_driver) from [<bf0057d4>] (dt_cpufreq_probe+0x60/0x8c [cpufreq_dt])
[<bf0057d4>] (dt_cpufreq_probe [cpufreq_dt]) from [<c02d03e4>] (platform_drv_probe+0x44/0xa4)
[<c02d03e4>] (platform_drv_probe) from [<c02cead8>] (driver_probe_device+0x174/0x2b4)
[<c02cead8>] (driver_probe_device) from [<c02ceca4>] (__driver_attach+0x8c/0x90)
[<c02ceca4>] (__driver_attach) from [<c02cd078>] (bus_for_each_dev+0x68/0x9c)
[<c02cd078>] (bus_for_each_dev) from [<c02ce2f0>] (bus_add_driver+0x19c/0x214)
[<c02ce2f0>] (bus_add_driver) from [<c02cf490>] (driver_register+0x78/0xf8)
[<c02cf490>] (driver_register) from [<c0009710>] (do_one_initcall+0x8c/0x1d4)
[<c0009710>] (do_one_initcall) from [<c05396b0>] (do_init_module+0x5c/0x1b8)
[<c05396b0>] (do_init_module) from [<c0086490>] (load_module+0xd34/0xed8)
[<c0086490>] (load_module) from [<c0086704>] (SyS_init_module+0xd0/0x120)
[<c0086704>] (SyS_init_module) from [<c000f480>] (ret_fast_syscall+0x0/0x3c)
---[ end trace 3be0e7b7dc6e3c4f ]---
Fixes: db91651311c8 ("thermal: export weight to sysfs")
Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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platform_driver does not need to set an owner because
platform_driver_register() will set it.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module updates from Rusty Russell:
"Main excitement here is Peter Zijlstra's lockless rbtree optimization
to speed module address lookup. He found some abusers of the module
lock doing that too.
A little bit of parameter work here too; including Dan Streetman's
breaking up the big param mutex so writing a parameter can load
another module (yeah, really). Unfortunately that broke the usual
suspects, !CONFIG_MODULES and !CONFIG_SYSFS, so those fixes were
appended too"
* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (26 commits)
modules: only use mod->param_lock if CONFIG_MODULES
param: fix module param locks when !CONFIG_SYSFS.
rcu: merge fix for Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()
module: add per-module param_lock
module: make perm const
params: suppress unused variable error, warn once just in case code changes.
modules: clarify CONFIG_MODULE_COMPRESS help, suggest 'N'.
kernel/module.c: avoid ifdefs for sig_enforce declaration
kernel/workqueue.c: remove ifdefs over wq_power_efficient
kernel/params.c: export param_ops_bool_enable_only
kernel/params.c: generalize bool_enable_only
kernel/module.c: use generic module param operaters for sig_enforce
kernel/params: constify struct kernel_param_ops uses
sysfs: tightened sysfs permission checks
module: Rework module_addr_{min,max}
module: Use __module_address() for module_address_lookup()
module: Make the mod_tree stuff conditional on PERF_EVENTS || TRACING
module: Optimize __module_address() using a latched RB-tree
rbtree: Implement generic latch_tree
seqlock: Introduce raw_read_seqcount_latch()
...
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Most code already uses consts for the struct kernel_param_ops,
sweep the kernel for the last offending stragglers. Other than
include/linux/moduleparam.h and kernel/params.c all other changes
were generated with the following Coccinelle SmPL patch. Merge
conflicts between trees can be handled with Coccinelle.
In the future git could get Coccinelle merge support to deal with
patch --> fail --> grammar --> Coccinelle --> new patch conflicts
automatically for us on patches where the grammar is available and
the patch is of high confidence. Consider this a feature request.
Test compiled on x86_64 against:
* allnoconfig
* allmodconfig
* allyesconfig
@ const_found @
identifier ops;
@@
const struct kernel_param_ops ops = {
};
@ const_not_found depends on !const_found @
identifier ops;
@@
-struct kernel_param_ops ops = {
+const struct kernel_param_ops ops = {
};
Generated-by: Coccinelle SmPL
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Junio C Hamano <gitster@pobox.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: cocci@systeme.lip6.fr
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:
"Specifics:
- enhance Thermal Framework with several new capabilities:
* use power estimates
* compute weights with relative integers instead of percentages
* allow governors to have private data in thermal zones
* export thermal zone parameters through sysfs
Thanks to the ARM thermal team (Javi, Punit, KP).
- introduce a new thermal governor: power allocator. First in kernel
closed loop PI(D) controller for thermal control. Thanks to ARM
thermal team.
- enhance OF thermal to allow thermal zones to have sustainable power
HW specification. Thanks to Punit.
- introduce thermal driver for Intel Quark SoC x1000platform. Thanks
to Ong, Boon Leong.
- introduce QPNP PMIC temperature alarm driver. Thanks to Ivan T. I.
- introduce thermal driver for Hisilicon hi6220. Thanks to
kongxinwei.
- enhance Exynos thermal driver to handle Exynos5433 TMU. Thanks to
Chanwoo C.
- TI thermal driver now has a better implementation for EOCZ bit.
From Pavel M.
- add id for Skylake processors in int340x processor thermal driver.
- a couple of small fixes and cleanups."
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (36 commits)
thermal: hisilicon: add new hisilicon thermal sensor driver
dt-bindings: Document the hi6220 thermal sensor bindings
thermal: of-thermal: add support for reading coefficients property
thermal: support slope and offset coefficients
thermal: power_allocator: round the division when divvying up power
thermal: exynos: Add the support for Exynos5433 TMU
thermal: cpu_cooling: Fix power calculation when CPUs are offline
thermal: cpu_cooling: Remove cpu_dev update on policy CPU update
thermal: export thermal_zone_parameters to sysfs
thermal: cpu_cooling: Check memory allocation of power_table
ti-soc-thermal: request temperature periodically if hw can't do that itself
ti-soc-thermal: implement eocz bit to make driver useful on omap3
cleanup ti-soc-thermal
thermal: remove stale THERMAL_POWER_ACTOR select
thermal: Default OF created trip points to writable
thermal: core: Add Kconfig option to enable writable trips
thermal: x86_pkg_temp: drop const for thermal_zone_parameters
of: thermal: Introduce sustainable power for a thermal zone
thermal: add trace events to the power allocator governor
thermal: introduce the Power Allocator governor
...
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git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc
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This patch adds the support for hisilicon thermal sensor, within
hisilicon SoC. there will register sensors for thermal framework
and use device tree to bind cooling device.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: kongxinwei <kong.kongxinwei@hisilicon.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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In order to avoid having each driver adding their own
specific DT property to specify slope and offset,
this patch adds a basic coefficient reading from
DT thermal zone node. Right now, as the thermal
framework does not support multiple sensors,
the current coefficients apply only to the only
sensor in the thermal zone.
The supported equation is a simple linear model:
slope * <sensor reading> + offset.
slope and offset are read from the coefficients
DT property. In the same way as it is described in
the DT thermal binding.
So, as of today, the thermal framework will support
only cases like:
/* hotspot = 1 * adc + 6000 */
coefficients = <1 6000>;
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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It is common to have a linear extrapolation from
the current sensor readings and the actual temperature
value. This is specially the case when the sensor
is in use to extrapolate hotspots.
This patch adds slope and offset constants for
single sensor linear extrapolation equation. Because
the same sensor can be use in different locations,
from board to board, these constants are added
as part of thermal_zone_params.
The constants are available through sysfs.
It is up to the device driver to determine
the usage of these values.
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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In situations where there is an uneven number of cooling devices, the
division of power among them can lead to a milliwatt being dropped on
the floor due to rounding errors. This doesn't sound like a lot, but
some devices only grant the lowest cooling device state for their
maximum power. So for instance, if the granted_power is the maximum
power and all devices are getting their maximum power, one would get
max_power - 1, making it choose cooling device state 1, instead of 0.
Round the division to make the calculation more accurate.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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This patch adds the support for Exynos5433's TMU (Thermal Management Unit).
Exynos5433 has a little different register bit fields as following description:
- Support the eight trip points for rising/falling interrupt by using two registers
- Read the calibration type (1-point or 2-point) and sensor id from TRIMINFO register
- Use a little different register address
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Ensure that the CPU for which the frequency is being requested
is online. If none of the CPUs are online the requested power is
returned as 0.
Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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It was initially understood that an update to the cpu_device
(cached in cpufreq_cooling_device) was required to ascertain the
correct operating point of the device on a cpufreq policy->cpu update
or creation or deletion of a cpufreq policy.
(e.g. when the existing policy CPU goes offline).
This update is not required and it is possible to ascertain the OPPs
from the leading CPU in a cpufreq domain even if the CPU is hotplugged out.
Fixes: e0128d8ab423 ("thermal: cpu_cooling: implement the power cooling device API")
Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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It's useful for tuning to be able to edit thermal_zone_parameters from
userspace. Export them to the thermal_zone sysfs so that they can be
easily changed.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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We allocate the power_table in memory but we don't test whether the
allocation succeeded. Return -ENOMEM if kcalloc() fails.
Fixes: e0128d8ab423 ("thermal: cpu_cooling: implement the power cooling device API")
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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