Simple patch to make symbols static. Symbols that are not
shared with other parts of the kernel can be made static.
This change also removes several sparse complains.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Ajit Pal Singh <ajitpal.singh@st.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Some temperature sensors only get updated every few seconds and while
waiting for the first irq reporting a (new) temperature to happen there
get_temp operand will return -EAGAIN as it does not have any data to report
yet.
Not logging an error in this case avoids messages like these from showing
up in dmesg on affected systems:
[ 1.219353] thermal thermal_zone0: failed to read out thermal zone 0
[ 2.015433] thermal thermal_zone0: failed to read out thermal zone 0
[ 2.416737] thermal thermal_zone0: failed to read out thermal zone 0
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Default attributes are created when the device is registered. Attributes
created after device registration can lead to race conditions, where user space
(e.g. udev) sees the device but not the attributes.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
When thermal zone device register fails or on module exit, the memory
for aux_trip is not freed. This change fixes this issue.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This patch fixes the wrong control of PD_DET_EN (power down detection mode)
for Exynos7 because exynos7_tmu_control() always enables the power down detection
mode regardless 'on' parameter.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
It is possible that _ART/_TRT tables are missing or have errors.
Ignore those failures, as INT3400 thermal zone is still required
for _OSC or mode switch.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Enable Intel Powerclamp driver on Atom* Processor C2000 Product
Family for Microservers (Avoton). Avoton - SoCs for micro-servers
has package C-states which can be used for idle injection.
Reported-by: Jose Navarro <jose.navarro@intel.com>
Suggested-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Tested-by: Jose Carlos Venegas Munoz <jos.c.venegas.munoz@intel.com>
Signed-off-by: Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Swap interrupt disable and thermal zone unregistration in the error and
remove paths, to make them more symmetrical with the initialization
path.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
As soon as the interrupt has been enabled by devm_request_irq(), the
interrupt routine may be called, depending on the current status of the
hardware.
However, at that point rcar_thermal_common hasn't been initialized
complely yet. E.g. rcar_thermal_common.base is still NULL, causing a
NULL pointer dereference:
Unable to handle kernel NULL pointer dereference at virtual address 0000000c
pgd = c0004000
[0000000c] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-rc7-ape6evm-04564-gb6e46cb7cbe82389 #30
Hardware name: Generic R8A73A4 (Flattened Device Tree)
task: ee8953c0 ti: ee896000 task.ti: ee896000
PC is at rcar_thermal_irq+0x1c/0xf0
LR is at _raw_spin_lock_irqsave+0x48/0x54
Postpone the call to devm_request_irq() until all initialization has
been done to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The cpufreq_cooling_unregister() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Fix following build warning if CONFIG_PM_SLEEP is not set:
drivers/thermal/ti-soc-thermal/ti-bandgap.c:1478:12: warning: 'ti_bandgap_suspend' defined but not used [-Wunused-function]
static int ti_bandgap_suspend(struct device *dev)
^
drivers/thermal/ti-soc-thermal/ti-bandgap.c:1492:12: warning: 'ti_bandgap_resume' defined but not used [-Wunused-function]
static int ti_bandgap_resume(struct device *dev)
^
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The exynos_tmu_data() function should on entrance test not only for valid
data pointer, but also for data->tmu_read one.
It is important, since afterwards it is dereferenced to get temperature code.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
this patch fixes following sparse warning:
processor_thermal_device.c:188:6: warning: symbol 'proc_thermal_remove' was not declared. Should it be static?
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Add registers, bit fields and compatible strings for Exynos7 TMU
(Thermal Management Unit). Following are a few of the differences
in the Exynos7 TMU from earlier SoCs:
- 8 trigger levels
- Different bit offsets and more registers for the rising
and falling thresholds.
- New power down detection bit in the TMU_CONTROL register
which does not update the CURRENT_TEMP0 when tmu power down
is detected.
- Change in bit offset for the NEXT_DATA field of EMUL_CON
register. EMUL_CON register address has also changed.
- INTSTAT and INTCLEAR registers present in earlier SoCs
have been combined into one INTPEND register. The register
address for INTCLEAR and INTPEND is also different.
- Since there are 8 rising/falling interrupts as against
at most 4 in earlier SoCs the INTEN bit offsets are different.
- Multiple probe support which is handled by a TMU_CONTROL1
register (No support for this in the current patch).
This patch adds special clock support required only for Exynos7. It
also updates the "code_to_temp" prototype as Exynos7 has 9 bit
code-temp mapping.
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
When LPAT table is present, we need to convert raw temperature to
real temp using LPAT.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Added Intel Braswell CPU id for SOC DTS. Since this doesn't support
APIC IRQ, the driver is modified to have capability to not register
any modifiable trips.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Up till now, by mistake, wrong variable was tested against being NULL.
Since exynos_report_trigger() is always called with valid p pointer,
it is only necessary to check if a valid thermal zone device is passed.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
After removing exynos_thermal_common.[c|h] files the CONFIG_EXYNOS_THERMA_CORE
is not needed anymore.
This patch removes this entry from Kconfig.
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Data already present in the exynos_tmu_data.c file has been moved to the
appropriate device tree files.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
In general, the kernel should report temperature readings exactly as
reported by the hardware. The cpu / gpu thermal driver works in 5 degree
increments,but we ought to do more accurate. The temperature will do
linear interpolation between the entries in the table.
Test= $md5sum /dev/zero &
$while true; do grep "" /sys/class/thermal/thermal_zone[1-2]/temp;
sleep .5; done
e.g. We can get the result as follows:
/sys/class/thermal/thermal_zone1/temp:39994
/sys/class/thermal/thermal_zone2/temp:39086
/sys/class/thermal/thermal_zone1/temp:39994
/sys/class/thermal/thermal_zone2/temp:39540
/sys/class/thermal/thermal_zone1/temp:39540
/sys/class/thermal/thermal_zone2/temp:39540
/sys/class/thermal/thermal_zone1/temp:39540
/sys/class/thermal/thermal_zone2/temp:39994
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
After defining all necessary Exynos data in the device tree and heavy
reusage of the of-thermal.c those files can be removed.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This patch brings support for providing configuration via device tree.
Previously this data has been hardcoded in the exynos_tmu_data.c file.
Such approach was not scalable and very often required copying the whole
data.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Up till now exynos_tmu_data.c was used for storing CPU cooling configuration
data. Now the Exynos thermal core code uses device tree to get this data.
For this purpose generic thermal code for configuring CPU cooling was
used.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This patch is a preparatory patch to be able to read Exynos thermal
configuration from the device tree.
It turned out that DTC is not able to interpret enums properly and hence
it is necessary to #define those values explicitly.
For this reason the ./include/dt-bindings/thermal/thermal_exynos.h file
has been introduced.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Up till now the thermal_zone mode was by default "disabled". With this
patch the default behavior was changed to "enable".
One can read the mode at:
/sys/class/thermal/thermal_zone0/mode
Tested-by: Javi Merino <javi.merino@arm.com>
Reported-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Added thermal zones for processor thermal using APIs provided by
int340x thermal zone module.
Like other INT340x devices, processor thermal device can also contain
trip points and way to get temperature. On some platform there is
no ACPI _TMP method, in those platform using IA64 architecture MSRs to
get temperature.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Using APIs from int340x thermal zone module to add and remove thermal
zones.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Using APIs from int340x thermal zone module to add and remove thermal
zones.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Most of the processing for each int340x driver to add a thermal zone
is very similar and every driver has to duplicate code.
Created a common module, which exports API to add and remove zones.
In this way, we not only avoid duplicate code but also helps in
bug fixes and enhancements.
If for some driver default processing for thermal zone callback is
not enough they can overide individual callback.
The code for this driver is primarily copied from int3402_thermal.c.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Contrary to common expectations for an "int" return, these functions
return only a positive value -- if used correctly they cannot even
return 0 because the message header will necessarily be in the skb.
This makes the very common pattern of
if (genlmsg_end(...) < 0) { ... }
be a whole bunch of dead code. Many places also simply do
return nlmsg_end(...);
and the caller is expected to deal with it.
This also commonly (at least for me) causes errors, because it is very
common to write
if (my_function(...))
/* error condition */
and if my_function() does "return nlmsg_end()" this is of course wrong.
Additionally, there's not a single place in the kernel that actually
needs the message length returned, and if anyone needs it later then
it'll be very easy to just use skb->len there.
Remove this, and make the functions void. This removes a bunch of dead
code as described above. The patch adds lines because I did
- return nlmsg_end(...);
+ nlmsg_end(...);
+ return 0;
I could have preserved all the function's return values by returning
skb->len, but instead I've audited all the places calling the affected
functions and found that none cared. A few places actually compared
the return value with <= 0 in dump functionality, but that could just
be changed to < 0 with no change in behaviour, so I opted for the more
efficient version.
One instance of the error I've made numerous times now is also present
in net/phonet/pn_netlink.c in the route_dumpit() function - it didn't
check for <0 or <=0 and thus broke out of the loop every single time.
I've preserved this since it will (I think) have caused the messages to
userspace to be formatted differently with just a single message for
every SKB returned to userspace. It's possible that this isn't needed
for the tools that actually use this, but I don't even know what they
are so couldn't test that changing this behaviour would be acceptable.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the ctemp is used for rcar_thermal_write() in
rcar_thermal_update_temp(), the type of 'ctemp' should be "u32" instead
of "int". This patch also changes type of the helper variables 'old'
and 'new'.
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
On R-Mobile APE6, since it has 3 thermal zones, ENR register
has enable bits in bit 19-16, bit 11-8 and bit 3-0.
However, on R-Car gen2, since it has 1 thermal zone, ENR register has
enable bits in bit 3-0. (In other words, the write value should always
be 0 for bit 31-4 of ENR register.)
So, this patch fixes the ENR register value using I/O resource sets.
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Thermal sensor's clk is from pll3_usb_otg, per hardware
design requirement, need to make sure pll3_usb_otg is disabled
before STOP mode is entered, otherwise, all PFDs under it may
enter incorrect state, this patch disables pll3_usb_otg before
suspend and enables it after resume.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
there is no ACPI device object
processor_thermal_device driver needs ACPI support to work. Thus, the driver
probing should fail when there is no ACPI device object asscociated.
This fixes a NULL pointer dereference when the driver is loaded
with INT340X feature disabled in BIOS.
Reported-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>
For some INT340X thermal devices, even if they are not referred in
_TRT/_ART table, they still can be used by userspace for thermal control.
Thus change the code to enumerated all the INT340X devices,
no matter if they're referred in _TRT/_ART or not.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
With gcc 4.1.2, 4.2, and 4.2.4 (4.4 and later are OK):
drivers/thermal/thermal_core.h:110: warning: type qualifiers ignored on function return type
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: ce8be77859 ("thermal: of: Extend of-thermal to export table of trip points")
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The Int340x thermal provides a processor thermal device, which
is used to control processor thermal states. These devices are
either reported as a PCI device or an ACPI device. This
device provides power limits, control states and optional
temperature.
This change implements minimal requirements to expose processor
power limits which can be used during thermal power limiting.
Power limits are exposed via an attribute group called
"power_limits" under the device. The exported attributes
are:
power_limit_0_max_uw
power_limit_1_max_uw
power_limit_0_min_uw
power_limit_1_min_uw
power_limit_0_tmin_us
power_limit_1_tmin_us
power_limit_0_tmax_us
power_limit_1_tmax_us
power_limit_0_step_uw
power_limit_1_step_uw
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The node field of struct cpufreq_cooling_device was reintroduced in
2dcd851fe4 (thermal: cpu_cooling: Update always cpufreq policy with
thermal constraints) but without the documentation that it once had.
Add it back so that all the fields of struct cpufreq_cooling_device
are documented.
Cc: Yadwinder Singh Brar <yadi.brar@samsung.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: Zhang Rui <rui.zhang@intel.com>
Eduardo Valentin