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2020-10-12thermal: imx: Use dev_err_probe() to simplify error handlingAnson Huang1-16/+6
dev_err_probe() can reduce code size, uniform error handling and record the defer probe reason etc., use it to simplify the code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/1597129185-8460-1-git-send-email-Anson.Huang@nxp.com
2020-08-06Merge tag 'thermal-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linuxLinus Torvalds1-41/+19
Pull thermal updates from Daniel Lezcano: - Add support to enable/disable the thermal zones resulting on core code and drivers cleanup (Andrzej Pietrasiewicz) - Add generic netlink support for userspace notifications: events, temperature and discovery commands (Daniel Lezcano) - Fix redundant initialization for a ret variable (Colin Ian King) - Remove the clock cooling code as it is used nowhere (Amit Kucheria) - Add the rcar_gen3_thermal's r8a774e1 support (Marian-Cristian Rotariu) - Replace all references to thermal.txt in the documentation to the corresponding yaml files (Amit Kucheria) - Add maintainer entry for the IPA (Lukasz Luba) - Add support for MSM8939 for the tsens (Shawn Guo) - Update power allocator and devfreq cooling to SPDX licensing (Lukasz Luba) - Add Cannon Lake Low Power PCH support (Sumeet Pawnikar) - Add tsensor support for V2 mediatek thermal system (Henry Yen) - Fix thermal zone lookup by ID for the core code (Thierry Reding) * tag 'thermal-v5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (40 commits) thermal: intel: intel_pch_thermal: Add Cannon Lake Low Power PCH support thermal: mediatek: Add tsensor support for V2 thermal system thermal: mediatek: Prepare to add support for other platforms thermal: Update power allocator and devfreq cooling to SPDX licensing MAINTAINERS: update entry to thermal governors file name prefixing thermal: core: Add thermal zone enable/disable notification thermal: qcom: tsens-v0_1: Add support for MSM8939 dt-bindings: tsens: qcom: Document MSM8939 compatible thermal: core: Fix thermal zone lookup by ID thermal: int340x: processor_thermal: fix: update Jasper Lake PCI id thermal: imx8mm: Support module autoloading thermal: ti-soc-thermal: Fix reversed condition in ti_thermal_expose_sensor() MAINTAINERS: Add maintenance information for IPA thermal: rcar_gen3_thermal: Do not shadow thcode variable dt-bindings: thermal: Get rid of thermal.txt and replace references thermal: core: Move initialization after core initcall thermal: netlink: Improve the initcall ordering net: genetlink: Move initialization to core_initcall thermal: rcar_gen3_thermal: Add r8a774e1 support thermal/drivers/clock_cooling: Remove clock_cooling code ...
2020-07-07thermal: imx: Use driver's local data to decide whether to run a measurementAndrzej Pietrasiewicz1-3/+4
Use driver's local data to evaluate the need to run or not to run a measurement. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200703104354.19657-3-andrzej.p@collabora.com
2020-06-29thermal: Rename set_mode() to change_mode()Andrzej Pietrasiewicz1-4/+4
set_mode() is only called when tzd's mode is about to change. Actual setting is performed in thermal_core, in thermal_zone_device_set_mode(). The meaning of set_mode() callback is actually to notify the driver about the mode being changed and giving the driver a chance to oppose such change. To better reflect the purpose of the method rename it to change_mode() Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> [for acerhdf] Acked-by: Peter Kaestle <peter@piie.net> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200629122925.21729-12-andrzej.p@collabora.com
2020-06-29thermal: Simplify or eliminate unnecessary set_mode() methodsAndrzej Pietrasiewicz1-6/+0
Setting polling_delay is now done at thermal_core level (by not polling DISABLED devices), so no need to repeat this code. int340x: Checking for an impossible enum value is unnecessary. acpi/thermal: It only prints debug messages. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> [for acerhdf] Acked-by: Peter Kaestle <peter@piie.net> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200629122925.21729-11-andrzej.p@collabora.com
2020-06-29thermal: Use mode helpers in driversAndrzej Pietrasiewicz1-19/+14
Use thermal_zone_device_{en|dis}able() and thermal_zone_device_is_enabled(). Consequently, all set_mode() implementations in drivers: - can stop modifying tzd's "mode" member, - shall stop taking tzd's lock, as it is taken in the helpers - shall stop calling thermal_zone_device_update() as it is called in the helpers - can assume they are called when the mode truly changes, so checks to verify that can be dropped Not providing set_mode() by a driver no longer prevents the core from being able to set tzd's mode, so the relevant check in mode_store() is removed. Other comments: - acpi/thermal.c: tz->thermal_zone->mode will be updated only after we return from set_mode(), so use function parameter in thermal_set_mode() instead, no need to call acpi_thermal_check() in set_mode() - thermal/imx_thermal.c: regmap writes and mode assignment are done in thermal_zone_device_{en|dis}able() and set_mode() callback - thermal/intel/intel_quark_dts_thermal.c: soc_dts_{en|dis}able() are a part of set_mode() callback, so they don't need to modify tzd->mode, and don't need to fall back to the opposite mode if unsuccessful, as the return value will be propagated to thermal_zone_device_{en|dis}able() and ultimately tzd's member will not be changed in thermal_zone_device_set_mode(). - thermal/of-thermal.c: no need to set zone->mode to DISABLED in of_parse_thermal_zones() as a tzd is kzalloc'ed so mode is DISABLED anyway Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> [for acerhdf] Acked-by: Peter Kaestle <peter@piie.net> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200629122925.21729-8-andrzej.p@collabora.com
2020-06-29thermal: remove get_mode() operation of driversAndrzej Pietrasiewicz1-9/+0
get_mode() is now redundant, as the state is stored in struct thermal_zone_device. Consequently the "mode" attribute in sysfs can always be visible, because it is always possible to get the mode from struct tzd. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> [for acerhdf] Acked-by: Peter Kaestle <peter@piie.net> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200629122925.21729-6-andrzej.p@collabora.com
2020-06-29thermal: Store device mode in struct thermal_zone_deviceAndrzej Pietrasiewicz1-10/+7
Prepare for eliminating get_mode(). Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> [for acerhdf] Acked-by: Peter Kaestle <peter@piie.net> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200629122925.21729-5-andrzej.p@collabora.com
2020-06-29thermal/drivers: imx: Fix missing of_node_put() at probe timeAnson Huang1-3/+4
After finishing using cpu node got from of_get_cpu_node(), of_node_put() needs to be called. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/1585232945-23368-1-git-send-email-Anson.Huang@nxp.com
2020-03-20thermal: imx: Calling imx_thermal_unregister_legacy_cooling() in .removeAnson Huang1-2/+1
imx_thermal_unregister_legacy_cooling() should be used for handling legacy cpufreq cooling cleanups in .remove callback instead of calling cpufreq_cooling_unregister() and cpufreq_cpu_put() directly, especially for !CONFIG_CPU_FREQ scenario, no operation needed for handling legacy cpufreq cooling cleanups at all. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/1584088094-24857-1-git-send-email-Anson.Huang@nxp.com
2020-03-20thermal: imx: Remove unused includesAnson Huang1-7/+0
Remove unused includes to simplify the code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/1583762668-12099-1-git-send-email-Anson.Huang@nxp.com
2020-03-12thermal: imx_thermal: Use __maybe_unused instead of CONFIG_PM_SLEEPAnson Huang1-4/+2
Use __maybe_unused for power management related functions instead of #if CONFIG_PM_SLEEP to simplify the code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/1583139266-23615-1-git-send-email-Anson.Huang@nxp.com
2019-01-02thermal: imx: save one condition block for normal case of nvmem initializationAnson Huang1-2/+3
Put return value checks of calling imx_init_from_nvmem_cells() into one block to save one condition block for normal case. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2019-01-02thermal: imx: fix for dependency on cpu-freqAnson Huang1-12/+35
The thermal driver is a standalone driver for monitoring SoC temperature by enabling thermal sensor, so it can be enabled even when CONFIG_CPU_FREQ is NOT set. So remove the dependency with CPU_THERMAL. Introduce dummy function of legacy cooling register/unregister to make thermal driver probe successfully when CONFIG_CPU_FREQ is NOT set. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-10-22thermal: imx: handle error path in one place to save duplicated codeAnson Huang1-15/+14
During probe phase, the error path can be handled in one place and use goto method to save many duplicated code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-10-22thermal: imx: improve error messageAnson Huang1-1/+1
Remove the duplicated "from" to improve the error message. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-08-16Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermalLinus Torvalds1-1/+4
Pull thermal management updates from Eduardo Valentin: - rework tsens driver to add support for tsens-v2 (Amit Kucheria) - rework armada thermal driver to use syscon and multichannel support (Miquel Raynal) - fixes to TI SoC, IMX, Exynos, RCar, and hwmon drivers * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: (34 commits) thermal: armada: fix copy-paste error in armada_thermal_probe() thermal: rcar_thermal: avoid NULL dereference in absence of IRQ resources thermal: samsung: Remove Exynos5440 clock handling left-overs thermal: tsens: Fix negative temperature reporting thermal: tsens: switch from of_iomap() to devm_ioremap_resource() thermal: tsens: Rename variable thermal: tsens: Add generic support for TSENS v2 IP thermal: tsens: Rename tsens-8996 to tsens-v2 for reuse thermal: tsens: Add support to split up register address space into two dt: thermal: tsens: Document the fallback DT property for v2 of TSENS IP thermal: tsens: Get rid of unused fields in structure thermal_hwmon: Pass the originating device down to hwmon_device_register_with_info thermal_hwmon: Sanitize attribute name passed to hwmon dt-bindings: thermal: armada: add reference to new bindings dt-bindings: cp110: add the thermal node in the syscon file dt-bindings: cp110: update documentation since DT de-duplication dt-bindings: ap806: add the thermal node in the syscon file dt-bindings: cp110: prepare the syscon file to list other syscons nodes dt-bindings: ap806: prepare the syscon file to list other syscons nodes dt-bindings: cp110: rename cp110 syscon file ...
2018-07-02thermal: i.MX: Allow thermal probe to fail gracefully in case of bad calibration.Jean-Christophe Dubois1-1/+4
Without this fix, the thermal probe on i.MX6 might trigger a division by zero exception later in the probe if the calibration does fail. Note: This linux behavior (Division by zero in kernel) has been triggered on a Qemu i.MX6 emulation where parameters in nvmem were not set. With this fix the division by zero is not triggeed anymore as the thermal probe does fail early. Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-07-02cpufreq: imx6q/thermal: imx: register cooling device depending on OFBastian Stender1-4/+24
The cooling device should be part of the i.MX cpufreq driver, but it cannot be removed for the sake of DT stability. So turn the cooling device registration into a separate function and perform the registration only if the CPU OF node does not have the #cooling-cells property. Use of_cpufreq_power_cooling_register in imx_thermal code to link the cooling device to the device tree node provided. This makes it possible to bind the cpufreq cooling device to a custom thermal zone via a cooling-maps entry like: cooling-maps { map0 { trip = <&board_alert>; cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; }; }; Assuming a cpu node exists with label "cpu0" and #cooling-cells property. Signed-off-by: Bastian Stender <bst@pengutronix.de> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-06-01thermal: imx: Switch to SPDX identifierFabio Estevam1-8/+3
Adopt the SPDX license identifier headers to ease license compliance management. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-05-06thermal: imx: add i.MX7 thermal sensor supportAnson Huang1-63/+232
This patch adds i.MX7 thermal sensor support, most of the i.MX7 thermal sensor functions are same with i.MX6 except the registers offset/layout, so we move those registers offset/layout definitions to soc data structure. i.MX7 uses single calibration data @25C, the calibration data is located at OCOTP offset 0x4F0, bit[17:9], the formula is as below: Tmeas = (Nmeas - n1) + 25; n1 is the fuse value for 25C. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Bai Ping <ping.bai@nxp.com> Acked-by: Dong Aisheng <aisheng.dong@nxp.com> Acked-by: Shawn Guo <shawnguo@kernel.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-03-14thermal: imx: Fix race condition in imx_thermal_probe()Mikhail Lappo1-3/+3
When device boots with T > T_trip_1 and requests interrupt, the race condition takes place. The interrupt comes before THERMAL_DEVICE_ENABLED is set. This leads to an attempt to reading sensor value from irq and disabling the sensor, based on the data->mode field, which expected to be THERMAL_DEVICE_ENABLED, but still stays as THERMAL_DEVICE_DISABLED. Afher this issue sensor is never re-enabled, as the driver state is wrong. Fix this problem by setting the 'data' members prior to requesting the interrupts. Fixes: 37713a1e8e4c ("thermal: imx: implement thermal alarm interrupt handling") Cc: <stable@vger.kernel.org> Signed-off-by: Mikhail Lappo <mikhail.lappo@esrlabs.com> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2018-01-01thermal: imx: update to new formula according to NXP AN5215Uwe Kleine-König1-15/+11
According to an application note from 03/2017 there is an updated formula to calculate the temperature that better matches reality. This is implemented here. While updating move the magic constants from cpp defines which are far above the explaining formula to constants in the code just under the explaining comment. Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-01-01thermal: imx: use consistent style to write temperaturesUwe Kleine-König1-6/+6
The previous commit already took care to use the right notation for temperatures. Add correct units to all values representing temperatures in the right notation for the rest of the file. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-01-01thermal: imx: improve comments describing algorithm for temp calculationUwe Kleine-König1-23/+19
The description of the implemented algorithm is hardly understandable without having the right application note side-by-side to the code. Fix this by using shorter and more intuitive variable names, describe their meaning and transform a single formula instead of first talking about slope and then about "milli_Tmeas". There are no code changes. Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2018-01-01thermal: imx: Use better parameter names than "val"Uwe Kleine-König1-5/+5
The values passed to imx_init_calib() and imx_init_temp_grade() are read from specific OCOTP values. Use their names (in lower case) as parameter name instead of "val" to make the code easier to understand. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2017-09-20thermal: imx: Add support for reading OCOTP through nvmemLeonard Crestez1-30/+74
On newer imx SOCs accessing OCOTP directly is wrong because the ocotp clock needs to be enabled first. Add support for reading those same values through the nvmem API instead. The older path is preserved for compatibility with older dts and because it works correctly on imx6qdl chips. Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Acked-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2017-06-30thermal: imx: Handle return value of clk_prepare_enableArvind Yadav1-1/+4
clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2017-05-27thermal: cpu_cooling: use cpufreq_policy to register cooling deviceViresh Kumar1-5/+17
The CPU cooling driver uses the cpufreq policy, to get clip_cpus, the frequency table, etc. Most of the callers of CPU cooling driver's registration routines have the cpufreq policy with them, but they only pass the policy->related_cpus cpumask. The __cpufreq_cooling_register() routine then gets the policy by itself and uses it. It would be much better if the callers can pass the policy instead directly. This also fixes a basic design flaw, where the policy can be freed while the CPU cooling driver is still active. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Tested-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2017-02-18thermal: imx: Fix possible NULL dereference.Shailendra Verma1-0/+4
of_device_get_match_data could return NULL, and so can cause a NULL pointer dereference later. Signed-off-by: Shailendra Verma <shailendra.v@samsung.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2016-09-27thermal: Enhance thermal_zone_device_update for eventsSrinivas Pandruvada1-2/+2
Added one additional parameter to thermal_zone_device_update() to provide caller with an optional capability to specify reason. Currently this event is used by user space governor to trigger different processing based on event code. Also it saves an additional call to read temperature when the event is received. The following events are cuurently defined: - Unspecified event - New temperature sample - Trip point violated - Trip point changed - thermal device up and down - thermal device power capability changed Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2016-08-19thermal: imx: fix a possible NULL dereferenceCorentin LABBE1-3/+1
of_match_device could return NULL, and so cause a NULL pointer dereference later at line 472: data->socdata = of_id->data; For fixing this problem, we use of_device_get_match_data(), this will simplify the code a little by using a standard function for getting the match data. Reported-by: coverity (CID 1324128) Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2015-11-23imx: thermal: use CPU temperature grade info for thresholdsTim Harvey1-15/+41
The IMX6Q/IMX6DL SoC's have a 2-bit temperature grade stored in OTP which is valid for all IMX6 SoC's (despite the fact that the IMXSDLRM and IMXSXRM do not document this - this has been proven via tests as well as verified by Freescale FAE). Instead of assuming a fixed 85C for passive cooling threshold and 105C for critical use the thermal grade for these configurations. We will set the critical to maxT - 5C and passive to maxT - 10C. Cc: Anson Huang <b20788@freescale.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Jon Nettleton <jon@solid-run.com> Signed-off-by: Tim Harvey <tharvey@gateworks.com> ---- v3: - rebase against linux-soc-thermal.git - added ack's from Shawn and Jon v2: - remove check for IMX6Q and update comments: The OTP values have been tested on IMX6SOLO, IMX6DUALLITE, and IMX6SX and Freescale FAE has shared data with me that the OTP settings are the same and that the reference manuals will reflect this in their next updates. - set critical to max - 5C - set passive to max - 10C - display max temp in info - do not allow passive to be set above critical Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2015-10-30thermal: underflow bug in imx_set_trip_temp()Dan Carpenter1-1/+1
We recently changed this from unsigned long to int so it introduced an underflow bug. Fixes: 17e8351a7739 ('thermal: consistently use int for temperatures') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2015-10-30thermal: imx: register irq handler later in probeBai Ping1-8/+11
The irq handler should be registered after the tempmon module has been initialized in a known state and the thermal_zone and cpu_cooling device have been registered successfully. Otherwise, if the irq is triggled earlier before thermal probe has been finished, it may lead to 'NULL' pointer kernel panic. Signed-off-by: Bai Ping <b51503@freescale.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2015-08-03thermal: consistently use int for temperaturesSascha Hauer1-14/+13
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>
2015-05-04thermal: of: fix cooling device weights in device treeKapileshwar Singh1-1/+2
Currently you can specify the weight of the cooling device in the device tree but that information is not populated to the thermal_bind_params where the fair share governor expects it to be. The of thermal zone device doesn't have a thermal_bind_params structure and arguably it's better to pass the weight inside the thermal_instance as it is specific to the bind of a cooling device to a thermal zone parameter. Core thermal code is fixed to populate the weight in the instance from the thermal_bind_params, so platform code that was passing the weight inside the thermal_bind_params continue to work seamlessly. While we are at it, create a default value for the weight parameter for those thermal zones that currently don't define it and remove the hardcoded default in of-thermal. Cc: Zhang Rui <rui.zhang@intel.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Len Brown <lenb@kernel.org> Cc: Peter Feuerer <peter@piie.net> Cc: Darren Hart <dvhart@infradead.org> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Durgadoss R <durgadoss.r@intel.com> Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2015-01-06Thermal: imx: add clk disable/enable for suspend/resumeAnson Huang1-0/+2
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>
2014-12-21Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-socZhang Rui1-10/+5
2014-12-14Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds1-1/+0
Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
2014-12-12thermal: imx: Do not print error message in the EPROBE_DEFER caseFabio Estevam1-2/+4
During imx_thermal probe we have the following log: [ 1.514819] imx_thermal 2000000.aips-bus:tempmon: failed to register cpufreq cooling device: -517 [ 1.515064] platform 2000000.aips-bus:tempmon: Driver imx_thermal requests probe deferral Avoid printing the error message in the EPROBE_DEFER case. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-12-08thermal: imx: pass cpu_present_mask to cpufreq_cooling_register()Viresh Kumar1-3/+1
cpufreq_cooling_register() expects mask of all the CPUs where frequency constraint is applicable. This platform has more than one CPU to which these constraints will apply and so passing mask of only CPU0 wouldn't be sufficient. Also, this platform has a single cluster of CPUs and the constraint applies to all CPUs. If CPU0 is hoplugged out then we may face strange BUGs as cpu_cooling framework isn't aware of any siblings sharing clock line. Fix it by passing cpu_present_mask to cpufreq_cooling_register(). Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-12-08thermal: cpu_cooling: check for the readiness of cpufreq layerEduardo Valentin1-5/+0
In this patch, the cpu_cooling code checks for the usability of cpufreq layer before proceeding with the CPU cooling device registration. The main reason is: CPU cooling device is not usable if cpufreq cannot switch frequencies. Similar checks are spread in thermal drivers. Thus, the advantage now is to have the check in a single place: cpu cooling device registration. For this reason, this patch also updates the existing drivers that depend on CPU cooling to simply propagate the error code of the cpu cooling registration call. Therefore, in case cpufreq is not ready, the thermal drivers will still return -EPROBE_DEFER, in an attempt to try again when cpufreq layer gets ready. Cc: devicetree@vger.kernel.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org Cc: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Zhang Rui <rui.zhang@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-11-09imx: thermal: imx_get_temp might be called before sensor clock is preparedHeiner Kallweit1-16/+25
imx_get_temp might be called before the sensor clock is prepared thus resulting in a timeout of the first attempt to read temp: thermal thermal_zone0: failed to read out thermal zone 0 Happened to me on a Utilite Standard with IMX6 Dual SoC. Reason is that in imx_thermal_probe thermal_zone_device_register is called before the sensor clock is prepared. thermal_zone_device_register however calls thermal_zone_device_update which eventually calls imx_get_temp. Fix this by preparing the clock before calling thermal_zone_device_register. Signed-off-by: Heiner Kallweit <heiner.kallweit@web.de> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-11-07thermal: imx: correct driver load sequence for cpu coolingBai Ping1-0/+4
thermal driver should be regisetered after cpufreq driver has been registered and probed. Doing so is to make sure that thermal driver can get the max cpu cooling states correctly when calling get_property. Signed-off-by: Bai Ping <b51503@freescale.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-11-03Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-nextGreg Kroah-Hartman1-1/+0
Remove all .owner fields from platform drivers
2014-10-20thermal: drop owner assignment from platform_driversWolfram Sang1-1/+0
A 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>
2014-08-09Thermal: imx: add i.mx6sx thermal supportAnson Huang1-13/+78
i.MX6SX has some new features of thermal interrupt function, there are LOW, HIGH and PANIC irq for thermal sensor, so add platform data to separate different thermal version; The reset value of LOW ALARM is 0 which means the highest temp, so the LOW ALARM will be triggered once irq is enabled, so we need to correct it before enabling thermal irq; Enable PANIC ALARM as critical trip point, it will trigger system reset via SRC module once PANIC IRQ is triggered, it is pure hardware function, so use it instead of software reset by cooling device. Signed-off-by: Anson Huang <b20788@freescale.com> Tested-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2014-07-01Thermal: imx: correct critical trip temperature settingAnson Huang1-11/+7
On latest i.MX6 SOC with thermal calibration data of 0x5A100000, the critical trip temperature will be an invalid value and cause system auto shutdown as below log: thermal thermal_zone0: critical temperature reached(42 C),shutting down So, with universal formula for thermal sensor, only room temperature point is calibrated, which means the calibration data read from fuse only has valid data of bit [31:20], others are all 0, the critical trip point temperature can NOT depend on the hot point calibration data, here we set it to 20 C higher than default passive temperature. Signed-off-by: Anson Huang <b20788@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2014-04-08thermal: imx: update formula for thermal sensorAnson Huang1-13/+26
Thermal sensor used to need two calibration points which are in fuse map to get a slope for converting thermal sensor's raw data to real temperature in degree C. Due to the chip calibration limitation, hardware team provides an universal formula to get real temperature from internal thermal sensor raw data: Slope = 0.4297157 - (0.0015976 * 25C fuse); Update the formula, as there will be no hot point calibration data in fuse map from now on. Signed-off-by: Anson Huang <b20788@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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