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[PATCH v3 0/6] thermal: exynos: Add kernel thermal support for exynos platform

by Amit Daniel Kachhap

Hi Andrew, This patchset introduces a new generic cooling device based on cpufreq that can be used on non-ACPI platforms. As a proof of concept, we have drivers for the following platforms using this mechanism now: * TI OMAP (git://git.linaro.org/people/amitdanielk/linux.git omap4460_thermal) * Samsung Exynos (Exynos4 and Exynos5) in the current patchset. * Freescale i.MX (git://git.linaro.org/people/amitdanielk/linux.git imx6q_thermal) These patches have been reviewed by Rui Zhang (https://lkml.org/lkml/2012/4/9/448) who seems to agree with them in principle, but I haven't had any luck getting them merged, perhaps a lack of maintainer bandwidth. ACPI platforms currently have such a mechanism but it is wrapped in ACPI'isms that we don't have on ARM platforms. If this is accepted, I'm proposing to convert over the ACPI thermal driver to use this common code too. Can you please merge these patches for 3.5? Thanks, Amit Daniel Changes since V2: *Added Exynos5 TMU sensor support by enhancing the exynos4 tmu driver. Exynos5 TMU driver was internally developed by SangWook Ju <sw.ju(a)samsung.com>. *Removed cpuhotplug cooling code in this patchset. *Rebased the patches against 3.4-rc6 kernel. Changes since V1: *Moved the sensor driver to driver/thermal folder from driver/hwmon folder as suggested by Mark Brown and Guenter Roeck *Added notifier support to notify the registered drivers of any cpu cooling action. The driver can modify the default cooling behaviour(eg set different max clip frequency). *The percentage based frequency replaced with absolute clipped frequency. *Some more conditional checks when setting max frequency. *Renamed the new trip type THERMAL_TRIP_STATE_ACTIVE to THERMAL_TRIP_STATE_INSTANCE *Many review comments from R, Durgadoss <durgadoss.r(a)intel.com> and eduardo.valentin(a)ti.com implemented. *Removed cooling stats through debugfs patch *The V1 based can be found here, https://lkml.org/lkml/2012/2/22/123 http://lkml.org/lkml/2012/3/3/32 Changes since RFC: *Changed the cpu cooling registration/unregistration API's to instance based *Changed the STATE_ACTIVE trip type to pass correct instance id *Adding support to restore back the policy->max_freq after doing frequency clipping. *Moved the trip cooling stats from sysfs node to debugfs node as suggested by Greg KH greg(a)kroah.com *Incorporated several review comments from eduardo.valentin(a)ti.com *Moved the Temperature sensor driver from driver/hwmon/ to driver/mfd as discussed with Guenter Roeck <guenter.roeck(a)ericsson.com> and Donggeun Kim <dg77.kim(a)samsung.com> (https://lkml.org/lkml/2012/1/5/7) *Some changes according to the changes in common cpu cooling APIs *The RFC based patches can be found here, https://lkml.org/lkml/2011/12/13/186 https://lkml.org/lkml/2011/12/21/169 Brief Description: 1) The generic cooling devices code is placed inside driver/thermal/* as placing inside acpi folder will need un-necessary enabling of acpi code. This codes is architecture independent. 2) This patchset adds a new trip type THERMAL_TRIP_STATE_INSTANCE which passes cooling device instance number and may be helpful for cpufreq cooling devices to take the correct cooling action. This trip type avoids the temperature comparision check again inside the cooling handler. 3) This patchset adds generic cpu cooling low level implementation through frequency clipping and cpu hotplug. In future, other cpu related cooling devices may be added here. An ACPI version of this already exists (drivers/acpi/processor_thermal.c). But this will be useful for platforms like ARM using the generic thermal interface along with the generic cpu cooling devices. The cooling device registration API's return cooling device pointers which can be easily binded with the thermal zone trip points. The important APIs exposed are, a)struct thermal_cooling_device *cpufreq_cooling_register( struct freq_clip_table *tab_ptr, unsigned int tab_size, const struct cpumask *mask_val) b)void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 4) Samsung exynos platform thermal implementation is done using the generic cpu cooling APIs and the new trip type. The temperature sensor driver present in the hwmon folder(registered as hwmon driver) is moved to thermal folder and registered as a thermal driver. All this patchset is based on Kernel version 3.4-rc6 A simple data/control flow diagrams is shown below, Core Linux thermal <-----> Exynos thermal interface <----- Temperature Sensor | | \|/ | Cpufreq cooling device <--------------- TODO: *Will send the DT enablement patches later after the driver is merged. Amit Daniel Kachhap (6): thermal: Add a new trip type to use cooling device instance number thermal: Add generic cpufreq cooling implementation hwmon: exynos4: Move thermal sensor driver to driver/thermal directory thermal: exynos5: Add exynos5 thermal sensor driver support thermal: exynos: Register the tmu sensor with the kernel thermal layer ARM: exynos: Add thermal sensor driver platform data support Documentation/hwmon/exynos4_tmu | 81 --- Documentation/thermal/cpu-cooling-api.txt | 60 ++ Documentation/thermal/exynos_thermal | 52 ++ Documentation/thermal/sysfs-api.txt | 4 +- drivers/hwmon/Kconfig | 10 - drivers/hwmon/Makefile | 1 - drivers/hwmon/exynos4_tmu.c | 514 -------------- drivers/thermal/Kconfig | 20 + drivers/thermal/Makefile | 4 +- drivers/thermal/cpu_cooling.c | 359 ++++++++++ drivers/thermal/exynos_thermal.c | 933 ++++++++++++++++++++++++++ drivers/thermal/thermal_sys.c | 62 ++- include/linux/cpu_cooling.h | 62 ++ include/linux/platform_data/exynos4_tmu.h | 83 --- include/linux/platform_data/exynos_thermal.h | 100 +++ include/linux/thermal.h | 1 + 16 files changed, 1651 insertions(+), 695 deletions(-) delete mode 100644 Documentation/hwmon/exynos4_tmu create mode 100644 Documentation/thermal/cpu-cooling-api.txt create mode 100644 Documentation/thermal/exynos_thermal delete mode 100644 drivers/hwmon/exynos4_tmu.c create mode 100644 drivers/thermal/cpu_cooling.c create mode 100644 drivers/thermal/exynos_thermal.c create mode 100644 include/linux/cpu_cooling.h delete mode 100644 include/linux/platform_data/exynos4_tmu.h create mode 100644 include/linux/platform_data/exynos_thermal.h

13 years, 2 months

[PATCH] ARM: exynos: Adapt to cpuidle core time keeping and irq enable

by Amit Daniel Kachhap

This patch enables core cpuidle timekeeping and irq enabling and remove those redundant parts from the exynos cpuidle drivers CC: Daniel Lezcano <daniel.lezcano(a)linaro.org> CC: Robert Lee <rob.lee(a)linaro.org> Signed-off-by: Amit Daniel <amit.kachhap(a)linaro.org> --- arch/arm/mach-exynos/cpuidle.c | 53 ++++----------------------------------- 1 files changed, 6 insertions(+), 47 deletions(-) diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c index 33ab4e7..26dac28 100644 --- a/arch/arm/mach-exynos/cpuidle.c +++ b/arch/arm/mach-exynos/cpuidle.c @@ -20,6 +20,7 @@ #include <asm/smp_scu.h> #include <asm/suspend.h> #include <asm/unified.h> +#include <asm/cpuidle.h> #include <mach/regs-pmu.h> #include <mach/pmu.h> @@ -34,22 +35,12 @@ #define S5P_CHECK_AFTR 0xFCBA0D10 -static int exynos4_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index); static int exynos4_enter_lowpower(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index); static struct cpuidle_state exynos4_cpuidle_set[] __initdata = { - [0] = { - .enter = exynos4_enter_idle, - .exit_latency = 1, - .target_residency = 100000, - .flags = CPUIDLE_FLAG_TIME_VALID, - .name = "C0", - .desc = "ARM clock gating(WFI)", - }, + [0] = ARM_CPUIDLE_WFI_STATE, [1] = { .enter = exynos4_enter_lowpower, .exit_latency = 300, @@ -63,8 +54,9 @@ static struct cpuidle_state exynos4_cpuidle_set[] __initdata = { static DEFINE_PER_CPU(struct cpuidle_device, exynos4_cpuidle_device); static struct cpuidle_driver exynos4_idle_driver = { - .name = "exynos4_idle", - .owner = THIS_MODULE, + .name = "exynos4_idle", + .owner = THIS_MODULE, + .en_core_tk_irqen = 1, }; /* Ext-GIC nIRQ/nFIQ is the only wakeup source in AFTR */ @@ -103,13 +95,8 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - struct timeval before, after; - int idle_time; unsigned long tmp; - local_irq_disable(); - do_gettimeofday(&before); - exynos4_set_wakeupmask(); /* Set value of power down register for aftr mode */ @@ -150,34 +137,6 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev, /* Clear wakeup state register */ __raw_writel(0x0, S5P_WAKEUP_STAT); - do_gettimeofday(&after); - - local_irq_enable(); - idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC + - (after.tv_usec - before.tv_usec); - - dev->last_residency = idle_time; - return index; -} - -static int exynos4_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - struct timeval before, after; - int idle_time; - - local_irq_disable(); - do_gettimeofday(&before); - - cpu_do_idle(); - - do_gettimeofday(&after); - local_irq_enable(); - idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC + - (after.tv_usec - before.tv_usec); - - dev->last_residency = idle_time; return index; } @@ -192,7 +151,7 @@ static int exynos4_enter_lowpower(struct cpuidle_device *dev, new_index = drv->safe_state_index; if (new_index == 0) - return exynos4_enter_idle(dev, drv, new_index); + return arm_cpuidle_simple_enter(dev, drv, new_index); else return exynos4_enter_core0_aftr(dev, drv, new_index); } -- 1.7.1

13 years, 2 months

Agenda posted to https://wiki.linaro.org/Platform/Android/Meetings/2012-05-09

by Zach Pfeffer

See everyone tomorrow. Feel free to add to the agenda: https://wiki.linaro.org/Platform/Android/Meetings/2012-05-09 Also, please list your status. Thanks! -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

13 years, 2 months

[PATCH 0/2] ARM: OMAP3/4: cpuidle - misc fixes

by Daniel Lezcano

These two patches are coming from the series I previously sent for the cpuidle OMAP3/4 cleanups. The first one, move the powerdomain lookup check in the init function, the second one fix the linkage error, when the CONFIG_PM is not set while CONFIG_CPU_IDLE is. Omap's Kconfig has been modified to select CONFIG_PM when CONFIG_CPU_IDLE is set. I compiled with different options but I was not able to boot my board because the kernel panics for another reason. Daniel Lezcano (2): ARM: OMAP3: cpuidle - check the powerdomain lookup ARM: OMAP3/4: consolidate cpuidle Makefile arch/arm/mach-omap2/Kconfig | 2 ++ arch/arm/mach-omap2/Makefile | 11 +++++++---- arch/arm/mach-omap2/cpuidle34xx.c | 11 +++-------- arch/arm/mach-omap2/cpuidle44xx.c | 8 -------- arch/arm/mach-omap2/pm.h | 17 +++++++++++++++-- 5 files changed, 27 insertions(+), 22 deletions(-) -- 1.7.5.4

13 years, 2 months

linux-linaro-core-tracking tree created

by Andrey Konovalov

Greetings, I've just created linux-linaro-core-tracking branch in git://git.linaro.org/kernel/linux-linaro-tracking.git. It is based on mainline tip, and has all the Platform and Working Groups topics which would appear in the next linux-linaro kernel release. No topics from the Landing Teams there (this is what "core" implies). This tree will be the basis for the next (12.05) linux-linaro kernel release. So if you have a topic to be added to 12.05 you can ask me to add it (the sooner you ask, the better), and it will appear in linux-linaro-core-tracking first. The request to add a topic must include the git tree location for me to pull the topic from, and the base used by this topic (mainline, or another topic). If no base for the topic is specified, the mainline is assumed. If needed, this is ok to rebase the topic; this would be easier for me to handle than e.g. reconfiguring my scripts to use topic-3.4rc5 branch instead of topic-3.4rc4 branch used so far etc. Again, starting from now this tree is open for the next release (12.05) topics. The linux-linaro-core-tracking tree is first of all to identify the conflicts early, so it could fail to build sometimes, or the kernel built from it may not boot etc. The plan is to rebase this tree on the current mainline tip daily. The topics causing the conflicts would be excluded from the linux-linaro-core-tracking tree, and would be brought back into it after the conflicts are resolved by the topic owners. Thanks, Andrey

13 years, 2 months

PowerVR, 3.3 kernel and omap_drm

by Martin Ertsås

Hi. I have gotten a lot of help from you guys getting the PowerVR drivers up and running with the 3.3 kernel on the Pandaboard ES. Problem now is that all I tested then, was that X was running. After some more work, we tried out EGL, and found out that this is not working. The 3.3 kernel I'm using is revision f8e851d03e884b60b5207f59a342da9cafdb415f from tilt-3.3 from the ti-landing team. I'm using the PowerVR drivers in http://ppa.launchpad.net/tiomap-dev/omap-trunk/ubuntu/pool/main/, that is pvr-omap4_1.7.15.0.1.57 and pvr-omap4-dkms_1.7.15.0.1.54. I'm also using the libdrm, libdri2 and xorg server from the same place, using the versions from: https://launchpad.net/~tiomap-dev/+archive/omap-trunk?field.series_filter=p… Problem is, when trying to run something using EGL, I get the output from: http://pastebin.com/e5deVmiD Running it through gdb on the device, I see that it segfaults in omap_bo_handle in /usr/lib/libdrm_omap.so.1 This file is compiled, using the patches listed in debian/patches/series in the latest commit from git://gitorious.org/ubuntu-omap/libdrm.git, and with configure arguments: --enable-omap-experimental-api --enable-udev --enable-libkms --disable-radeon Any ideas on what might be wrong or what I can try? I have tried copying the libdrm_omap binary from the ppa, as it looks like that might be at fault, but no luck. Best Regards Martin Ertsas

13 years, 2 months

No group tracks at Connect

by Zach Pfeffer

While we're planning for connect, I'd like to suggest that we do away with team tracks all together and just have topic tracks. This would align with our topic based approach to things now, and would be a way to breakdown our silo's. The topic track would be lead by a topic champion. What do people think? -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog

13 years, 2 months

Blueprints and topics to be covered at 12.05 by the Developer Platform Team

by Ricardo Salveti

Hi, Trying to get back to the proper way of scheduling and publishing what will be covered by the Developer Platform team during the 12.05 cycle, follows the blueprint description of what we're planning to work on during this cycle. Milestone link: https://launchpad.net/linaro-dev-platform/+milestone/12.05 The list is quite long, but most of the blueprints are basically covering work that was supposed to get done during 12.04, that unfortunately got blocked once LAVA got off-line. Some interesting topics we'll cover this month: * Common Ubuntu kernel config fragment across all kernel packages used at the LEB * Ubuntu sauce produced as a topic branch for Linux Linaro * Cross toolchain updates based on 4.7 for Quantal * Enablement test cases to be used with LAVA (usb-host-mode and others) * Cross buildd and multi-arch fixes planning work that might come with the ARMv8 effort Hopefully this cycle we'll also be able to get the images in a better shape sooner, trying to get the QA and Release team more involved with our releases (to improve our image/builds quality). Thanks! -- Ricardo Salveti de Araujo

13 years, 2 months

[PATCH 00/18][V3] ARM: OMAP3/4 : cpuidle34xx and cpuidle44xx cleanups

by Daniel Lezcano

This patchset makes some cleanup on these cpuidle drivers and consolidate the code across both architecture. Tested on OMAP3 (igepV2). Partially tested on OMAP4 (pandaboard), without offlining the cpu1. V3 : * replace OMAP4_NUM_STATES and OMAP3_NUM_STATES by ARRAY_SIZE * Fixed changelog * Fixed OMAP4_NUM_STATES going back and forth in the patchset * Removed erratum check at init time V2 : * Fixed a couple of typos in the patch description V1 : Initial Post Daniel Lezcano (18): ARM: OMAP4: cpuidle - Remove unused valid field ARM: OMAP4: cpuidle - Declare the states with the driver declaration ARM: OMAP4: cpuidle - Remove the cpuidle_params_table table ARM: OMAP4: cpuidle - fix static omap4_idle_data declaration ARM: OMAP4: cpuidle - Initialize omap4_idle_data at compile time ARM: OMAP4: cpuidle - use the omap4_idle_data variable directly ARM: OMAP4: cpuidle - remove omap4_idle_data initialization at boot time ARM: OMAP3: cpuidle - remove rx51 cpuidle parameters table ARM: OMAP3: define cpuidle statically ARM: OMAP3: cpuidle - remove errata check in the init function ARM: OMAP3: cpuidle - remove the 'valid' field ARM: OMAP3: cpuidle - remove cpuidle_params_table ARM: OMAP3: define statically the omap3_idle_data ARM: OMAP3: cpuidle - use omap3_idle_data directly ARM: OMAP3: cpuidle - simplify next_valid_state ARM: OMAP3: set omap3_idle_data as static ARM: OMAP3/4: consolidate cpuidle Makefile ARM: OMAP3: cpuidle - set global variables static arch/arm/mach-omap2/Makefile | 11 +- arch/arm/mach-omap2/board-rx51.c | 38 +++--- arch/arm/mach-omap2/cpuidle34xx.c | 306 +++++++++++++++---------------------- arch/arm/mach-omap2/cpuidle44xx.c | 134 +++++++---------- arch/arm/mach-omap2/pm.h | 38 ++--- 5 files changed, 212 insertions(+), 315 deletions(-) -- 1.7.5.4

13 years, 2 months

[PATCH v2 0/3] Add imx cpuidle

by Robert Lee

Add common imx cpuidle initialization functionality and add a i.MX5 and i.MX6Q platform cpuidle implementation. Based on v3.4-rc5 plus recently submitted device tree late_initcall patch: http://www.spinics.net/lists/arm-kernel/msg171620.html Changes since v1: * Removed some unnecessary spaces * Added return value for an error message * Reworked init scheme to use device tree late_initcall. * Moved imx6q and imx5 cpuidle functionality to existing files. Robert Lee (3): ARM: imx: Add common imx cpuidle init functionality. ARM: imx: Add imx5 cpuidle driver ARM: imx: Add imx6q cpuidle driver arch/arm/mach-imx/cpuidle-imx6q.c | 33 ++++++++++++ arch/arm/mach-imx/mach-imx6q.c | 18 +++++++ arch/arm/mach-imx/mm-imx5.c | 42 ++++++++++++++-- arch/arm/plat-mxc/Makefile | 1 + arch/arm/plat-mxc/cpuidle.c | 80 ++++++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/cpuidle.h | 22 ++++++++ 6 files changed, 193 insertions(+), 3 deletions(-) create mode 100644 arch/arm/mach-imx/cpuidle-imx6q.c create mode 100644 arch/arm/plat-mxc/cpuidle.c create mode 100644 arch/arm/plat-mxc/include/mach/cpuidle.h -- 1.7.10

13 years, 2 months

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