linux-toradex.git/drivers/cpufreq, branch v4.14-rc5

cpufreq: dt: Fix sysfs duplicate filename creation for platform-device

2017-09-25T23:10:08+00:00

ti-cpufreq and cpufreq-dt-platdev drivers are registering platform-device
with same name "cpufreq-dt" using platform_device_register_*() routines.
This is leading to build warnings appended below.

Providing hardware information to OPP framework along with the platform-
device creation should be done by ti-cpufreq driver before cpufreq-dt
driver comes into place.

This patch add's TI am33xx, am43 and dra7 platforms (which use opp-v2
property) to the blacklist of devices in cpufreq-dt-platform driver to
avoid creating platform-device twice and remove build warnings.

[    2.370167] ------------[ cut here ]------------
[    2.375087] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x58/0x78
[    2.383112] sysfs: cannot create duplicate filename '/devices/platform/cpufreq-dt'
[    2.391219] Modules linked in:
[    2.394506] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-next-20170912 #1
[    2.402006] Hardware name: Generic AM33XX (Flattened Device Tree)
[    2.408437] [] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[    2.416568] [] (show_stack) from [] (dump_stack+0xac/0xe0)
[    2.424165] [] (dump_stack) from [] (__warn+0xd8/0x104)
[    2.431488] [] (__warn) from [] (warn_slowpath_fmt+0x34/0x44)
[    2.439351] [] (warn_slowpath_fmt) from [] (sysfs_warn_dup+0x58/0x78)
[    2.447938] [] (sysfs_warn_dup) from [] (sysfs_create_dir_ns+0x80/0x98)
[    2.456719] [] (sysfs_create_dir_ns) from [] (kobject_add_internal+0x9c/0x2d4)
[    2.466124] [] (kobject_add_internal) from [] (kobject_add+0x4c/0x9c)
[    2.474712] [] (kobject_add) from [] (device_add+0xcc/0x57c)
[    2.482489] [] (device_add) from [] (platform_device_add+0x100/0x220)
[    2.491085] [] (platform_device_add) from [] (platform_device_register_full+0xf4/0x118)
[    2.501305] [] (platform_device_register_full) from [] (ti_cpufreq_init+0x150/0x22c)
[    2.511253] [] (ti_cpufreq_init) from [] (do_one_initcall+0x3c/0x170)
[    2.519838] [] (do_one_initcall) from [] (kernel_init_freeable+0x1fc/0x2c4)
[    2.528974] [] (kernel_init_freeable) from [] (kernel_init+0x8/0x110)
[    2.537565] [] (kernel_init) from [] (ret_from_fork+0x14/0x3c)
[    2.545981] ---[ end trace 2fc00e213c13ab20 ]---
[    2.551051] ------------[ cut here ]------------
[    2.555931] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x254/0x2d4
[    2.564578] kobject_add_internal failed for cpufreq-dt with -EEXIST, don't try to register
things with the same name in the same directory.
[    2.577977] Modules linked in:
[    2.581261] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.13.0-next-20170912 #1
[    2.590013] Hardware name: Generic AM33XX (Flattened Device Tree)
[    2.596437] [] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[    2.604573] [] (show_stack) from [] (dump_stack+0xac/0xe0)
[    2.612172] [] (dump_stack) from [] (__warn+0xd8/0x104)
[    2.619494] [] (__warn) from [] (warn_slowpath_fmt+0x34/0x44)
[    2.627362] [] (warn_slowpath_fmt) from [] (kobject_add_internal+0x254/0x2d4)
[    2.636666] [] (kobject_add_internal) from [] (kobject_add+0x4c/0x9c)
[    2.645255] [] (kobject_add) from [] (device_add+0xcc/0x57c)
[    2.653027] [] (device_add) from [] (platform_device_add+0x100/0x220)
[    2.661615] [] (platform_device_add) from [] (platform_device_register_full+0xf4/0x118)
[    2.671833] [] (platform_device_register_full) from [] (ti_cpufreq_init+0x150/0x22c)
[    2.681779] [] (ti_cpufreq_init) from [] (do_one_initcall+0x3c/0x170)
[    2.690377] [] (do_one_initcall) from [] (kernel_init_freeable+0x1fc/0x2c4)
[    2.699510] [] (kernel_init_freeable) from [] (kernel_init+0x8/0x110)
[    2.708106] [] (kernel_init) from [] (ret_from_fork+0x14/0x3c)
[    2.716217] ---[ end trace 2fc00e213c13ab21 ]---

Fixes: edeec420de24 (cpufreq: dt-cpufreq: platdev Automatically create device with OPP v2)
Signed-off-by: Suniel Mahesh 
Acked-by: Viresh Kumar 
Signed-off-by: Rafael J. Wysocki

cpufreq: ti-cpufreq: Support additional am43xx platforms

2017-09-19T22:51:01+00:00

Rather than letting the ti-cpufreq driver match against 'ti,am4372'
machine compatible during probe let's match against 'ti,am43' so that we
can support both 'ti,am4372' and 'ti,am438x' platforms which both match
to this compatible.

Signed-off-by: Dave Gerlach 
Acked-by: Viresh Kumar 
Signed-off-by: Rafael J. Wysocki

cpufreq: dt-platdev: Add some missing platforms to the blacklist

2017-09-19T21:05:28+00:00

Commit edeec420de24 (cpufreq: dt-platdev: Automatically create cpufreq
device with OPP v2) missed adding few platforms to the blacklist which
create the cpufreq-dt device from their own drivers, after some
dependencies are sorted out.

And for those platforms, both the platform specific driver and the
cpufreq-dt-platdev driver try to create the cpufreq-dt device now.

Fix that by including those platforms in the blacklist. This doesn't include
the TI platforms, for which there is a separate patch.

Fixes: edeec420de24 (cpufreq: dt-cpufreq: platdev Automatically create device with OPP v2)
Signed-off-by: Viresh Kumar 
Signed-off-by: Rafael J. Wysocki

dmi: Mark all struct dmi_system_id instances const

2017-09-14T09:59:30+00:00

... and __initconst if applicable.

Based on similar work for an older kernel in the Grsecurity patch.

[JD: fix toshiba-wmi build]
[JD: add htcpen]
[JD: move __initconst where checkscript wants it]

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jean Delvare

Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2017-09-05T19:45:03+00:00

Pull ACPI updates from Rafael Wysocki:
 "These include a usual ACPICA code update (this time to upstream
  revision 20170728), a fix for a boot crash on some systems with
  Thunderbolt devices connected at boot time, a rework of the handling
  of PCI bridges when setting up device wakeup, new support for Apple
  device properties, support for DMA configurations reported via ACPI on
  ARM64, APEI-related updates, ACPI EC driver updates and assorted minor
  modifications in several places.

  Specifics:

   - Update the ACPICA code in the kernel to upstream revision 20170728
     including:
      * Alias operator handling update (Bob Moore).
      * Deferred resolution of reference package elements (Bob Moore).
      * Support for the _DMA method in walk resources (Bob Moore).
      * Tables handling update and support for deferred table
        verification (Lv Zheng).
      * Update of SMMU models for IORT (Robin Murphy).
      * Compiler and disassembler updates (Alex James, Erik Schmauss,
        Ganapatrao Kulkarni, James Morse).
      * Tools updates (Erik Schmauss, Lv Zheng).
      * Assorted minor fixes and cleanups (Bob Moore, Kees Cook, Lv
        Zheng, Shao Ming).

   - Rework the initialization of non-wakeup GPEs with method handlers
     in order to address a boot crash on some systems with Thunderbolt
     devices connected at boot time where we miss an early hotplug event
     due to a delay in GPE enabling (Rafael Wysocki).

   - Rework the handling of PCI bridges when setting up ACPI-based
     device wakeup in order to avoid disabling wakeup for bridges
     prematurely (Rafael Wysocki).

   - Consolidate Apple DMI checks throughout the tree, add support for
     Apple device properties to the device properties framework and use
     these properties for the handling of I2C and SPI devices on Apple
     systems (Lukas Wunner).

   - Add support for _DMA to the ACPI-based device properties lookup
     code and make it possible to use the information from there to
     configure DMA regions on ARM64 systems (Lorenzo Pieralisi).

   - Fix several issues in the APEI code, add support for exporting the
     BERT error region over sysfs and update APEI MAINTAINERS entry with
     reviewers information (Borislav Petkov, Dongjiu Geng, Loc Ho, Punit
     Agrawal, Tony Luck, Yazen Ghannam).

   - Fix a potential initialization ordering issue in the ACPI EC driver
     and clean it up somewhat (Lv Zheng).

   - Update the ACPI SPCR driver to extend the existing XGENE 8250
     workaround in it to a new platform (m400) and to work around an
     Xgene UART clock issue (Graeme Gregory).

   - Add a new utility function to the ACPI core to support using ACPI
     OEM ID / OEM Table ID / Revision for system identification in
     blacklisting or similar and switch over the existing code already
     using this information to this new interface (Toshi Kani).

   - Fix an xpower PMIC issue related to GPADC reads that always return
     0 without extra pin manipulations (Hans de Goede).

   - Add statements to print debug messages in a couple of places in the
     ACPI core for easier diagnostics (Rafael Wysocki).

   - Clean up the ACPI processor driver slightly (Colin Ian King, Hanjun
     Guo).

   - Clean up the ACPI x86 boot code somewhat (Andy Shevchenko).

   - Add a quirk for Dell OptiPlex 9020M to the ACPI backlight driver
     (Alex Hung).

   - Assorted fixes, cleanups and updates related to ACPI (Amitoj Kaur
     Chawla, Bhumika Goyal, Frank Rowand, Jean Delvare, Punit Agrawal,
     Ronald Tschalär, Sumeet Pawnikar)"

* tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (75 commits)
  ACPI / APEI: Suppress message if HEST not present
  intel_pstate: convert to use acpi_match_platform_list()
  ACPI / blacklist: add acpi_match_platform_list()
  ACPI, APEI, EINJ: Subtract any matching Register Region from Trigger resources
  ACPI: make device_attribute const
  ACPI / sysfs: Extend ACPI sysfs to provide access to boot error region
  ACPI: APEI: fix the wrong iteration of generic error status block
  ACPI / processor: make function acpi_processor_check_duplicates() static
  ACPI / EC: Clean up EC GPE mask flag
  ACPI: EC: Fix possible issues related to EC initialization order
  ACPI / PM: Add debug statements to acpi_pm_notify_handler()
  ACPI: Add debug statements to acpi_global_event_handler()
  ACPI / scan: Enable GPEs before scanning the namespace
  ACPICA: Make it possible to enable runtime GPEs earlier
  ACPICA: Dispatch active GPEs at init time
  ACPI: SPCR: work around clock issue on xgene UART
  ACPI: SPCR: extend XGENE 8250 workaround to m400
  ACPI / LPSS: Don't abort ACPI scan on missing mem resource
  mailbox: pcc: Drop uninformative output during boot
  ACPI/IORT: Add IORT named component memory address limits
  ...

Merge branch 'intel_pstate'

2017-09-03T22:05:42+00:00

* intel_pstate:
  cpufreq: intel_pstate: Shorten a couple of long names
  cpufreq: intel_pstate: Simplify intel_pstate_adjust_pstate()
  cpufreq: intel_pstate: Improve IO performance with per-core P-states
  cpufreq: intel_pstate: Drop INTEL_PSTATE_HWP_SAMPLING_INTERVAL
  cpufreq: intel_pstate: Drop ->update_util from pstate_funcs
  cpufreq: intel_pstate: Do not use PID-based P-state selection

Merge branch 'pm-cpufreq-sched'

2017-09-03T22:05:22+00:00

* pm-cpufreq-sched:
  cpufreq: schedutil: Always process remote callback with slow switching
  cpufreq: schedutil: Don't restrict kthread to related_cpus unnecessarily
  cpufreq: Return 0 from ->fast_switch() on errors
  cpufreq: Simplify cpufreq_can_do_remote_dvfs()
  cpufreq: Process remote callbacks from any CPU if the platform permits
  sched: cpufreq: Allow remote cpufreq callbacks
  cpufreq: schedutil: Use unsigned int for iowait boost
  cpufreq: schedutil: Make iowait boost more energy efficient

Merge branch 'pm-cpufreq'

2017-09-03T22:05:13+00:00

* pm-cpufreq: (33 commits)
  cpufreq: imx6q: Fix imx6sx low frequency support
  cpufreq: speedstep-lib: make several arrays static, makes code smaller
  cpufreq: ti: Fix 'of_node_put' being called twice in error handling path
  cpufreq: dt-platdev: Drop few entries from whitelist
  cpufreq: dt-platdev: Automatically create cpufreq device with OPP v2
  ARM: ux500: don't select CPUFREQ_DT
  cpufreq: Convert to using %pOF instead of full_name
  cpufreq: Cap the default transition delay value to 10 ms
  cpufreq: dbx500: Delete obsolete driver
  mfd: db8500-prcmu: Get rid of cpufreq dependency
  cpufreq: enable the DT cpufreq driver on the Ux500
  cpufreq: Loongson2: constify platform_device_id
  cpufreq: dt: Add r8a7796 support to to use generic cpufreq driver
  cpufreq: remove setting of policy->cpu in policy->cpus during init
  cpufreq: mediatek: add support of cpufreq to MT7622 SoC
  cpufreq: mediatek: add cleanups with the more generic naming
  cpufreq: rcar: Add support for R8A7795 SoC
  cpufreq: dt: Add rk3328 compatible to use generic cpufreq driver
  cpufreq: s5pv210: add missing of_node_put()
  cpufreq: Allow dynamic switching with CPUFREQ_ETERNAL latency
  ...

intel_pstate: convert to use acpi_match_platform_list()

2017-08-28T23:42:49+00:00

Convert to use acpi_match_platform_list() for the platform check.
There is no change in functionality.

Signed-off-by: Toshi Kani 
Acked-by: Srinivas Pandruvada 
Reviewed-by: Borislav Petkov 
Signed-off-by: Rafael J. Wysocki

cpufreq: imx6q: Fix imx6sx low frequency support

2017-08-28T22:22:52+00:00

This patch contains the minimal changes required to support imx6sx OPP
of 198 Mhz. Without this patch cpufreq still reports success but the
frequency is not changed, the "arm" clock will still be at 396000000 in
clk_summary.

In order to do this PLL1 needs to be still kept enabled while changing
the ARM clock. This is a hardware requirement: when ARM_PODF is changed
in CCM we need to check the busy bit of CCM_CDHIPR bit 16 arm_podf_busy,
and this bit is sync with PLL1 clock, so if PLL1 NOT enabled, this
bit will never get clear.

Keep pll1_sys explicitly enabled until after the rate is change to deal
with this. Otherwise from the clk framework perspective pll1_sys is
unused and gets turned off.

Signed-off-by: Leonard Crestez 
Reviewed-by: Lucas Stach 
Signed-off-by: Rafael J. Wysocki