linux.git/arch/x86/kernel/rtc.c, branch v3.17 Linux kernel source tree Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-12T02:12:22+00:00 Linus Torvalds torvalds@linux-foundation.org 2013-11-12T02:12:22+00:00 dba538ff5610ee126e33a28fe713b3f108d31f2c Pull x86/intel-mid changes from Ingo Molnar: "Update the 'intel mid' (mobile internet device) platform code as Intel is rolling out more SoC designs. This gets rid of most of the 'MRST' platform code in the process, mostly by renaming and shuffling code around into their respective 'intel-mid' platform drivers" * 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, intel-mid: Do not re-introduce usage of obsolete __cpuinit intel_mid: Move platform device setups to their own platform_<device>.* files x86: intel-mid: Add section for sfi device table intel-mid: sfi: Allow struct devs_id.get_platform_data to be NULL intel_mid: Moved SFI related code to sfi.c intel_mid: Added custom handler for ipc devices intel_mid: Added custom device_handler support intel_mid: Refactored sfi_parse_devs() function intel_mid: Renamed *mrst* to *intel_mid* pci: intel_mid: Return true/false in function returning bool intel_mid: Renamed *mrst* to *intel_mid* mrst: Fixed indentation issues mrst: Fixed printk/pr_* related issues 
Pull x86/intel-mid changes from Ingo Molnar:
 "Update the 'intel mid' (mobile internet device) platform code as Intel
  is rolling out more SoC designs.

  This gets rid of most of the 'MRST' platform code in the process,
  mostly by renaming and shuffling code around into their respective
  'intel-mid' platform drivers"

* 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, intel-mid: Do not re-introduce usage of obsolete __cpuinit
  intel_mid: Move platform device setups to their own platform_<device>.* files
  x86: intel-mid: Add section for sfi device table
  intel-mid: sfi: Allow struct devs_id.get_platform_data to be NULL
  intel_mid: Moved SFI related code to sfi.c
  intel_mid: Added custom handler for ipc devices
  intel_mid: Added custom device_handler support
  intel_mid: Refactored sfi_parse_devs() function
  intel_mid: Renamed *mrst* to *intel_mid*
  pci: intel_mid: Return true/false in function returning bool
  intel_mid: Renamed *mrst* to *intel_mid*
  mrst: Fixed indentation issues
  mrst: Fixed printk/pr_* related issues
x86/time: Honor ACPI FADT flag indicating absence of a CMOS RTC 2013-10-26T11:36:00+00:00 Jan Beulich JBeulich@suse.com 2013-10-21T08:31:57+00:00 ee5872befc9324fa4c2583c24d7ee7120314a2b7 Even though the omission was found only during code review (originally in the Xen hypervisor, looking through ACPI v5 flags and their meanings and uses), we shouldn't be creating a corresponding platform device in that case. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/5265029D02000078000FC4D2@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org> 
Even though the omission was found only during code review
(originally in the Xen hypervisor, looking through ACPI v5 flags
and their meanings and uses), we shouldn't be creating a
corresponding platform device in that case.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/5265029D02000078000FC4D2@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
intel_mid: Renamed *mrst* to *intel_mid* 2013-10-17T23:40:47+00:00 Kuppuswamy Sathyanarayanan sathyanarayanan.kuppuswamy@linux.intel.com 2013-10-17T22:35:29+00:00 712b6aa8731a7e148298c58cea66a5209c659e3c mrst is used as common name to represent all intel_mid type soc's. But moorsetwon is just one of the intel_mid soc. So renamed them to use intel_mid. This patch mainly renames the variables and related functions that uses *mrst* prefix with *intel_mid*. To ensure that there are no functional changes, I have compared the objdump of related files before and after rename and found the only difference is symbol and name changes. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Link: http://lkml.kernel.org/r/1382049336-21316-6-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 
mrst is used as common name to represent all intel_mid type
soc's. But moorsetwon is just one of the intel_mid soc. So
renamed them to use intel_mid.

This patch mainly renames the variables and related
functions that uses *mrst* prefix with *intel_mid*.

To ensure that there are no functional changes, I have compared
the objdump of related files before and after rename and found
the only difference is symbol and name changes.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: http://lkml.kernel.org/r/1382049336-21316-6-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
intel_mid: Renamed *mrst* to *intel_mid* 2013-10-17T23:40:36+00:00 Kuppuswamy Sathyanarayanan sathyanarayanan.kuppuswamy@linux.intel.com 2013-10-17T22:35:27+00:00 05454c26eb3587b56abc5eb139797ac5afb6d77a Following files contains code that is common to all intel mid soc's. So renamed them as below. mrst/mrst.c -> intel-mid/intel-mid.c mrst/vrtc.c -> intel-mid/intel_mid_vrtc.c mrst/early_printk_mrst.c -> intel-mid/intel_mid_vrtc.c pci/mrst.c -> pci/intel_mid_pci.c Also, renamed the corresponding header files and made changes to the driver files that included these header files. To ensure that there are no functional changes, I have compared the objdump of renamed files before and after rename and found that the only difference is file name change. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Link: http://lkml.kernel.org/r/1382049336-21316-4-git-send-email-david.a.cohen@linux.intel.com Signed-off-by: David Cohen <david.a.cohen@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> 
Following files contains code that is common to all intel mid
soc's. So renamed them as below.

mrst/mrst.c              -> intel-mid/intel-mid.c
mrst/vrtc.c              -> intel-mid/intel_mid_vrtc.c
mrst/early_printk_mrst.c -> intel-mid/intel_mid_vrtc.c
pci/mrst.c               -> pci/intel_mid_pci.c

Also, renamed the corresponding header files and made changes
to the driver files that included these header files.

To ensure that there are no functional changes, I have compared
the objdump of renamed files before and after rename and found
that the only difference is file name change.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: http://lkml.kernel.org/r/1382049336-21316-4-git-send-email-david.a.cohen@linux.intel.com
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
x86: Increase precision of x86_platform.get/set_wallclock() 2013-05-28T21:00:59+00:00 David Vrabel david.vrabel@citrix.com 2013-05-13T17:56:06+00:00 3565184ed0c1ea46bea5b792da5f72a83c43e49b All the virtualized platforms (KVM, lguest and Xen) have persistent wallclocks that have more than one second of precision. read_persistent_wallclock() and update_persistent_wallclock() allow for nanosecond precision but their implementation on x86 with x86_platform.get/set_wallclock() only allows for one second precision. This means guests may see a wallclock time that is off by up to 1 second. Make set_wallclock() and get_wallclock() take a struct timespec parameter (which allows for nanosecond precision) so KVM and Xen guests may start with a more accurate wallclock time and a Xen dom0 can maintain a more accurate wallclock for guests. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: John Stultz <john.stultz@linaro.org> 
All the virtualized platforms (KVM, lguest and Xen) have persistent
wallclocks that have more than one second of precision.

read_persistent_wallclock() and update_persistent_wallclock() allow
for nanosecond precision but their implementation on x86 with
x86_platform.get/set_wallclock() only allows for one second precision.
This means guests may see a wallclock time that is off by up to 1
second.

Make set_wallclock() and get_wallclock() take a struct timespec
parameter (which allows for nanosecond precision) so KVM and Xen
guests may start with a more accurate wallclock time and a Xen dom0
can maintain a more accurate wallclock for guests.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
x86: Do full rtc synchronization with ntp 2013-03-15T23:50:26+00:00 Prarit Bhargava prarit@redhat.com 2013-02-14T17:02:54+00:00 3195ef59cb42cda3aeeb24a7fd2ba1b900c4a3cc Every 11 minutes ntp attempts to update the x86 rtc with the current system time. Currently, the x86 code only updates the rtc if the system time is within +/-15 minutes of the current value of the rtc. This was done originally to avoid setting the RTC if the RTC was in localtime mode (common with Windows dualbooting). Other architectures do a full synchronization and now that we have better infrastructure to detect when the RTC is in localtime, there is no reason that x86 should be software limited to a 30 minute window. This patch changes the behavior of the kernel to do a full synchronization (year, month, day, hour, minute, and second) of the rtc when ntp requests a synchronization between the system time and the rtc. I've used the RTC library functions in this patchset as they do all the required bounds checking. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: x86@kernel.org Cc: Matt Fleming <matt.fleming@intel.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: linux-efi@vger.kernel.org Signed-off-by: Prarit Bhargava <prarit@redhat.com> [jstultz: Tweak commit message, fold in build fix found by fengguang Also add select RTC_LIB to X86, per new dependency, as found by prarit] Signed-off-by: John Stultz <john.stultz@linaro.org> 
Every 11 minutes ntp attempts to update the x86 rtc with the current
system time.  Currently, the x86 code only updates the rtc if the system
time is within +/-15 minutes of the current value of the rtc. This
was done originally to avoid setting the RTC if the RTC was in localtime
mode (common with Windows dualbooting).  Other architectures do a full
synchronization and now that we have better infrastructure to detect
when the RTC is in localtime, there is no reason that x86 should be
software limited to a 30 minute window.

This patch changes the behavior of the kernel to do a full synchronization
(year, month, day, hour, minute, and second) of the rtc when ntp requests
a synchronization between the system time and the rtc.

I've used the RTC library functions in this patchset as they do all the
required bounds checking.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: x86@kernel.org
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: linux-efi@vger.kernel.org
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
[jstultz: Tweak commit message, fold in build fix found by fengguang
Also add select RTC_LIB to X86, per new dependency, as found by prarit]
Signed-off-by: John Stultz <john.stultz@linaro.org>
x86/time/rtc: Don't print extended CMOS year when reading RTC 2013-01-24T13:56:35+00:00 Bjorn Helgaas bhelgaas@google.com 2013-01-04T22:41:47+00:00 6125bc8b86d9da75ddac77e38f41afbf9f5de3e3 We shouldn't print the current century every time we read the RTC. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20130104224146.15189.14874.stgit@bhelgaas.mtv.corp.google.com Signed-off-by: Ingo Molnar <mingo@kernel.org> 
We shouldn't print the current century every time we read the
RTC.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20130104224146.15189.14874.stgit@bhelgaas.mtv.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
x86: Allow tracing of functions in arch/x86/kernel/rtc.c 2012-10-24T11:14:22+00:00 David Vrabel david.vrabel@citrix.com 2012-10-08T12:07:30+00:00 ce37f400336a34bb6e72c4700f9dcc2a41ff7163 Move native_read_tsc() to tsc.c to allow profiling to be re-enabled for rtc.c. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1349698050-6560-1-git-send-email-david.vrabel@citrix.com Signed-off-by: Ingo Molnar <mingo@kernel.org> 
Move native_read_tsc() to tsc.c to allow profiling to be
re-enabled for rtc.c.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1349698050-6560-1-git-send-email-david.vrabel@citrix.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
sections: fix section conflicts in arch/x86 2012-10-05T18:04:40+00:00 Andi Kleen ak@linux.intel.com 2012-10-05T00:11:42+00:00 75fdd155eaf755aa183ca9844a9a178b7a0e3959 Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
x86/rtc, mrst: Don't register a platform RTC device for for Intel MID platforms 2011-12-05T16:09:21+00:00 Mathias Nyman mathias.nyman@linux.intel.com 2011-11-15T22:46:52+00:00 35d476996288af6a4aaa8b172bcd31decd233de7 Intel MID x86 platforms have a memory mapped virtual RTC instead. No MID platform have the default ports (and accessing them may do weird stuff). Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Cc: feng.tang@intel.com Cc: Feng Tang <feng.tang@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> 
Intel MID x86 platforms have a memory mapped virtual RTC
instead.  No MID platform have the default ports (and
accessing them may do weird stuff).

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: feng.tang@intel.com
Cc: Feng Tang <feng.tang@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>