1. 07 5月, 2007 2 次提交
  2. 02 5月, 2007 2 次提交
    • J
      [POWERPC] Fix suspend states again · be9c94dd
      Johannes Berg 提交于
      In commit 0fba3a1f (a very long time ago,
      May 2006), I fixed a bug that caused powermacs to crash when you tried
      entering standby/mem suspend states.
      
      As I'm now getting more familiar with the suspend code I notice a few
      more things:
       1. we previously misunderstood what pm_ops is for, it isn't supposed to be
          for doing platform dependent suspend/resume stuff that needs to be done
          for suspend to disk (as we currently try to use it!), it is instead for
          entering platform dependent suspend states ("standby", "mem").
       2. due to the first point, we never properly save FPU and altivec states
          when suspending to disk. It probably hasn't hurt yet because the process
          that writes the "disk" to /sys/power/state uses neither and its context
          is used.
      
      This patch addresses these points as follows:
       1. remove all pm_ops from powermac, powermac suspend to ram isn't currently
          usable via /sys/power/state but is done via the PMU instead.
       2. move the code responsible for storing FPU/altivec state into
          save_processor_state and the set_context() call to restore_processor_state.
       3. add a call to kernel_enable_spe()
      
      It may look like there is some code removal missing but that is
      actually because the new suspend.h file overrides the ppc/suspend.h
      one which was previously used.
      Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      be9c94dd
    • J
      [POWERPC] powermac: Fix G5-cpufreq for cpu on/offline · 8fce6dd2
      Johannes Berg 提交于
      The original code here is wrong, it applies "previous" knowledge.
      The way the cpufreq core is designed is that the policy for the
      secondary CPU that comes online says that it must in fact not
      use this policy but use the same as the other CPUs that are
      listed, which in fact is CPU#0.
      Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
      Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      8fce6dd2
  3. 27 4月, 2007 1 次提交
  4. 24 4月, 2007 4 次提交
  5. 13 4月, 2007 3 次提交
  6. 26 3月, 2007 1 次提交
  7. 22 3月, 2007 1 次提交
  8. 08 3月, 2007 2 次提交
  9. 20 2月, 2007 2 次提交
    • R
      backlight: Separate backlight properties from backlight ops pointers · 599a52d1
      Richard Purdie 提交于
      Per device data such as brightness belongs to the indivdual device
      and should therefore be separate from the the backlight operation
      function pointers. This patch splits the two types of data and
      allows simplifcation of some code.
      Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>
      599a52d1
    • R
      backlight: Fix external uses of backlight internal semaphore · 28ee086d
      Richard Purdie 提交于
      backlight_device->sem has a very specific use as documented in the
      header file. The external users of this are using it for a different
      reason, to serialise access to the update_status() method.
      
      backlight users were supposed to implement their own internal
      serialisation of update_status() if needed but everyone is doing
      things differently and incorrectly. Therefore add a global mutex to
      take care of serialisation for everyone, once and for all.
      
      Locking for get_brightness remains optional since most users don't
      need it.
      
      Also update the lcd class in a similar way.
      Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>
      28ee086d
  10. 17 2月, 2007 1 次提交
  11. 13 2月, 2007 1 次提交
  12. 07 2月, 2007 1 次提交
  13. 06 12月, 2006 1 次提交
  14. 04 12月, 2006 3 次提交
    • B
      [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h · 68a64357
      Benjamin Herrenschmidt 提交于
      powerpc: Merge 32 and 64 bits asm-powerpc/io.h
      
      The rework on io.h done for the new hookable accessors made it easier,
      so I just finished the work and merged 32 and 64 bits io.h for arch/powerpc.
      
      arch/ppc still uses the old version in asm-ppc, there is just too much gunk
      in there that I really can't be bothered trying to cleanup.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      68a64357
    • B
      [POWERPC] Souped-up of_platform_device support · 7eebde70
      Benjamin Herrenschmidt 提交于
      This patch first splits of_device.c and of_platform.c, the later containing
      the bits relative to of_platform_device's. On the "breaks" side of things,
      drivers uisng of_platform_device(s) need to include asm/of_platform.h now
      and of_(un)register_driver is now of_(un)register_platform_driver.
      
      In addition to a few utility functions to locate of_platform_device(s),
      the main new addition is of_platform_bus_probe() which allows the platform
      code to trigger an automatic creation of of_platform_devices for a whole
      tree of devices.
      
      The function acts based on the type of the various "parent" devices encountered
      from a provided root, using either a default known list of bus types that can be
      "probed" or a passed-in list. It will only register devices on busses matching
      that list, which mean that typically, it will not register PCI devices, as
      expected (since they will be picked up by the PCI layer).
      
      This will be used by Cell platforms using 4xx-type IOs in the Axon bridge
      and can be used by any embedded-type device as well.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      7eebde70
    • B
      [POWERPC] Make pci_read_irq_line the default · f90bb153
      Benjamin Herrenschmidt 提交于
      This patch reworks the way IRQs are fixed up on PCI for arch powerpc.
      
      It makes pci_read_irq_line() called by default in the PCI code for
      devices that are probed, and add an optional per-device fixup in
      ppc_md for platforms that really need to correct what they obtain
      from pci_read_irq_line().
      
      It also removes ppc_md.irq_bus_setup which was only used by pSeries
      and should not be needed anymore.
      
      I've also removed the pSeries s7a workaround as it can't work with
      the current interrupt code anyway. I'm trying to get one of these
      machines working so I can test a proper fix for that problem.
      
      I also haven't updated the old-style fixup code from 85xx_cds.c
      because it's actually buggy :) It assigns pci_dev->irq hard coded
      numbers which is no good with the new IRQ mapping code. It should
      at least use irq_create_mapping(NULL, hard_coded_number); and possibly
      also set_irq_type() to set them as level low.
      Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f90bb153
  15. 02 12月, 2006 1 次提交
  16. 13 11月, 2006 2 次提交
  17. 23 10月, 2006 1 次提交
  18. 10 10月, 2006 1 次提交
    • P
      [POWERPC] Fix secondary CPU startup on old "powersurge" SMP powermacs · d6a29252
      Paul Mackerras 提交于
      On the old "powersurge" SMP powermacs, the second CPU is started up
      by sending it an IPI, which has the side effect of stopping the
      timebase clock (so the secondary CPU's timebase can be synchronized
      with the primary's).  The routine that did this used udelay, which
      will hang forever when the timebase is stopped, since udelay now spins
      until the timebase reaches a certain value.
      
      The end result is that the kernel would hang when bringing up the
      second CPU.  This fixes it by using a simple loop which just does a
      fixed number of iterations to generate the delay.  These old systems
      were all clocked at around 200 MHz or so, so a fixed number of
      iterations is acceptable.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      d6a29252
  19. 07 10月, 2006 1 次提交
  20. 06 10月, 2006 1 次提交
  21. 05 10月, 2006 1 次提交
    • D
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      David Howells 提交于
      Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
      of passing regs around manually through all ~1800 interrupt handlers in the
      Linux kernel.
      
      The regs pointer is used in few places, but it potentially costs both stack
      space and code to pass it around.  On the FRV arch, removing the regs parameter
      from all the genirq function results in a 20% speed up of the IRQ exit path
      (ie: from leaving timer_interrupt() to leaving do_IRQ()).
      
      Where appropriate, an arch may override the generic storage facility and do
      something different with the variable.  On FRV, for instance, the address is
      maintained in GR28 at all times inside the kernel as part of general exception
      handling.
      
      Having looked over the code, it appears that the parameter may be handed down
      through up to twenty or so layers of functions.  Consider a USB character
      device attached to a USB hub, attached to a USB controller that posts its
      interrupts through a cascaded auxiliary interrupt controller.  A character
      device driver may want to pass regs to the sysrq handler through the input
      layer which adds another few layers of parameter passing.
      
      I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
      main part of the code on FRV and i386, though I can't test most of the drivers.
      I've also done partial conversion for powerpc and MIPS - these at least compile
      with minimal configurations.
      
      This will affect all archs.  Mostly the changes should be relatively easy.
      Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
      
      	struct pt_regs *old_regs = set_irq_regs(regs);
      
      And put the old one back at the end:
      
      	set_irq_regs(old_regs);
      
      Don't pass regs through to generic_handle_irq() or __do_IRQ().
      
      In timer_interrupt(), this sort of change will be necessary:
      
      	-	update_process_times(user_mode(regs));
      	-	profile_tick(CPU_PROFILING, regs);
      	+	update_process_times(user_mode(get_irq_regs()));
      	+	profile_tick(CPU_PROFILING);
      
      I'd like to move update_process_times()'s use of get_irq_regs() into itself,
      except that i386, alone of the archs, uses something other than user_mode().
      
      Some notes on the interrupt handling in the drivers:
      
       (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
           the input_dev struct.
      
       (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
           something different depending on whether it's been supplied with a regs
           pointer or not.
      
       (*) Various IRQ handler function pointers have been moved to type
           irq_handler_t.
      Signed-Off-By: NDavid Howells <dhowells@redhat.com>
      (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  22. 04 10月, 2006 1 次提交
  23. 01 10月, 2006 1 次提交
  24. 24 9月, 2006 1 次提交
  25. 20 9月, 2006 1 次提交
  26. 04 9月, 2006 1 次提交
  27. 02 9月, 2006 1 次提交
  28. 23 8月, 2006 1 次提交