1. 13 11月, 2012 2 次提交
    • J
      ARM: OMAP3+: Implement timer workaround for errata i103 and i767 · bfd6d021
      Jon Hunter 提交于
      Errata Titles:
      i103: Delay needed to read some GP timer, WD timer and sync timer
            registers after wakeup (OMAP3/4)
      i767: Delay needed to read some GP timer registers after wakeup (OMAP5)
      
      Description (i103/i767):
      If a General Purpose Timer (GPTimer) is in posted mode
      (TSICR [2].POSTED=1), due to internal resynchronizations, values read in
      TCRR, TCAR1 and TCAR2 registers right after the timer interface clock
      (L4) goes from stopped to active may not return the expected values. The
      most common event leading to this situation occurs upon wake up from
      idle.
      
      GPTimer non-posted synchronization mode is not impacted by this
      limitation.
      
      Workarounds:
      1). Disable posted mode
      2). Use static dependency between timer clock domain and MPUSS clock
          domain
      3). Use no-idle mode when the timer is active
      
      Workarounds #2 and #3 are not pratical from a power standpoint and so
      workaround #1 has been implemented. Disabling posted mode adds some CPU
      overhead for configuring and reading the timers as the CPU has to wait
      for accesses to be re-synchronised within the timer. However, disabling
      posted mode guarantees correct operation.
      
      Please note that it is safe to use posted mode for timers if the counter
      (TCRR) and capture (TCARx) registers will never be read. An example of
      this is the clock-event system timer. This is used by the kernel to
      schedule events however, the timers counter is never read and capture
      registers are not used. Given that the kernel configures this timer
      often yet never reads the counter register it is safe to enable posted
      mode in this case. Hence, for the timer used for kernel clock-events,
      posted mode is enabled by overriding the errata for devices that are
      impacted by this defect.
      
      For drivers using the timers that do not read the counter or capture
      registers and wish to use posted mode, can override the errata and
      enable posted mode by making the following function calls.
      
      	__omap_dm_timer_override_errata(timer, OMAP_TIMER_ERRATA_I103_I767);
      	__omap_dm_timer_enable_posted(timer);
      
      Both dmtimers and watchdogs are impacted by this defect this patch only
      implements the workaround for the dmtimer. Currently the watchdog driver
      does not read the counter register and so no workaround is necessary.
      
      Posted mode will be disabled for all OMAP2+ devices (including AM33xx)
      using a GP timer as a clock-source timer to guarantee correct operation.
      This is not necessary for OMAP24xx devices but the default clock-source
      timer for OMAP24xx devices is the 32k-sync timer and not the GP timer
      and so should not have any impact. This should be re-visited for future
      devices if this errata is fixed.
      
      Confirmed with Vaibhav Hiremath that this bug also impacts AM33xx
      devices.
      Signed-off-by: NJon Hunter <jon-hunter@ti.com>
      Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
      bfd6d021
    • J
      ARM: OMAP: Add DMTIMER definitions for posted mode · 971d0254
      Jon Hunter 提交于
      For OMAP2+ devices, when using DMTIMERs for system timers (clock-events and
      clock-source) the posted mode configuration of the timers is used. To allow
      the compiler to optimise the functions for configuring and reading the system
      timers, the posted flag variable is hard-coded with the value 1. To make it
      clear that posted mode is being used add some definitions so that it is more
      readable.
      Signed-off-by: NJon Hunter <jon-hunter@ti.com>
      Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
      971d0254
  2. 10 11月, 2012 4 次提交
  3. 07 11月, 2012 7 次提交
  4. 06 11月, 2012 14 次提交
  5. 05 11月, 2012 1 次提交
  6. 04 11月, 2012 4 次提交
    • L
      Merge tag 'nfs-for-3.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · d4164973
      Linus Torvalds 提交于
      Pull NFS client bugfixes from Trond Myklebust:
      
       - Fix a bunch of deadlock situations:
         * State recovery can deadlock if we fail to release sequence ids
           before scheduling the recovery thread.
         * Calling deactivate_super() from an RPC workqueue thread can
           deadlock because of the call to rpc_shutdown_client.
      
       - Display the device name correctly in /proc/*/mounts
      
       - Fix a number of incorrect error return values:
         * When NFSv3 mounts fail due to a timeout.
         * On NFSv4.1 backchannel setup failure
         * On NFSv4 open access checks
      
       - pnfs_find_alloc_layout() must check the layout pointer for NULL
      
       - Fix a regression in the legacy DNS resolved
      
      * tag 'nfs-for-3.7-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        NFS4: nfs4_opendata_access should return errno
        NFSv4: Initialise the NFSv4.1 slot table highest_used_slotid correctly
        SUNRPC: return proper errno from backchannel_rqst
        NFS: add nfs_sb_deactive_async to avoid deadlock
        nfs: Show original device name verbatim in /proc/*/mount{s,info}
        nfsv3: Make v3 mounts fail with ETIMEDOUTs instead EIO on mountd timeouts
        nfs: Check whether a layout pointer is NULL before free it
        NFS: fix bug in legacy DNS resolver.
        NFSv4: nfs4_locku_done must release the sequence id
        NFSv4.1: We must release the sequence id when we fail to get a session slot
        NFS: Wait for session recovery to finish before returning
      d4164973
    • L
      Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 225ff868
      Linus Torvalds 提交于
      Pull thermal management & ACPI update from Zhang Rui,
      
      Ho humm.  Normally these things go through Len.  But it's just three
      small fixes, I guess I can pull directly too.
      
      * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        exynos4_tmu_driver_ids should be exynos_tmu_driver_ids.
        ACPI video: Ignore errors after _DOD evaluation.
        thermal: solve compilation errors in rcar_thermal
      225ff868
    • L
      Merge branch 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux · 209c510e
      Linus Torvalds 提交于
      Pull i2c embedded fixes from Wolfram Sang:
       "Two patches are usual stuff.
      
        The bigger patch is needed to correct a wrong decision made in this
        merge window.  We hoped to get the PIOQUEUE mode in the mxs driver
        working with DMA, but it turned out to be too broken (leading to data
        loss), so we now think it is best to remove it entirely and work only
        with DMA now.  The patch should be in 3.7.  IMO, so users never get
        the chance to use both modes in parallel."
      
      * 'i2c-embedded/for-current' of git://git.pengutronix.de/git/wsa/linux:
        i2c: tegra: set irq name as device name
        i2c-nomadik: Fixup clock handling
        i2c: mxs: remove broken PIOQUEUE support
      209c510e
    • L
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 53f9313f
      Linus Torvalds 提交于
      Pull drm fixes from Dave Airlie:
       "Scattered selection of fixes:
      
         - radeon: load detect fixes from SuSE/AMD
         - intel: misc i830, sdvo regression, vesafb kickoff ums fix
         - exynos: maintainers entry update + fixes
         - udl: fix stride scanout issue
      
        it's slightly bigger than I'd probably like, but nothing looked
        dangerous enough to hold off on."
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/udl: fix stride issues scanning out stride != width*bpp
        drm/radeon: add load detection support for ext DAC on R200 (v2)
        DRM/radeon: For single CRTC GPUs move handling of CRTC_CRT_ON to crtc_dpms().
        DRM/Radeon: Fix TV DAC Load Detection for single CRTC chips.
        DRM/Radeon: Clean up code in TV DAC load detection.
        drm/radeon: fix ATPX function documentation
        drivers/gpu/drm/radeon/evergreen_cs.c: Remove unnecessary semicolon
        DRM/Radeon: On DVI-I use Load Detection when EDID is bogus.
        DRM/Radeon: Fix primary DAC Load Detection for RV100 chips.
        DRM/Radeon: Fix Load Detection on legacy primary DAC.
        drm: exynos: removed warning due to missing typecast for mixer driver data
        drm/exynos: add support for ARCH_MULTIPLATFORM
        MAINTAINERS: Add git repository for Exynos DRM
        drm/exynos: fix display on issue
        drm/i915: Only kick out vesafb if we takeover the fbcon with KMS
        drm/i915: be less verbose about inability to provide vendor backlight
        drm/i915: clear the entire sdvo infoframe buffer
        drm/i915: VGA needs to be on pipe A on i830M
        drm/i915: fix overlay on i830M
      53f9313f
  7. 03 11月, 2012 8 次提交