Skip to content
  1. Jul 25, 2012
    • Simon Baatz's avatar
      ARM: Kirkwood: Fix PHY disable clk problems · b5409430
      Simon Baatz authored 
      Commit 98d9986c

 (ARM: Kirkwood: Replace clock gating) and the fix 5fb2ce
(ARM: Kirkwood: clk_register_gate_fn: add fn assignment) introduced a custom
variant of clock gating which allows to define a function to be called
before gating the clock off.

This is used to disable the SATA and PCIe PHYs if the respective clocks
are unused after initialization.

However, of these two drivers, the SATA driver may be compiled as a module.
The driver re-enables the clocks at module init but the PHYs stay disabled.

Since the custom clock gating disabled the PHYs when gating the clock off,
it should also re-enable them when enabling the clock gate.  This is done by
adding a second function that may be used to enable the PHYs.

Signed-off-by: default avatarSimon Baatz <gmbnomis@gmail.com>
Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
      b5409430
    • Andrew Lunn's avatar
      ARM: Kirkwood: Ensure runit clock always ticks. · f479db44
      Andrew Lunn authored 
      

Marvell engineers tell us:

	It seems that many units use the RUNIT clock.
	SPI, UART, NAND, TWSI, ...
	So it's not possible to clock gate it.

Currently the SPI, NAND and TWSI driver will clk_prepaure_enable()
this clk, but since we have no idea what ... is, and turning this clk
off results in a hard lock, unconditionally enable runit.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Tested-by: default avatarSimon Baatz <gmbnomis@gmail.com>
      f479db44
  3. Jul 15, 2012
  5. Jul 14, 2012
  7. Jul 13, 2012
  9. Jul 12, 2012
    • Marek Szyprowski's avatar
      ARM: EXYNOS: register devices in 'need_restore' state for pm_domains · ebc35c72
      Marek Szyprowski authored 
      Commit ca1d72f0 ('PM / Domains: Make it possible to add devices to
inactive domains') introduced possibility to add devices to inactive
power domains and added pm_genpd_dev_need_restore() function which lets
platform core to notify power domain core that the specified device must
be restored (with its runtime_resume() callback) before first use.

This patch adds the pm_genpd_dev_need_restore() call what brings back
the suspend/resume behaviour for the client devices known from the
previous power domain driver (removed by commit 91cfbd4e

 - 'ARM:
EXYNOS: Hook up power domains to generic power domain infrastructure').
Client device drivers relay on that suspend/resume behaviour, thus this
patch fixes runtime pm operation for client devices.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
      ebc35c72
    • Marek Szyprowski's avatar
      ARM: EXYNOS: read initial state of power domain from hw registers · 76eb5567
      Marek Szyprowski authored 
      

Some bootloaders disable unused power domains to reduce power
consuption. Power domain driver can easily read the actual state from
the hardware registers instead of assuming that their initial state is
always 'on'.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
      76eb5567
    • Corey Minyard's avatar
      SH: Convert out[bwl] macros to inline functions · 44033109
      Corey Minyard authored 
      

The macros just called BUG(), but that results in unused variable
warnings all over the place, like in the IPMI driver.  The build
regression emails were annoying me, so here's the fix.  I have
not even compile tested this, but it's rather obvious.

[ port type mangled to unsigned long ]

Signed-off-by: default avatarCorey Minyard <cminyard@mvista.com>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
      44033109
    • Linus Torvalds's avatar
      Merge tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6 · 918227bb
      Linus Torvalds authored 
      Pull fbdev fixes from Florian Tobias Schandinat:
 "Two fixes for OMAPDSS by Tomi Valkeinen:
   - one to avoid warnings when runtime PM is not enabled
   - one workaround to dependancy issues during suspend/resume"

* tag 'fbdev-fixes-for-3.5-2' of git://github.com/schandinat/linux-2.6:
  OMAPDSS: fix warnings if CONFIG_PM_RUNTIME=n
  OMAPDSS: Use PM notifiers for system suspend
      918227bb
    • Linus Torvalds's avatar
      Merge branch 'akpm' (Andrew's patch-bomb) · 00c3e276
      Linus Torvalds authored 
      Merge random patches from Andrew Morton.

* Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (32 commits)
  memblock: free allocated memblock_reserved_regions later
  mm: sparse: fix usemap allocation above node descriptor section
  mm: sparse: fix section usemap placement calculation
  xtensa: fix incorrect memset
  shmem: cleanup shmem_add_to_page_cache
  shmem: fix negative rss in memcg memory.stat
  tmpfs: revert SEEK_DATA and SEEK_HOLE
  drivers/rtc/rtc-twl.c: fix threaded IRQ to use IRQF_ONESHOT
  fat: fix non-atomic NFS i_pos read
  MAINTAINERS: add OMAP CPUfreq driver to OMAP Power Management section
  sgi-xp: nested calls to spin_lock_irqsave()
  fs: ramfs: file-nommu: add SetPageUptodate()
  drivers/rtc/rtc-mxc.c: fix irq enabled interrupts warning
  mm/memory_hotplug.c: release memory resources if hotadd_new_pgdat() fails
  h8300/uaccess: add mising __clear_user()
  h8300/uaccess: remove assignment to __gu_val in unhandled case of get_user()
  h8300/time: add missing #include <asm/irq_regs.h>
  h8300/signal: fix typo "statis"
  h8300/pgtable: add missing #include <asm-generic/pgtable.h>
  drivers/rtc/rtc-ab8500.c: ensure correct probing of the AB8500 RTC when Device Tree is enabled
  ...
      00c3e276
    • Yinghai Lu's avatar
      memblock: free allocated memblock_reserved_regions later · 29f67386
      Yinghai Lu authored 
      memblock_free_reserved_regions() calls memblock_free(), but
memblock_free() would double reserved.regions too, so we could free the
old range for reserved.regions.

Also tj said there is another bug which could be related to this.

| I don't think we're saving any noticeable
| amount by doing this "free - give it to page allocator - reserve
| again" dancing.  We should just allocate regions aligned to page
| boundaries and free them later when memblock is no longer in use.

in that case, when DEBUG_PAGEALLOC, will get panic:

     memblock_free: [0x0000102febc080-0x0000102febf080] memblock_free_reserved_regions+0x37/0x39
  BUG: unable to handle kernel paging request at ffff88102febd948
  IP: [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155
  PGD 4826063 PUD cf67a067 PMD cf7fa067 PTE 800000102febd160
  Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
  CPU 0
  Pid: 0, comm: swapper Not tainted 3.5.0-rc2-next-20120614-sasha #447
  RIP: 0010:[<ffffffff836a5774>]  [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155

See the discussion at https://lkml.org/lkml/2012/6/13/469



So try to allocate with PAGE_SIZE alignment and free it later.

Reported-by: default avatarSasha Levin <levinsasha928@gmail.com>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      29f67386