1. 03 4月, 2013 6 次提交
  2. 31 3月, 2013 1 次提交
  3. 29 3月, 2013 6 次提交
  4. 28 3月, 2013 3 次提交
  5. 27 3月, 2013 1 次提交
    • R
      ARM: OMAP: clocks: Delay clk inits atleast until slab is initialized · ff931c82
      Rajendra Nayak 提交于
      clk inits on OMAP happen quite early, even before slab is available.
      The dependency comes from the fact that the timer init code starts to
      use clocks and hwmod and we need clocks to be initialized by then.
      
      There are various problems doing clk inits this early, one is,
      not being able to do dynamic clk registrations and hence the
      dependency on clk-private.h. The other is, inability to debug
      early kernel crashes without enabling DEBUG_LL and earlyprintk.
      
      Doing early clk init also exposed another instance of a kernel
      panic due to a BUG() when CONFIG_DEBUG_SLAB is enabled.
      
      [    0.000000] Kernel BUG at c01174f8 [verbose debug info unavailable]
      [    0.000000] Internal error: Oops - BUG: 0 [#1] SMP ARM
      [    0.000000] Modules linked in:
      [    0.000000] CPU: 0    Not tainted  (3.9.0-rc1-12179-g72d48f9 #6)
      [    0.000000] PC is at __kmalloc+0x1d4/0x248
      [    0.000000] LR is at __clk_init+0x2e0/0x364
      [    0.000000] pc : [<c01174f8>]    lr : [<c0441f54>]    psr: 600001d3
      [    0.000000] sp : c076ff28  ip : c065cefc  fp : c0441f54
      [    0.000000] r10: 0000001c  r9 : 000080d0  r8 : c076ffd4
      [    0.000000] r7 : c074b578  r6 : c0794d88  r5 : 00000040  r4 : 00000000
      [    0.000000] r3 : 00000000  r2 : c07cac70  r1 : 000080d0  r0 : 0000001c
      [    0.000000] Flags: nZCv  IRQs off  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
      [    0.000000] Control: 10c53c7d  Table: 8000404a  DAC: 00000017
      [    0.000000] Process swapper (pid: 0, stack limit = 0xc076e240)
      [    0.000000] Stack: (0xc076ff28 to 0xc0770000)
      [    0.000000] ff20:                   22222222 c0794ec8 c06546e8 00000000 00000040 c0794d88
      [    0.000000] ff40: c074b578 c076ffd4 c07951c8 c076e000 00000000 c0441f54 c074b578 c076ffd4
      [    0.000000] ff60: c0793828 00000040 c0794d88 c074b578 c076ffd4 c0776900 c076e000 c07272ac
      [    0.000000] ff80: 2f800000 c074c968 c07f93d0 c0719780 c076ffa0 c076ff98 00000000 00000000
      [    0.000000] ffa0: 00000000 00000000 00000000 00000001 c074cd6c c077b1ec 8000406a c0715724
      [    0.000000] ffc0: 00000000 00000000 00000000 00000000 00000000 c074c968 10c53c7d c0776974
      [    0.000000] ffe0: c074cd6c c077b1ec 8000406a 411fc092 00000000 80008074 00000000 00000000
      [    0.000000] [<c01174f8>] (__kmalloc+0x1d4/0x248) from [<c0441f54>] (__clk_init+0x2e0/0x364)
      [    0.000000] [<c0441f54>] (__clk_init+0x2e0/0x364) from [<c07272ac>] (omap4xxx_clk_init+0xbc/0x140)
      [    0.000000] [<c07272ac>] (omap4xxx_clk_init+0xbc/0x140) from [<c0719780>] (setup_arch+0x15c/0x284)
      [    0.000000] [<c0719780>] (setup_arch+0x15c/0x284) from [<c0715724>] (start_kernel+0x7c/0x334)
      [    0.000000] [<c0715724>] (start_kernel+0x7c/0x334) from [<80008074>] (0x80008074)
      [    0.000000] Code: e5883004 e1a00006 e28dd00c e8bd8ff0 (e7f001f2)
      [    0.000000] ---[ end trace 1b75b31a2719ed1c ]---
      [    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
      
      It was a know issue, that slab allocations would fail when common
      clock core tries to cache parent pointers for mux clocks on OMAP,
      and hence a patch 'clk: Allow late cache allocation for clk->parents,
      commit 7975059d' was added to work this problem around.
      A BUG() within kmalloc() with CONFIG_DEBUG_SLAB enabled was completely
      overlooked causing this regression.
      
      More details on the issue reported can be found here,
      http://www.mail-archive.com/linux-omap@vger.kernel.org/msg85932.html
      
      With all these issues around clk inits happening way too early, it
      makes sense to at least move them to a point where dynamic memory
      allocations are possible. So move them to a point just before the
      timer code starts using clocks and hwmod.
      
      This should at least pave way for clk inits on OMAP moving to dynamic
      clock registrations instead of using the static macros defined in
      clk-private.h.
      
      The issue with kernel panic while CONFIG_DEBUG_SLAB is enabled
      was reported by Piotr Haber and Tony Lindgren and this patch
      fixes the reported issue as well.
      Reported-by: NPiotr Haber <phaber@broadcom.com>
      Reported-by: NTony Lindgren <tony@atomide.com>
      Signed-off-by: NRajendra Nayak <rnayak@ti.com>
      Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
      Reviewed-by: NMike Turquette <mturquette@linaro.org>
      Acked-by: NPaul Walmsley <paul@pwsan.com>
      Cc: stable@vger.kernel.org  # v3.8
      Signed-off-by: NTony Lindgren <tony@atomide.com>
      ff931c82
  6. 26 3月, 2013 1 次提交
    • S
      ARM: imx: fix sync issue between imx_cpu_die and imx_cpu_kill · 2f3edfd7
      Shawn Guo 提交于
      There is a sync issue with hotplug operation.  It's possible that when
      imx_cpu_kill gets running on primary core, the imx_cpu_die execution
      on the core which is to be killed hasn't been finished yet.  The problem
      will very likely be hit when running suspend without no_console_suspend
      setting on kernel cmdline.
      
      It uses cpu jumping argument register to sync imx_cpu_die and
      imx_cpu_kill.  The register will be set in imx_cpu_die and imx_cpu_kill
      will wait for the register being cleared to actually kill the cpu.
      Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
      Cc: <stable@vger.kernel.org>
      2f3edfd7
  7. 23 3月, 2013 7 次提交
  8. 19 3月, 2013 2 次提交
    • S
      ARM: imx: add dependency check for DEBUG_IMX_UART_PORT · 287939a3
      Shawn Guo 提交于
      While adding i.MX DEBUG_LL selection, commit f8c95fe6 (ARM: imx: support
      DEBUG_LL uart port selection for all i.MX SoCs) leaves Kconfig symbol
      DEBUG_IMX_UART_PORT there without any dependency check.  This results in
      that everyone gets the symbol in their config, which is someting
      undesirable.  Add "depends on ARCH_MXC" for the symbol to prevent that.
      Reported-by: NKarl Beldan <karl.beldan@gmail.com>
      Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
      287939a3
    • M
      ARM: video: mxs: Fix mxsfb misconfiguring VDCTRL0 · 6a15075e
      Marek Vasut 提交于
      The issue fixed by this patch manifests only then using X11
      with mxsfb driver. The X11 will display either shifted image
      or otherwise distorted image on the LCD.
      
      The problem is that the X11 tries to reconfigure the framebuffer
      and along the way calls fb_ops.fb_set_par() with X11's desired
      configuration values. The field of particular interest is
      fb_info->var.sync which contains non-standard values if
      configured by kernel. These are either FB_SYNC_DATA_ENABLE_HIGH_ACT,
      FB_SYNC_DOTCLK_FAILING_ACT or both, depending on the platform
      configuration. Both of these values are defined in the
      include/linux/mxsfb.h file.
      
      The driver interprets these values and configures the LCD controller
      accordingly. Yet X11 only has access to the standard values for this
      field defined in include/uapi/linux/fb.h and thus, unlike kernel,
      omits these special values. This results in distorted image on the
      LCD.
      
      This patch moves these non-standard values into new field of the
      mxsfb_platform_data structure so the driver can in turn check this
      field instead of the video mode field for these specific portions.
      
      Moreover, this patch prefixes these values with MXSFB_SYNC_ prefix
      instead of FB_SYNC_ prefix to prevent confusion of subsequent users.
      Signed-off-by: NMarek Vasut <marex@denx.de>
      Cc: Fabio Estevam <fabio.estevam@freescale.com>
      Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>
      Cc: Linux FBDEV <linux-fbdev@vger.kernel.org>
      Cc: Lothar Waßmann <LW@karo-electronics.de>
      Cc: Sascha Hauer <kernel@pengutronix.de>
      Tested-by: NFabio Estevam <fabio.estevam@freescale.com>
      Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
      6a15075e
  9. 18 3月, 2013 2 次提交
    • A
      ARM: fix CONFIG_VIRT_TO_BUS handling · b4811bac
      Arnd Bergmann 提交于
      887cbce0 "arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS"
      and  4febd95a "Select VIRT_TO_BUS directly where needed" from
      Stephen Rothwell changed globally how CONFIG_VIRT_TO_BUS is
      selected, while my own a5d533ee "ARM: disable virt_to_bus/
      virt_to_bus almost everywhere" was merged at the same time and
      changed which platforms select it on ARM.
      
      The result of this conflict was that we again see CONFIG_VIRT_TO_BUS
      on all ARM systems. This patch fixes up the problem and removes
      CONFIG_ARCH_NO_VIRT_TO_BUS again on ARM.
      Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      b4811bac
    • H
      ARM: ep93xx: Fix wait for UART FIFO to be empty · 605c357b
      H Hartley Sweeten 提交于
      Commit 210dce5f "ARM: ep93xx: properly wait for UART FIFO to be empty"
      
      Removed the timeout loop while waiting for the uart transmit fifo to
      empty. Some bootloaders leave the uart in a state where there might
      be bytes in the uart that are not transmitted when execution is handed
      over to the kernel. This results in a deadlocked system while waiting
      for the fifo to empty.
      
      Add back the timeout wait to prevent the deadlock.
      
      Increase the wait time to hopefully prevent the decompressor corruption
      that lead to commit 210dce5f. This corruption was probably due to a
      slow uart baudrate. The 10* increase in the wait time should be enough
      for all cases.
      Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
      Acked-by: NFlorian Fainelli <florian@openwrt.org>
      Signed-off-by: NRyan Mallon <rmallon@gmail.com>
      605c357b
  10. 16 3月, 2013 1 次提交
  11. 15 3月, 2013 4 次提交
    • S
      ARM: i.MX35: enable MAX clock · 5dc2eb7d
      Sascha Hauer 提交于
      The i.MX35 has two bits per clock gate which are decoded as follows:
            0b00 -> clock off
            0b01 -> clock is on in run mode, off in wait/doze
            0b10 -> clock is on in run/wait mode, off in doze
            0b11 -> clock is always on
      
      The reset value for the MAX clock is 0b10.
      
      The MAX clock is needed by the SoC, yet unused in the Kernel, so the
      common clock framework will disable it during late init time. It will
      only disable clocks though which it detects as being turned on. This
      detection is made depending on the lower bit of the gate. If the reset
      value has been altered by the bootloader to 0b11 the clock framework
      will detect the clock as turned on, yet unused, hence it will turn it
      off and the system locks up.
      
      This patch turns the MAX clock on unconditionally making the Kernel
      independent of the bootloader.
      Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
      5dc2eb7d
    • S
      ARM: Scorpion is a v7 architecture, not v6 · 8dda05cc
      Stephen Boyd 提交于
      Scorpion processors have always been v7 CPUs. Fix the Kconfig
      text to reflect this.
      Reported-by: NStepan Moskovchenko <stepanm@codeaurora.org>
      Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
      Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      8dda05cc
    • H
      ARM: mmp: add platform_device head file in gplugd · e71dc5f7
      Haojian Zhuang 提交于
      arch/arm/mach-mmp/gplugd.c: In function ‘gplugd_init’:
      arch/arm/mach-mmp/gplugd.c:188:2: error: implicit declaration of
      function ‘platform_device_register’
      [-Werror=implicit-function-declaration]
      cc1: some warnings being treated as errors
      make[1]: *** [arch/arm/mach-mmp/gplugd.o] Error 1
      make: *** [arch/arm/mach-mmp] Error 2
      
      So append platform_device.h to resolve build issue.
      Signed-off-by: NHaojian Zhuang <haojian.zhuang@linaro.org>
      e71dc5f7
    • A
      [media] s5p-fimc: fix s5pv210 build · 01ffe957
      Arnd Bergmann 提交于
      56bc911a "[media] s5p-fimc: Redefine platform data structure for fimc-is"
      changed the bus_type member of struct fimc_source_info treewide, but
      got one instance wrong in mach-s5pv210, which was evidently not
      even build tested.
      
      This adds the missing change to get s5pv210_defconfig to build again.
      Applies on the Mauro's media tree.
      Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
      Cc: Kyungmin Park <kyungmin.park@samsung.com>
      Cc: Kukjin Kim <kgene.kim@samsung.com>
      Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
      01ffe957
  12. 14 3月, 2013 4 次提交
  13. 13 3月, 2013 2 次提交
    • P
      ARM: OMAP4: PM: fix PM regression introduced by recent clock cleanup · 92702df3
      Paul Walmsley 提交于
      Commit 17b7e7d3 ("ARM: OMAP4:
      clock/hwmod data: start to remove some IP block control "clocks"")
      introduced a regression preventing the L3INIT clockdomain of OMAP4
      systems from entering idle.  This in turn prevented these systems from
      entering full chip clock-stop.
      
      The regression was caused by the incorrect removal of a so-called
      "optional functional clock" from the OMAP4 clock data.  This wasn't
      caught for two reasons.  First, I missed the retention entry failure
      in the branch test logs:
      
      http://www.pwsan.com/omap/testlogs/cleanup_a_3.9/20130126014242/pm/4460pandaes/4460pandaes_log.txt
      
      Second, the integration data for the OCP2SCP PHY IP block, added by
      commit 0c668875 ("ARM: OMAP4: hwmod
      data: add remaining USB-related IP blocks"), should have associated this
      clock with the IP block, but did not.
      
      Fix by adding back the so-called "optional" functional clock to the
      clock data, and by linking that clock to the OCP2SCP PHY IP block
      integration hwmod data.
      
      The problem patch was discovered by J, Keerthy <j-keerthy@ti.com>.
      
      Cc: Keerthy <j-keerthy@ti.com>
      Cc: Benoît Cousson <b-cousson@ti.com>
      Signed-off-by: NPaul Walmsley <paul@pwsan.com>
      92702df3
    • G
      ARM: OMAP3: hwmod data: keep MIDLEMODE in force-standby for musb · 092bc089
      Grazvydas Ignotas 提交于
      For some unknown reason, allowing hwmod to control MIDLEMODE causes
      core_pwrdm to not hit idle states for musb in DM3730 at least.
      I've verified that setting any MIDLEMODE value other than "force
      standby" before enabling the device causes subsequent suspend
      attempts to fail with core_pwrdm not entering idle states, even
      if the driver is unloaded and "force standby" is restored before
      suspend attempt. To recover from this, soft reset can be used, but
      that's not suitable solution for suspend.
      
      Keeping the register set at force standby (reset value) makes it work
      and device still functions properly, as musb has driver-controlled
      OTG_FORCESTDBY register that controls MSTANDBY signal.
      Note that TI PSP kernels also have similar workarounds.
      
      This patch also fixes HWMOD_SWSUP_MSTANDBY documentation to match the
      actual flag name.
      Signed-off-by: NGrazvydas Ignotas <notasas@gmail.com>
      Signed-off-by: NPaul Walmsley <paul@pwsan.com>
      092bc089