1. 17 Dec, 2015 3 commits
    • Arnd Bergmann's avatar
      ARM: make default platform work for NOMMU · 70722803
      Arnd Bergmann authored
      Moving ARCH_VERSATILE into ARCH_MULTIPLATFORM means that it no longer
      works as the default target for MMU-less kernels. While we might
      want to get that working again in the future, it's also a rather
      bad default, and it makes sense to make ARM_SINGLE_V7M the default
      because that is what realistically all NOMMU users on ARM are using,
      and it actually is what gets selected by default in the absence of
      versatile in the choice statement.
      
      Related to this, 'allnoconfig' kernels fail to link with the new
      default, as they do not include a machine record:
      
      arm-linux-gnueabi-ld: no machine record defined
      
      For ARCH_MULTIPLATFORM kernels, we avoid this error by using a
      default machine descriptor that works for all trivial platforms,
      like ARCH_VIRT. The same reasoning applies for ARM_SINGLE_V7M,
      as that can also boot with empty machine descriptors both on
      qemu and on real hardware, as long as all the drivers are present.
      
      We could also follow up with a patch to remove the existing
      machine descriptors for the ARMv7M platforms, the only callback
      pointer the four platforms contain today is the armv7m_restart
      handler and we can simply make that the default for v7M with an
      add-on patch.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      70722803
    • Arnd Bergmann's avatar
      ARM: debug-ll: move DEBUG_LL_UART_EFM32 to correct Kconfig location · 06920d4e
      Arnd Bergmann authored
      I accidentally move the DEBUG_LL_UART_EFM32 option when sorting all
      other options alphanumerically, but it belongs into the same group
      as DEBUG_LL_UART_8250 and DEBUG_LL_UART_PL01X.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Fixes: 1dc93416 ("ARM: debug-ll: reorder Kconfig alphanumerically")
      06920d4e
    • Arnd Bergmann's avatar
      ARM: defconfig: use correct debug_ll settings · e45a1e18
      Arnd Bergmann authored
      The debug-ll infrastructure can be configured in two ways, either
      by selecting a platform specific debug option, or by picking one
      of the generic options (8250 or pl01x typically). For compatibility
      with multiplatform kernels, we have changed a couple of platforms
      to use the former method now when they used to use the latter.
      
      Unfortunately, this broke the defconfigs because now they still
      enable CONFIG_DEBUG_LL_UART_PL01X or CONFIG_DEBUG_LL_UART_8250,
      and we no longer configure the correct register addresses
      automatically.
      
      Embarrassingly, this was only found in linux-next when the
      defconfig builds turned up errors for multiple people, and I
      had not caught those in my own tests, which were done using
      the randconfig fixes patchset on top, and that has a workaround
      to avoid a build error when the addresses are not configured.
      
      The error was something like:
      
      .config:2010:warning: symbol value '' invalid for DEBUG_UART_PHYS
      .config:2011:warning: symbol value '' invalid for DEBUG_UART_VIRT
      
      This patch avoids the problem by removing the respective
      statements from the defconfig files. Any out of tree defconfig
      files on the platforms I have changed will have to do the same
      change or run into the build error above. Any users that have
      a full .config already set the correct DEBUG_UART_PHYS/VIRT
      addresses and do not need to change anything.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Fixes: 4db22c10 ("ARM: debug-ll: rework integrator/versatile handling")
      Fixes: f06455fa ("ARM: debug-ll: rework ep93xx handling")
      Fixes: c047f529 ("ARM: debug-ll: reorganize mvebu debug uart config")
      Fixes: 59bd4c38 ("ARM: debug-ll: rework lpc32xx handling")
      e45a1e18
  2. 15 Dec, 2015 33 commits
    • Arnd Bergmann's avatar
      Merge tag 'mvebu-soc-4.5-1' of git://git.infradead.org/linux-mvebu into next/multiplatform · 3081dc9e
      Arnd Bergmann authored
      Merge "mvebu soc for 4.5 (part 1)" from Gregory CLEMENT:
      
      - orion5x/mv78xx0 multiplatform conversion
      - legacy dove PMU support conversion
      
      * tag 'mvebu-soc-4.5-1' of git://git.infradead.org/linux-mvebu:
        ARM: dove: convert legacy dove to PMU support
        soc: dove: add legacy support to PMU driver
        ARM: orion5x: multiplatform support
        ARM: orion5x: clean up mach/*.h headers
        ARM: mv78xx0: multiplatform support
        ARM: mv78xx0: clean up mach/*.h headers
        ARM: orion: use SPARSE_IRQ everywhere
        ARM: orion: always use MULTI_IRQ_HANDLER
        ARM: orion: move watchdog setup to mach-orion5x
      
      Conflicts:
      	arch/arm/Kconfig
      	arch/arm/mach-dove/include/mach/entry-macro.S
      	arch/arm/mach-orion5x/include/mach/entry-macro.S
      3081dc9e
    • Arnd Bergmann's avatar
      Merge tag 'realview-base-armsoc-1-tag' of... · 22ba14f4
      Arnd Bergmann authored
      Merge tag 'realview-base-armsoc-1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator into next/multiplatform
      
      Merge "Realview multiplatform support" from Linus Walleij:
      
      The board and infrastructure changes for RealView
      multiplatform and extended DT support.
      
      * tag 'realview-base-armsoc-1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator:
        ARM: realview: add an DT SMP boot method
        ARM: realview: select SP810 and ICST for the DT variant
        soc: versatile: add support for the PB11MPCore
        clk: versatile-icst: add device tree support
        clk: versatile-icst: refactor to allocate regmap separately
        clk: versatile-icst: convert to use regmap
        ARM: realview: remove private barrier implementation
        ARM: no longer force unbuffered DMA for realview
        clk/realview: stop using machine headers
        ARM: realview: don't map undefined PCI registers
        ARM: realview: remove sparsemem hack
      
      Conflicts:
      	drivers/clk/versatile/Kconfig
      22ba14f4
    • Arnd Bergmann's avatar
      Merge branch 'versatile/multiplatform' into next/multiplatform · 7379d96b
      Arnd Bergmann authored
      Merge "ARM Versatile multi-platform support" from Rob Herring:
      
      Arnd lit a fire under me to dust this off and get it merged. So here it
      is. The main change from prior version is I merged all the code to a
      single file. It's a bigger patch than I'd like, but I don't think trying
      to do it in multiple steps is worth it.
      
      This is dependent on some solution for the default platform choice on
      !MMU builds (allnoconfig) as it can't be Versatile after this series.
      Arnd has some ideas on how to address that.
      
      This is tested under QEMU. Linus previously tested this on actual h/w
      and had a problem with the display identification which needs
      investigation or agreement to worry about it if and when someone
      actually cares.
      
      * versatile/multiplatform:
        ARM: versatile: convert to multi-platform
        ARM: versatile: merge mach code into a single file
        ARM: versatile: switch to DT only booting and remove legacy code
        ARM: versatile: add DT based PCI detection
      Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      7379d96b
    • Rob Herring's avatar
      ARM: versatile: convert to multi-platform · a29da136
      Rob Herring authored
      Now that all the prerequisites are in place, we can enable Versatile
      boards for multi-platform kernels.
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      a29da136
    • Rob Herring's avatar
      ARM: versatile: merge mach code into a single file · a7096789
      Rob Herring authored
      With DT-only support now in place and most of the legacy code removed,
      the separation of core.c and versatile_dt.c makes little sense. The
      headers in mach include directory also have to move for multi-platform
      support, but with a single .c file the remaining definitions needed can
      also be moved into the versatile_dt.c.
      
      In the move, the system registers and IB2 registers are converted to
      run-time mappings and all register accesses converted to use
      readl/writel.
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      a7096789
    • Rob Herring's avatar
      ARM: versatile: switch to DT only booting and remove legacy code · 16956fed
      Rob Herring authored
      With DT support for clocks, irqchips, timers, and PCI now in place, DT
      based booting has feature parity with non-DT legacy boot. The final
      piece is actually enabling common clock support on Versatile. Enabling
      full DT support requires either removing the old Versatile clock code,
      updating the legacy boot to use the common clock code, or making DT and
      legacy boot mutually exclusive. Given that removing legacy boot code is
      the goal anyway, I am going with the 1st option.
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Cc: Mike Turquette <mturquette@linaro.org>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      16956fed
    • Rob Herring's avatar
      ARM: versatile: add DT based PCI detection · a8e2894c
      Rob Herring authored
      Disable the Versatile PCI DT node when no PCI backplane is detected. This
      will prevent the Versatile PCI driver from probing when PCI is not
      populated.
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      a8e2894c
    • Arnd Bergmann's avatar
      ARM: pxa: mark ezx structures as __maybe_unused · ee5d8742
      Arnd Bergmann authored
      The ezx platform contains multiple machine descriptors, but not all
      of them use all of the data structures, and it's possible to disable
      all of the machines, which produces some harmless warnings:
      
      mach-pxa/ezx.c:53:26: warning: 'ezx_pwm_lookup' defined but not used [-Wunused-variable]
      mach-pxa/ezx.c:86:31: warning: 'ezx_fb_info_1' defined but not used [-Wunused-variable]
      mach-pxa/ezx.c:107:31: warning: 'ezx_fb_info_2' defined but not used [-Wunused-variable]
      mach-pxa/ezx.c:113:32: warning: 'ezx_devices' defined but not used [-Wunused-variable]
      mach-pxa/ezx.c:117:22: warning: 'ezx_pin_config' defined but not used [-Wunused-variable]
      
      This marks all those structures as __maybe_unused to avoid the warnings.
      Obviously a configuration that contains the ezx platform but no specific
      model is a bit silly, but it should not cause compile-time warnings.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      ee5d8742
    • Arnd Bergmann's avatar
      ARM: pxa: mark raumfeld init functions as __maybe_unused · f41bd6af
      Arnd Bergmann authored
      The raumfeld.c file contains three similar machine definitions,
      each with their own init function. If one or more of them are
      disabled, we get compile-time warnings:
      
      arm/mach-pxa/raumfeld.c:1070:123: warning: 'raumfeld_connector_init' defined but not used [-Wunused-function]
      arm/mach-pxa/raumfeld.c:1082:123: warning: 'raumfeld_speaker_init' defined but not used [-Wunused-function]
      
      This marks the functions as __maybe_unused to avoid the warnings.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarDaniel Mack <daniel@zonque.org>
      f41bd6af
    • Arnd Bergmann's avatar
      ARM: pxa: cm-x2xx: avoid duplicate macro warnings · f39c42f5
      Arnd Bergmann authored
      In an old commit, we worked around the duplicate definition of
      GPIO24_SSP1_SFRM in cm-x2xx.c, which includes files for both
      pxa25x and pxa27x. Apparently the problem has come back and we
      now have four additional duplicate symbols that cause warnings:
      
      In file included from /git/arm-soc/arch/arm/mach-pxa/pxa27x.h:7:0,
                       from /git/arm-soc/arch/arm/mach-pxa/cm-x2xx.c:27:
      /git/arm-soc/arch/arm/mach-pxa/mfp-pxa27x.h:21:0: warning: "GPIO86_GPIO" redefined
       #define GPIO86_GPIO  MFP_CFG_IN(GPIO86, AF0)
      
      This uses the same hack as before and undefines all symbols that
      are defined more than once. Fortunately, cm-x2xx does not need
      any of these.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
      f39c42f5
    • Arnd Bergmann's avatar
      Merge branch 'mmp/multiplatform' into next/multiplatform · 8864eaca
      Arnd Bergmann authored
      * mmp/multiplatform:
        ARM: mmp: avoid unused functions
        ARM: mmp: move into ARCH_MULTIPLATFORM
        ARM: mmp: make all header files local
        ARM: mmp: make plat-pxa build standalone
        ARM: mmp: remove remaining legacy pxa-dma support
        ARM: mohawk: allow building with MMU disabled
        ARM: make xscale iwmmxt code multiplatform aware
        clk: mmp: stop using platform headers
      8864eaca
    • Arnd Bergmann's avatar
      Merge branch 's3c64xx/multiplatform' into next/multiplatform · fb4f0424
      Arnd Bergmann authored
      * s3c64xx/multiplatform:
        ARM: s3c64xx: allow building without board support
        ARM: s3c64xx: multiplatform support
        ARM: s3c64xx: use common debug-ll implementation
        ARM: s3c64xx: use new adc/touchscreen driver
        iio: exynos-adc: add experimental touchscreen support
        ARM: s3c64xx: enable sparse IRQ support
        ARM: s3c64xx: prepare initcalls for multiplatform
        gpio: samsung: move gpio-samsung driver back to platform code
        ASoC: samsung/smartq: use dynamic registration
        Input: s3c2410_ts: fix S3C_ADC dependency
      
      Conflicts:
      	arch/arm/Kconfig.debug
      fb4f0424
    • Arnd Bergmann's avatar
      Merge branch 'multiplatform/debug-ll' into next/multiplatform · 35d3aad4
      Arnd Bergmann authored
      * multiplatform/debug-ll:
        ARM: debug-ll: reorder Kconfig alphanumerically
        ARM: debug-ll: rework footbridge handling
        ARM: debug-ll: rework lpc32xx handling
        ARM: debug-ll: rework gemini handling
        ARM: debug-ll: rework integrator/versatile handling
        ARM: debug-ll: rework SPEAr handling
        ARM: debug-ll: rework ep93xx handling
        ARM: debug-ll: reorganize mvebu debug uart config
        ARM: debug-ll: fix UART configuration with ARCH_KEYSTONE
      35d3aad4
    • Arnd Bergmann's avatar
      ARM: debug-ll: reorder Kconfig alphanumerically · 1dc93416
      Arnd Bergmann authored
      The file has gotten a little out of sync, as platforms got
      added in the wrong place, or have been renamed. This moves
      the options around, but should not change any functionality.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      1dc93416
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework footbridge handling · 0045c0dd
      Arnd Bergmann authored
      Footbridge has two debug ports that are handled a bit differently:
      
      The 8250 port uses the normal debug/8250.S implementation that is shared
      with a lot of other platforms, but it relies on the DEBUG_UART_8250
      option to be turned on automatically instead of being selected by
      DEBUG_FOOTBRIDGE_COM1 as we do for most other platforms. I'm changing
      this to use a 'select' and change the dependency to the debug symbol
      rather than the platform symbol for consistency.
      
      The DC21285 UART has a separate top-level option, and relies on
      the traditional include/mach/debug-macro.S method. With the s3c64xx
      multiplatform series queued up for 4.5, it is now the last one that does
      this, so by moving this file to include/debug/dc21285.S, we can get
      all platforms to do things the same way.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      0045c0dd
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework lpc32xx handling · 59bd4c38
      Arnd Bergmann authored
      LPC32xx can not yet be configured in a multiplatform kernel, but
      if we ever get there, enabling one of the LPC32xx platforms
      while trying to use DEBUG_LL for another platform can default to
      the wrong UART address, as the options are purely based on the
      architecture being enabled or not.
      
      This changes the logic to use the LPC32xx default addresses only
      if we have also picked the respective Kconfig symbols introduced
      here.
      
      While we're at it, this also reorders the virtual address as
      it should be.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarVladimir Zapolskiy <vz@mleia.com>
      59bd4c38
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework gemini handling · d7175a3b
      Arnd Bergmann authored
      Gemini can not yet be configured in a multiplatform kernel, but
      if we ever get there, enabling one of the gemini platforms
      while trying to use DEBUG_LL for another platform can default to
      the wrong UART address, as the options are purely based on the
      architecture being enabled or not.
      
      This changes the logic to use the gemini default addresses and
      the flow control settings only if we have also picked the respective
      Kconfig symbols introduced here.
      
      While we're at it, this also reorders the virtual address as
      it should be.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarHans Ulli Kroll <ulli.kroll@googlemail.com>
      d7175a3b
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework integrator/versatile handling · 4db22c10
      Arnd Bergmann authored
      Enabling one of the integrator platforms in a multiplatform kernel
      while trying to use DEBUG_LL for another platform can default to
      the wrong UART address, as the options are purely based on the
      architecture being enabled or not.
      
      This changes the logic to use the integrator default addresses only
      if we have also picked the respective Kconfig symbols introduced
      here. Versatile is not yet part of multiplatform, but hopefully
      soon will be, so we do the same change for versatile as well.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      4db22c10
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework SPEAr handling · 375d84cf
      Arnd Bergmann authored
      Enabling one of the SPEAr platforms in a multiplatform kernel
      while trying to use DEBUG_LL for another platform can default to
      the wrong UART address, as the options are purely based on the
      architecture being enabled or not.
      
      This changes the logic to use the SPEAr default addresses only
      if we have also picked the respective Kconfig symbols introduced
      here.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      375d84cf
    • Arnd Bergmann's avatar
      ARM: debug-ll: rework ep93xx handling · f06455fa
      Arnd Bergmann authored
      This makes ep93xx debug-ll handling more consistent with the other
      platforms, by adding a separate Kconfig symbol for it that
      in turn selects the standard DEBUG_UART_PL01X symbol.
      
      We still have to pick a physical address even if DEBUG_LL is disabled
      here, because the EP93xx uncompress output code uses
      CONFIG_DEBUG_UART_PHYS. If we ever move to multiplatform support,
      this can go away.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      f06455fa
    • Arnd Bergmann's avatar
      ARM: debug-ll: reorganize mvebu debug uart config · c047f529
      Arnd Bergmann authored
      As we are moving dove/mv78xx0/orion into multiplatform, the debug-ll
      configuration options for these platforms are conflicting with the
      multiplatform configuration: enabling one of those platforms sometimes
      changes the default addresses to the ones used on one of them, rather
      than the one that was selected in Kconfig.
      
      This changes the configuration so we share the physical address
      configuration with mach-mvebu.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      c047f529
    • Arnd Bergmann's avatar
      ARM: debug-ll: fix UART configuration with ARCH_KEYSTONE · cdd2e08b
      Arnd Bergmann authored
      We may have multiple platforms enabled and also DEBUG_LL
      configured for one of them. However if we enable ARCH_KEYSTONE,
      we default to using 32-bit UART access independent of which
      platform we are actually using, which can be confusing.
      
      This changes the logic so the 32-bit default gets only
      used by default if we actually configure the keystone
      UART, as opposed to picking some other 8250 setting on
      a kernel that has keystone support enabled.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      cdd2e08b
    • Linus Walleij's avatar
      ARM: realview: add an DT SMP boot method · 5420b4b1
      Linus Walleij authored
      This adds an SMP boot method for the ARM RealView reference
      designs. We also select HAVE_SMP by default and make it use
      SMP_ON_UP so we only need to support one single kernel across
      the RealView reference designs when using DT.
      
      The RealViews need to have the SCU (Snoop Control Unit)
      activated on boot, and this is now done by looking up its
      address from the device tree and initializing it and counting
      the available cores.
      
      The RealViews boot by using a magic address register in the
      system controller (SYS_FLAGS) to store the boot address,
      the ROM will then read this register to the PC when the CPUs
      are taken out of WFI. This code uses a handle to the syscon
      regmap to access this register.
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      5420b4b1
    • Linus Walleij's avatar
      ARM: realview: select SP810 and ICST for the DT variant · ca5b21fa
      Linus Walleij authored
      The device tree boot for RealView need the SP810 system controller
      (same as found on the Versatile Express) to set up the timers on the
      board so the machine can tick. It further utilize the ICST307 through
      its system controller for 6 other oscillators. We have to select these
      from Kconfig or the machine does not boot.
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      ca5b21fa
    • Linus Walleij's avatar
      soc: versatile: add support for the PB11MPCore · 5d87f7a3
      Linus Walleij authored
      The SoC driver needs a minor update to display the correct
      sysfs information for the PB11MPCore.
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      5d87f7a3
    • Linus Walleij's avatar
      clk: versatile-icst: add device tree support · d430819d
      Linus Walleij authored
      This adds support for the ARM syscon ICST clocks to initialized
      directly from the device tree syscon node on ARM Integrator,
      Versatile and RealView reference designs.
      
      Cc: Michael Turquette <mturquette@baylibre.com>
      Cc: Stephen Boyd <sboyd@codeaurora.org>
      Cc: linux-clk@vger.kernel.org
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      d430819d
    • Linus Walleij's avatar
      clk: versatile-icst: refactor to allocate regmap separately · 384d977d
      Linus Walleij authored
      Break out the registration function so it creates a regmap and
      pass to the setup function, so the latter can be shared with
      a device tree probe function that already has a regmap.
      
      Cc: Michael Turquette <mturquette@baylibre.com>
      Cc: Stephen Boyd <sboyd@codeaurora.org>
      Cc: linux-clk@vger.kernel.org
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      384d977d
    • Linus Walleij's avatar
      clk: versatile-icst: convert to use regmap · 179c8fb3
      Linus Walleij authored
      Instead of passing around register bases, pass around a regmap
      in this driver. This refactoring make things so much easier when
      we later want to manage an ICST that is part of a syscon.
      
      Cc: Michael Turquette <mturquette@baylibre.com>
      Cc: Stephen Boyd <sboyd@codeaurora.org>
      Cc: linux-clk@vger.kernel.org
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      179c8fb3
    • Arnd Bergmann's avatar
      ARM: realview: remove private barrier implementation · 2b749cb3
      Arnd Bergmann authored
      The realview barrier implementation tries to avoid calling outer_sync in order
      to not lock up as a result of a bug in the l220 cache controller.
      
      This gets in the way of the multiplatform support, but we can still remove
      it if we make sure that the outer_sync function never gets called, by replacing
      the function pointer with NULL, right after initialization.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      [Fixed up header inclusions]
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      2b749cb3
    • Arnd Bergmann's avatar
      ARM: no longer force unbuffered DMA for realview · 38541bf4
      Arnd Bergmann authored
      Commit 42c4dafe ("ARM: 6202/1: Do not ARM_DMA_MEM_BUFFERABLE
      on RealView boards with L210/L220") changed the generic setting for
      ARM_DMA_MEM_BUFFERABLE to be disabled on any Realview kernel that includes
      support for any of the ARM11 variations. Doing this was required to
      allow doing DMA without a lockup in the l2x0 cache controller on the
      Realview platform.
      
      Unfortunately, in a kernel that also contains support for any ARMv7
      based machine, the same change makes it impossible to do DMA on ARMv7,
      which gets in the way of enabling multiplatform support on Realview.
      
      As confirmed by Catalin Marinas and Linus Walleij, the current
      code for Realview that we have in the kernel does not actually
      perform any DMA, and this is unlikely to change in the future.
      Therefore we can revert 42c4dafe without introducing regressions,
      but we must never start using DMA on this platform in the future.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      38541bf4
    • Arnd Bergmann's avatar
      clk/realview: stop using machine headers · 3c30a4a3
      Arnd Bergmann authored
      In order to move realview into multiplatform, we have to prevent device
      drivers from accessing the machine header files.
      
      In case of the clk driver, this is very simple, we just copy the
      small set of register definitions into the driver that needs them.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      3c30a4a3
    • Arnd Bergmann's avatar
      ARM: realview: don't map undefined PCI registers · 930748a0
      Arnd Bergmann authored
      PCI support for realview was never merged, and trying to build realview with
      CONFIG_PCI enabled fails because the constants for the mapping windows are
      not defined anywhere.
      
      This removes them from the static I/O window mapping table as a preparation
      for multiplatform support.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      930748a0
    • Arnd Bergmann's avatar
      ARM: realview: remove sparsemem hack · fd0053c9
      Arnd Bergmann authored
      The realview-pbx platform has an elaborate way of avoiding the use of highmem
      by redefining its phys_to_virt function. In practice this doesn't help all
      that much, and it gets in the way of doing multiplatform builds for
      realview.
      
      This removes the feature and kills off the mach/memory.h file for realview.
      We also lose the ability to do sparsemem with this patch, but that should
      be put back into place for generic multiplatform configurations, to save
      a little memory on PBX.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      fd0053c9
  3. 08 Dec, 2015 2 commits
  4. 07 Dec, 2015 2 commits