1. 19 Jan, 2015 1 commit
    • Andrew Lunn's avatar
      bus: mvebu-mbus: fix support of MBus window 13 · 38bdf45f
      Andrew Lunn authored
      On Armada XP, 375 and 38x the MBus window 13 has the remap capability,
      like windows 0 to 7. However, the mvebu-mbus driver isn't currently
      taking into account this special case, which means that when window 13
      is actually used, the remap registers are left to 0, making the device
      using this MBus window unavailable.
      
      As a minimal fix for stable, don't use window 13. A full fix will
      follow later.
      
      Fixes: fddddb52
      
       ("bus: introduce an Marvell EBU MBus driver")
      Cc: <stable@vger.kernel.org> # v3.10+
      Reviewed-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
      Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
      38bdf45f
  2. 17 Jan, 2015 1 commit
  3. 30 Nov, 2014 2 commits
    • Thomas Petazzoni's avatar
      bus: mvebu-mbus: provide a mechanism to save SDRAM window configuration · 4749c02b
      Thomas Petazzoni authored
      
      
      On Marvell EBU platforms, when doing suspend/resume, the SDRAM window
      configuration must be saved on suspend, and restored on
      resume. However, it needs to be restored on resume *before*
      re-entering the kernel, because the SDRAM window configuration defines
      the layout of the memory. For this reason, it cannot simply be done in
      the ->suspend() and ->resume() hooks of the mvebu-mbus driver.
      
      Instead, it needs to be restored by the bootloader "boot info"
      mechanism used when resuming. This mechanism allows the kernel to
      define a list of (address, value) pairs when suspending, that the
      bootloader will restore on resume before jumping back into the kernel.
      
      This commit therefore adds a new function to the mvebu-mbus driver,
      called mvebu_mbus_save_cpu_target(), which will be called by the
      platform code to make the mvebu-mbus driver save the SDRAM window
      configuration in a way that can be understood by the bootloader "boot
      info" mechanism.
      Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
      Reviewed-by: default avatarGregory CLEMENT <gregory.clement@free-electrons.com>
      Link: https://lkml.kernel.org/r/1416585613-2113-8-git-send-email-thomas.petazzoni@free-electrons.com
      
      Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
      4749c02b
    • Thomas Petazzoni's avatar
      bus: mvebu-mbus: suspend/resume support · a0e89c02
      Thomas Petazzoni authored
      
      
      This commit extends the mvebu-mbus driver to provide suspend/resume
      support. Since mvebu-mbus is not a platform_driver, the syscore_ops
      mechanism is used to get ->suspend() and ->resume() hooks called into
      the driver.
      
      In those hooks, we save and restore the MBus windows state, to make
      sure after resume all Mbus windows are properly restored. Note that
      while the state of some windows could be gathered by looking again at
      the Device Tree (for statically described windows), it is not the case
      of dynamically described windows such as the PCIe memory and I/O
      windows. Therefore, we take the simple approach of saving and
      restoring the registers for all MBus windows.
      
      In addition, the commit extends the Device Tree binding of the MBus
      controller, to control the MBus bridge registers (which define which
      parts of the physical address space is routed to MBus windows
      vs. normal RAM memory). Those registers must be saved and restored
      during suspend/resume. The Device Tree binding extension is made is a
      backward compatible fashion, but of course, suspend/resume will not
      work without the Device Tree update.
      Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
      Link: https://lkml.kernel.org/r/1416585613-2113-7-git-send-email-thomas.petazzoni@free-electrons.com
      
      Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
      a0e89c02
  4. 28 Nov, 2014 4 commits
  5. 21 Nov, 2014 1 commit
    • Florian Fainelli's avatar
      bus: brcmstb_gisb: resolve section mismatch · 2e8a29a1
      Florian Fainelli authored
      Commit f1bee783 moved the call to hook_fault_code in
      brcmstb_gisb_arb_probe() which now calls a function annotated with __init, so
      this one must also be annotated with __init.
      
      In order to avoid introducing another section mismatch, call
      platform_driver_probe() manually and remove the .probe assignment from
      brcmstb_gisb_arb_driver, this is very similar to what
      drivers/pci/host/pci-imx6.c does since we basically have the same constraints
      here.
      
      Fixes: f1bee783
      
       ("bus: brcmstb_gisb: register the fault code hook")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      2e8a29a1
  6. 12 Nov, 2014 2 commits
  7. 05 Nov, 2014 1 commit
  8. 30 Oct, 2014 1 commit
    • Mark Rutland's avatar
      bus: cci: move away from arm_pmu framework · c6f85cb4
      Mark Rutland authored
      
      
      The ARM CPU PMUs and the ARM CCI PMU are using the same framework
      despite being substantially different in programming model, which makes
      it difficult to handle either particularly well.
      
      This patch migrates the ARM CCI PMU driver away from the arm_pmu
      framework, matching the style of the CCN PMU driver and other 'uncore'
      PMU drivers. This will enable refactoring of the arm_pmu framework to
      better support CPU PMUs. Event context migration on hotplug is not yet
      added due to a race on event->ctx in the core perf code.
      Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
      Acked-by: default avatarPunit Agrawal <punit.agrawal@arm.com>
      Cc: Pawel Moll <pawel.moll@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      [will: fix whitespace issues]
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      c6f85cb4
  9. 20 Oct, 2014 3 commits
  10. 08 Oct, 2014 1 commit
  11. 11 Sep, 2014 1 commit
    • Nishanth Menon's avatar
      bus: omap_l3_noc: Fix connID for OMAP4 · 41fc619d
      Nishanth Menon authored and Tony Lindgren's avatar Tony Lindgren committed
      Commit d4d8819e ("bus: omap_l3_noc: fix masterid detection")
      did the right thing in dropping the LSB 2 bits which is not part
      of the ConnID for NTTP master address. However, as part of that
      change, we should also have ensured that existing list of OMAP4 connID
      codes are also shifted by 2 bits to ensure that connIDs map to "Table
      13-18. ConnID Values" as provided in Technical Reference Manuals for
      OMAP4430(Rev AP, April 2014, SWPU220AP) and OMAP4460(Rev AB, April
      2014, SWPU234AB)
      
      Fixes: d4d8819e
      
       ("bus: omap_l3_noc: fix masterid detection")
      Reported-by: default avatarKristian Otnes <kotnes@cisco.com>
      Signed-off-by: default avatarNishanth Menon <nm@ti.com>
      Signed-off-by: Tony Lindgren's avatarTony Lindgren <tony@atomide.com>
      41fc619d
  12. 05 Sep, 2014 1 commit
  13. 24 Aug, 2014 1 commit
  14. 01 Aug, 2014 1 commit
  15. 31 Jul, 2014 1 commit
  16. 24 Jul, 2014 1 commit
  17. 23 Jul, 2014 1 commit
    • Pawel Moll's avatar
      bus: ARM CCN PMU driver · a33b0daa
      Pawel Moll authored
      
      
      Driver providing perf backend for ARM Cache Coherent Network
      interconnect. Supports counting all hardware events and crosspoint
      watchpoints.
      
      Currently works with CCN-504 only, although there should be
      no changes required for CCN-508 (just impossible to test it now).
      Signed-off-by: default avatarPawel Moll <pawel.moll@arm.com>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      a33b0daa
  18. 18 Jul, 2014 1 commit
    • Liu Ying's avatar
      bus: imx-weim: populate devices on a simple bus · 26651c43
      Liu Ying authored
      
      
      There could be some memory map devices located in
      a certain chip select region of the i.MX WEIM.
      The devices could be attached to a simple bus(for
      example, a AXI bus) whose root node is one child
      device tree node of the i.MX WEIM device tree node.
      There should be a bridge(very likely, software
      transparent) bewteen the i.MX WEIM and the simple bus.
      This patch makes the i.MX WEIM driver possible to
      populate devices on a simple bus.  In this way, people
      may try various IPs(in a FPGA, maybe) outside of i.MX
      chips with the i.MX WEIM embedded.
      Signed-off-by: default avatarLiu Ying <Ying.Liu@freescale.com>
      Signed-off-by: default avatarShawn Guo <shawn.guo@freescale.com>
      26651c43
  19. 20 Jun, 2014 1 commit
  20. 17 Jun, 2014 1 commit
    • Arnd Bergmann's avatar
      bus/arm-cci: add dependency on OF && CPU_V7 · 30b6f37d
      Arnd Bergmann authored
      
      
      The arm-cci code uses device tree helpers for initialization
      that don't work on kernels built without CONFIG_OF. Further,
      it contains an inline assembly in cci_enable_port_for_self()
      that uses ARMv7 instructions and fails to build when targetting
      other ARM instruction set versions.
      
      This works around both issues by limiting the scope of the
      Kconfig symbol to platforms that can actually build this driver
      cleanly.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
      Cc: Shawn Guo <shawn.guo@linaro.org>
      30b6f37d
  21. 26 May, 2014 1 commit
    • Arnd Bergmann's avatar
      ARM: vexpress: refine dependencies for new code · b33cdd28
      Arnd Bergmann authored
      
      
      The versatile express changes for 3.16 introduced a number of
      build regressions for randconfig kernels by not tracking dependencies
      between the components right.
      
      This patch tries to rectify that:
      
      * the mach-vexpress code cannot link without the syscfg driver,
        which in turn needs MFD_VEXPRESS_SYSREG
      * various drivers call devm_regmap_init_vexpress_config(), which
        has to be exported so it can be used by loadable modules
      * the configuration bus uses OF DT helper functions that are not
        available to platforms disable CONFIG_OF
      * The sysreg driver exports GPIOs through gpiolib, which can
        be disabled on some platforms.
      * The clocksource code cannot be built on platforms that don't
        use modern timekeeping but rely on gettimeoffset.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      b33cdd28
  22. 23 May, 2014 1 commit
    • Florian Fainelli's avatar
      bus: add Broadcom GISB bus arbiter timeout/error handler · 44127b77
      Florian Fainelli authored
      
      
      This patch adds support for the Broadcom GISB arbiter bus timeout/error
      handler. GISB is a proprietary bus used by Broadcom Set Top Box
      System-on-a-chip devices (BCM7xxx) which allows multiple masters and
      clients to be interfaced with each other.
      
      The bus arbiter offers support for generating two interrupts towards the
      host CPU, thus allowing us to "catch" clock gated masters, or masters
      being volontarily blocked for powersaving purposes, or do general system
      troubleshooting.
      
      We also register a hook with the ARM fault exception handling to allow
      printing a more informative message than "imprecise external abort at
      0x00000000" for instance.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      44127b77
  23. 15 May, 2014 1 commit
    • Pawel Moll's avatar
      mfd: vexpress: Convert custom func API to regmap · 3b9334ac
      Pawel Moll authored
      
      
      Components of the Versatile Express platform (configuration
      microcontrollers on motherboard and daughterboards in particular)
      talk to each other over a custom configuration bus. They
      provide miscellaneous functions (from clock generator control
      to energy sensors) which are represented as platform devices
      (and Device Tree nodes). The transactions on the bus can
      be generated by different "bridges" in the system, some
      of which are universal for the whole platform (for the price
      of high transfer latencies), others restricted to a subsystem
      (but much faster).
      
      Until now drivers for such functions were using custom "func"
      API, which is being replaced in this patch by regmap calls.
      This required:
      
      * a rework (and move to drivers/bus directory, as suggested
        by Samuel and Arnd) of the config bus core, which is much
        simpler now and uses device model infrastructure (class)
        to keep track of the bridges; non-DT case (soon to be
        retired anyway) is simply covered by a special device
        registration function
      
      * the new config-bus driver also takes over device population,
        so there is no need for special matching table for
        of_platform_populate nor "simple-bus" hack in the arm64
        model dtsi file (relevant bindings documentation has
        been updated); this allows all the vexpress devices
        fit into normal device model, making it possible
        to remove plenty of early inits and other hacks in
        the near future
      
      * adaptation of the syscfg bridge implementation in the
        sysreg driver, again making it much simpler; there is
        a special case of the "energy" function spanning two
        registers, where they should be both defined in the tree
        now, but backward compatibility is maintained in the code
      
      * modification of the relevant drivers:
      
        * hwmon - just a straight-forward API change
        * power/reset driver - API change
        * regulator - API change plus error handling
          simplification
        * osc clock driver - this one required larger rework
          in order to turn in into a standard platform driver
      Signed-off-by: default avatarPawel Moll <pawel.moll@arm.com>
      Acked-by: default avatarMark Brown <broonie@linaro.org>
      Acked-by: default avatarLee Jones <lee.jones@linaro.org>
      Acked-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Acked-by: default avatarMike Turquette <mturquette@linaro.org>
      3b9334ac
  24. 05 May, 2014 10 commits