1. 06 Oct, 2016 18 commits
  2. 04 Oct, 2016 22 commits
    • Paul Burton's avatar
      MIPS: SEAD3: Parse memsize in DT shim · fd4d7404
      Paul Burton authored
      Parse the memsize argument provided by the bootloader in the DT shim
      code, allowing the user to override it on the command line. This places
      all of the DT manipulation code into sead3-dtshim.c.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Matt Redfearn <matt.redfearn@imgtec.com>
      Cc: Rob Herring <robh@kernel.org>
      Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14058/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      fd4d7404
    • Paul Burton's avatar
      MIPS: SEAD3: Use generic restart-poweroff driver · a1ec6003
      Paul Burton authored
      Remove the custom platform code to restart when instructed to power off,
      instead relying upon the generic restart-poweroff driver probed via DT
      to do the same thing.
      
      Remove also the halt implementation, which is incorrect. The generic
      MIPS version will hang the system as halt should.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14057/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      a1ec6003
    • Paul Burton's avatar
      MIPS: SEAD3: Reset via generic syscon-reboot driver & DT · 70bfdcec
      Paul Burton authored
      Remove the SEAD3 implementation of _machine_restart & instead make use
      of the generic syscon-reboot driver probed via device tree.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14056/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      70bfdcec
    • Paul Burton's avatar
      MIPS: SEAD3: Use register-bit-led driver via DT for LEDs · c764583f
      Paul Burton authored
      Probe a driver for the PLED & FLED LEDs found on the SEAD3 board using
      the register-bit-led driver via device tree, rather than a custom driver
      via platform code. Enable support for the register-bit-led driver & its
      prerequisite syscon in sead3_defconfig.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14054/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      c764583f
    • Paul Burton's avatar
      MIPS: SEAD3: Probe parallel flash via DT · 3aefc655
      Paul Burton authored
      Probe the system parallel flash using device tree rather than platform
      code, in order to reduce the amount of the latter.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14053/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      3aefc655
    • Paul Burton's avatar
      USB: host: ehci-sead3: Remove SEAD-3 EHCI code · 63c8d90c
      Paul Burton authored
      The SEAD-3 board is now probing its EHCI controller using the generic
      EHCI driver & its generic-ehci device tree binding. Remove the unused
      SEAD-3 specific EHCI code.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Cc: linux-usb@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14052/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      63c8d90c
    • Paul Burton's avatar
      MIPS: SEAD3: Probe EHCI controller using DT · 7afd2a5a
      Paul Burton authored
      Probe the SEAD3 EHCI controller using the generic-ehci driver & device
      tree rather than platform code, in order to reduce the amount of the
      latter.
      
      Now that no devices probed from platform code require interrupts, remove
      the retrieval of the IRQ domain & sead3int.h.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14051/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      7afd2a5a
    • Paul Burton's avatar
      MIPS: SEAD3: Probe ethernet controller using DT · a34e9388
      Paul Burton authored
      Probe the smsc911x ethernet controller using device tree rather than
      platform code, reducing the amount of the latter.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14050/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      a34e9388
    • Paul Burton's avatar
      MIPS: SEAD3: Use generic ns16550a earlycon support · 53f37d1d
      Paul Burton authored
      Stop selecting SYS_HAS_EARLY_PRINTK & remove the custom support for
      early output to the ns16550a UARTs, instead relying upon generic
      ns16550a earlycon support. This reduces the amount of platform code
      required for SEAD3 without losing any functionality.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14049/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      53f37d1d
    • Paul Burton's avatar
      MIPS: SEAD3: Probe UARTs using DT · c11e3b48
      Paul Burton authored
      Probe the UARTs on SEAD3 boards using device tree rather than platform
      code, in order to reduce the amount of the latter. This requires that
      CONFIG_SERIAL_OF_PLATFORM be enabled, so enable it in sead3_defconfig.
      The SEAD3 DT shim code is extended to read bootloader environment
      variables to determine the appropriate UART & mode for kernel console
      output & set the stdout-path property of the chosen node accordingly.
      
      In contrast to the old platform code, which appears to have only ever
      set "console=ttyS0,38400n8r" with the code in console_config never
      having an effect, this will honor the "yamontty" environment variable to
      select between the 2 UARTs on the board and then check the "modetty0" or
      "modetty1" variable as appropriate to determine the UART configuration.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14048/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      c11e3b48
    • Paul Burton's avatar
      MIPS: SEAD3: Probe interrupt controllers using DT · b6d5e47e
      Paul Burton authored
      Probe the CPU interrupt controller & optional Global Interrupt
      Controller (GIC) using devicetree rather than platform code. Because the
      bootloader on SEAD3 does not provide a device tree to the kernel & the
      device tree is always built in, we patch out the GIC node during boot if
      we detect that a GIC is not present in the system.
      
      The appropriate IRQ domain is discovered by platform code setting up
      device IRQ numbers temporarily. It will be removed by further patches
      which move the devices towards being probed via device tree.
      
      No behavioural change is intended by this patch.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Matt Redfearn <matt.redfearn@imgtec.com>
      Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14047/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      b6d5e47e
    • Paul Burton's avatar
      MIPS: SEAD3: Split obj-y entries across lines · 0a152736
      Paul Burton authored
      Split the obj-y entries for SEAD3 onto a line each, so that they're more
      independent & can be modified more clearly by later commits.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14046/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      0a152736
    • Paul Burton's avatar
      MIPS: pm-cps: Generate idle state entry code when CPUs are onlined · ba750502
      Paul Burton authored
      The MIPS Coherent Processing System (CPS) power management code has
      previously generated code used to enter low power idle states once
      during boot for all CPUs. This has the drawback that if a CPU is present
      in the system but not being used (for example due to the maxcpus kernel
      parameter) then we encounter problems due to not having probed that CPU
      for information about its type & properties. The result of this is that
      we generate entry code which is both unused, potentially entirely
      invalid & likely to be unsuitable for the CPU in question anyway.
      
      Avoid this by generating idle state entry code only when a CPU is
      brought online. This way we only ever generate code for CPUs that we
      know we've probed the properties of, and that will actually be used.
      
      [ralf@linux-mips.org: Resolve merge conflict.]
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
      Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
      Cc: Markos Chandras <markos.chandras@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14259/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      ba750502
    • Paul Gortmaker's avatar
      MIPS: kvm: Audit and remove any unnecessary uses of module.h · cd14c92b
      Paul Gortmaker authored
      Historically a lot of these existed because we did not have
      a distinction between what was modular code and what was providing
      support to modules via EXPORT_SYMBOL and friends.  That changed
      when we forked out support for the latter into the export.h file.
      
      This means we should be able to reduce the usage of module.h
      in code that is obj-y Makefile or bool Kconfig.  In the case of
      kvm where it is modular, we can extend that to also include files
      that are building basic support functionality but not related
      to loading or registering the final module; such files also have
      no need whatsoever for module.h
      
      The advantage in removing such instances is that module.h itself
      sources about 15 other headers; adding significantly to what we feed
      cpp, and it can obscure what headers we are effectively using.
      
      Since module.h was the source for init.h (for __init) and for
      export.h (for EXPORT_SYMBOL) we consider each instance for the
      presence of either and replace as needed.  In this case, we did
      not need to add either to any files.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Acked-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Acked-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: kvm@vger.kernel.org
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14036/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      cd14c92b
    • Paul Gortmaker's avatar
      MIPS: pci: Audit and remove any unnecessary uses of module.h · 2722090a
      Paul Gortmaker authored
      Historically a lot of these existed because we did not have
      a distinction between what was modular code and what was providing
      support to modules via EXPORT_SYMBOL and friends.  That changed
      when we forked out support for the latter into the export.h file.
      
      This means we should be able to reduce the usage of module.h
      in code that is obj-y Makefile or bool Kconfig.  The advantage
      in doing so is that module.h itself sources about 15 other headers;
      adding significantly to what we feed cpp, and it can obscure what
      headers we are effectively using.
      
      Since module.h was the source for init.h (for __init) and for
      export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance
      for the presence of either and replace as needed.
      
      We also needed to remove the no-op MODULE_DEVICE_TABLE usage in
      several instances to permit removal of the module.h include.  The
      files in these instances were all controlled by bool Kconfig.
      
      In one instance, module_param was being used so we transition the
      module.h include onto a moduleparam.h include.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14035/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      2722090a
    • Paul Gortmaker's avatar
      MIPS: lib: Audit and remove any unnecessary uses of module.h · 527581b9
      Paul Gortmaker authored
      Historically a lot of these existed because we did not have
      a distinction between what was modular code and what was providing
      support to modules via EXPORT_SYMBOL and friends.  That changed
      when we forked out support for the latter into the export.h file.
      
      This means we should be able to reduce the usage of module.h
      in code that is obj-y Makefile or bool Kconfig.  The advantage
      in doing so is that module.h itself sources about 15 other headers;
      adding significantly to what we feed cpp, and it can obscure what
      headers we are effectively using.
      
      Since module.h was the source for init.h (for __init) and for
      export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance
      for the presence of either and replace as needed.
      
      The compiler.h additions are for an implict presence of the
      "notrace" which module.h brought in but export.h does not.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14034/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      527581b9
    • Paul Gortmaker's avatar
      MIPS: mm: Audit and remove any unnecessary uses of module.h · d9ba5778
      Paul Gortmaker authored
      Historically a lot of these existed because we did not have
      a distinction between what was modular code and what was providing
      support to modules via EXPORT_SYMBOL and friends.  That changed
      when we forked out support for the latter into the export.h file.
      
      This means we should be able to reduce the usage of module.h
      in code that is obj-y Makefile or bool Kconfig.  The advantage
      in doing so is that module.h itself sources about 15 other headers;
      adding significantly to what we feed cpp, and it can obscure what
      headers we are effectively using.
      
      Since module.h was the source for init.h (for __init) and for
      export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance
      for the presence of either and replace as needed.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14033/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      d9ba5778
    • Paul Gortmaker's avatar
      MIPS: kernel: Audit and remove any unnecessary uses of module.h · d9d54177
      Paul Gortmaker authored
      Historically a lot of these existed because we did not have
      a distinction between what was modular code and what was providing
      support to modules via EXPORT_SYMBOL and friends.  That changed
      when we forked out support for the latter into the export.h file.
      
      This means we should be able to reduce the usage of module.h
      in code that is obj-y Makefile or bool Kconfig.  The advantage
      in doing so is that module.h itself sources about 15 other headers;
      adding significantly to what we feed cpp, and it can obscure what
      headers we are effectively using.
      
      Since module.h was the source for init.h (for __init) and for
      export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance
      for the presence of either and replace as needed.
      
      In the case of the n32/o32 files, we have to get rid of a couple
      no-op MODULE_ tags to facilitate the module.h removal.  They piggy
      back off the fs/ elf binary support, which is also a bool Kconfig.
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14032/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      d9d54177
    • Ralf Baechle's avatar
      74abd4e9
    • Matt Redfearn's avatar
      MIPS: smp.c: Introduce mechanism for freeing and allocating IPIs · 7688c539
      Matt Redfearn authored
      For the MIPS remote processor implementation, we need additional IPIs to
      talk to the remote processor. Since MIPS GIC reserves exactly the right
      number of IPI IRQs required by Linux for the number of VPs in the
      system, this is not possible without releasing some recources.
      
      This commit introduces mips_smp_ipi_allocate() which allocates IPIs to a
      given cpumask. It is called as normal with the cpu_possible_mask at
      bootup to initialise IPIs to all CPUs. mips_smp_ipi_free() may then be
      used to free IPIs to a subset of those CPUs so that their hardware
      resources can be reused.
      Signed-off-by: default avatarMatt Redfearn <matt.redfearn@imgtec.com>
      Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
      Cc: Ohad Ben-Cohen <ohad@wizery.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Lisa Parratt <Lisa.Parratt@imgtec.com>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Qais Yousef <qsyousef@gmail.com>
      Cc: Paul Burton <paul.burton@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-remoteproc@vger.kernel.org
      Cc: lisa.parratt@imgtec.com
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14285/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      7688c539
    • Matt Redfearn's avatar
      MIPS: tlb-r4k: If there are wired entries, don't use TLBINVF · e710d666
      Matt Redfearn authored
      When adding a wired entry to the TLB via add_wired_entry, the tlb is
      flushed with local_flush_tlb_all, which on CPUs with TLBINV results in
      the new wired entry being flushed again.
      
      Behavior of the TLBINV instruction applies to all applicable TLB entries
      and is unaffected by the setting of the Wired register. Therefore if
      the TLB has any wired entries, fall back to iterating over the entries
      rather than blasting them all using TLBINVF.
      Signed-off-by: default avatarMatt Redfearn <matt.redfearn@imgtec.com>
      Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
      Cc: Ohad Ben-Cohen <ohad@wizery.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: lisa.parratt@imgtec.com
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Huacai Chen <chenhc@lemote.com>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Paul Burton <paul.burton@imgtec.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: linux-mips@linux-mips.org
      Cc: linux-remoteproc@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14283/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      e710d666
    • James Hogan's avatar
      MIPS: c-r4k: Fix flush_icache_range() for EVA · b2ff7171
      James Hogan authored
      flush_icache_range() flushes icache lines in a protected fashion for
      kernel addresses, however this isn't correct with EVA where protected
      cache ops only operate on user addresses, making flush_icache_range()
      ineffective.
      
      Split the implementations of __flush_icache_user_range() from
      flush_icache_range(), changing the normal flush_icache_range() to use
      unprotected normal cache ops.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Leonid Yegoshin <leonid.yegoshin@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/14156/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      b2ff7171