1. 14 5月, 2015 1 次提交
    • H
      usb: add bus type for USB ULPI · 289fcff4
      Heikki Krogerus 提交于
      UTMI+ Low Pin Interface (ULPI) is a commonly used PHY
      interface for USB 2.0. The ULPI specification describes a
      standard set of registers which the vendors can extend for
      their specific needs. ULPI PHYs provide often functions
      such as charger detection and ADP sensing and probing.
      
      There are two major issues that the bus type is meant to
      tackle:
      
      Firstly, ULPI registers are accessed from the controller.
      The bus provides convenient method for the controller
      drivers to share that access with the actual PHY drivers.
      
      Secondly, there are already platforms that assume ULPI PHYs
      are runtime detected, such as many Intel Baytrail based
      platforms. They do not provide any kind of hardware
      description for the ULPI PHYs like separate ACPI device
      object that could be used to enumerate a device from.
      Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
      Acked-by: NDavid Cohen <david.a.cohen@linux.intel.com>
      Signed-off-by: NFelipe Balbi <balbi@ti.com>
      289fcff4
  2. 31 3月, 2015 1 次提交
    • J
      MIPS: Add CDMM bus support · 8286ae03
      James Hogan 提交于
      Add MIPS Common Device Memory Map (CDMM) support in the form of a bus in
      the standard Linux device model. Each device attached via CDMM is
      discoverable via an 8-bit type identifier and may contain a number of
      blocks of memory mapped registers in the CDMM region. IRQs are expected
      to be handled separately.
      
      Due to the per-cpu (per-VPE for MT cores) nature of the CDMM devices,
      all the driver callbacks take place from workqueues which are run on the
      right CPU for the device in question, so that the driver doesn't need to
      be as concerned about which CPU it is running on. Callbacks also exist
      for when CPUs are taken offline, so that any per-CPU resources used by
      the driver can be disabled so they don't get forcefully migrated. CDMM
      devices are created as children of the CPU device they are attached to.
      
      Any existing CDMM configuration by the bootloader will be inherited,
      however platforms wishing to enable CDMM should implement the weak
      mips_cdmm_phys_base() function (see asm/cdmm.h) so that the bus driver
      knows where it should put the CDMM region in the physical address space
      if the bootloader hasn't already enabled it.
      
      A mips_cdmm_early_probe() function is also provided to allow early boot
      or particularly low level code to set up the CDMM region and probe for a
      specific device type, for example early console or KGDB IO drivers for
      the EJTAG Fast Debug Channel (FDC) CDMM device.
      Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/9599/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      8286ae03
  3. 19 2月, 2014 1 次提交
    • A
      cpu: add generic support for CPU feature based module autoloading · 67bad2fd
      Ard Biesheuvel 提交于
      This patch adds support for advertising optional CPU features over udev
      using the modalias, and for declaring compatibility with/dependency upon
      such a feature in a module.
      
      The mapping between feature numbers and actual features should be provided
      by the architecture in a file called <asm/cpufeature.h> which exports the
      following functions/macros:
      - cpu_feature(FEAT), a preprocessor macro that maps token FEAT to a
        numeric index;
      - bool cpu_have_feature(n), returning whether this CPU has support for
        feature #n;
      - MAX_CPU_FEATURES, an upper bound for 'n' in the previous function.
      
      The feature can then be enabled by setting CONFIG_GENERIC_CPU_AUTOPROBE
      for the architecture.
      
      For instance, a module that registers its module init function using
      
        module_cpu_feature_match(FEAT_X, module_init_function)
      
      will be probed automatically when the CPU's support for the 'FEAT_X'
      feature is advertised over udev, and will only allow the module to be
      loaded by hand if the 'FEAT_X' feature is supported.
      Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      67bad2fd
  4. 04 7月, 2013 1 次提交
    • A
      rapidio: add udev notification · 3bdbb62f
      Alexandre Bounine 提交于
      Add RapidIO-specific modalias generation to enable udev notifications
      about RapidIO-specific events.
      
      The RapidIO modalias string format is shown below:
      
      "rapidio:vNNNNdNNNNavNNNNadNNNN"
      
      Where:
      v  - Device Vendor ID (16 bit),
      d  - Device ID (16 bit),
      av - Assembly Vendor ID (16 bit),
      ad - Assembly ID (16 bit),
      
      as they are reported in corresponding Capability Registers (CARs)
      of each RapidIO device.
      Signed-off-by: NAlexandre Bounine <alexandre.bounine@idt.com>
      Cc: Matt Porter <mporter@kernel.crashing.org>
      Cc: Li Yang <leoli@freescale.com>
      Cc: Kumar Gala <galak@kernel.crashing.org>
      Cc: Andre van Herk <andre.van.herk@Prodrive.nl>
      Cc: Micha Nelissen <micha.nelissen@Prodrive.nl>
      Cc: Stef van Os <stef.van.os@Prodrive.nl>
      Cc: Jean Delvare <jdelvare@suse.de>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3bdbb62f
  5. 29 3月, 2013 1 次提交
  6. 25 1月, 2013 1 次提交