linux-toradex.git/include/linux/of_pci.h, branch v4.6-rc3

PCI: host: Add of_pci_get_host_bridge_resources() stub

2016-01-15T18:30:35+00:00

The pcie-rcar driver can be built for any ARM platform (for COMPILE_TEST)
including those without CONFIG_OF enabled, and that results in a
compile-time error:

  drivers/pci/host/pcie-rcar.c: In function 'rcar_pcie_parse_request_of_pci_ranges':
  drivers/pci/host/pcie-rcar.c:939:8: error: implicit declaration of function 'of_pci_get_host_bridge_resources' [-Werror=implicit-function-declaration]
    err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pci->resources, &iobase);

Add a of_pci_get_host_bridge_resources() stub function defined when
CONFIG_OF_ADDRESS is disabled to allow compile-testing on all platforms.
This mirrors what we do for other OF-specific functions.

Fixes: 5d2917d469fa ("PCI: rcar: Convert to DT resource parsing API")
Signed-off-by: Arnd Bergmann 
Signed-off-by: Bjorn Helgaas 
Acked-by: Wolfram Sang 
Acked-by: Simon Horman

Merge tag 'pm+acpi-4.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2015-11-12T19:50:33+00:00

Pull more power management and ACPI updates from Rafael Wysocki:
 "The only new feature in this batch is support for the ACPI _CCA device
  configuration object, which it a pre-requisite for future ACPI PCI
  support on ARM64, but should not affect the other architectures.

  The rest is fixes and cleanups, mostly in cpufreq (including
  intel_pstate), the Operating Performace Points (OPP) framework and
  tools (cpupower and turbostat).

  Specifics:

   - Support for the ACPI _CCA configuration object intended to tell the
     OS whether or not a bus master device supports hardware managed
     cache coherency and a new set of functions to allow drivers to
     check the cache coherency support for devices in a platform
     firmware interface agnostic way (Suravee Suthikulpanit, Jeremy
     Linton).

   - ACPI backlight quirks for ESPRIMO Mobile M9410 and Dell XPS L421X
     (Aaron Lu, Hans de Goede).

   - Fixes for the arm_big_little and s5pv210-cpufreq cpufreq drivers
     (Jon Medhurst, Nicolas Pitre).

   - kfree()-related fixup for the recently introduced CPPC cpufreq
     frontend (Markus Elfring).

   - intel_pstate fix reducing kernel log noise on systems where
     P-states are managed by hardware (Prarit Bhargava).

   - intel_pstate maintainers information update (Srinivas Pandruvada).

   - cpufreq core optimization related to the handling of delayed work
     items used by governors (Viresh Kumar).

   - Locking fixes and cleanups of the Operating Performance Points
     (OPP) framework (Viresh Kumar).

   - Generic power domains framework cleanups (Lina Iyer).

   - cpupower tool updates (Jacob Tanenbaum, Sriram Raghunathan, Thomas
     Renninger).

   - turbostat tool updates (Len Brown)"

* tag 'pm+acpi-4.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
  PCI: ACPI: Add support for PCI device DMA coherency
  PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()
  of/pci: Fix pci_get_host_bridge_device leak
  device property: ACPI: Remove unused DMA APIs
  device property: ACPI: Make use of the new DMA Attribute APIs
  device property: Adding DMA Attribute APIs for Generic Devices
  ACPI: Adding DMA Attribute APIs for ACPI Device
  device property: Introducing enum dev_dma_attr
  ACPI: Honor ACPI _CCA attribute setting
  cpufreq: CPPC: Delete an unnecessary check before the function call kfree()
  PM / OPP: Add opp_rcu_lockdep_assert() to _find_device_opp()
  PM / OPP: Hold dev_opp_list_lock for writers
  PM / OPP: Protect updates to list_dev with mutex
  PM / OPP: Propagate error properly from dev_pm_opp_set_sharing_cpus()
  cpufreq: s5pv210-cpufreq: fix wrong do_div() usage
  MAINTAINERS: update for intel P-state driver
  Creating a common structure initialization pattern for struct option
  cpupower: Enable disabled Cstates if they are below max latency
  cpupower: Remove debug message when using cpupower idle-set -D switch
  cpupower: cpupower monitor reports uninitialized values for offline cpus
  ...

PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()

2015-11-07T00:29:22+00:00

This patch move of_pci_dma_configure() to a more generic
pci_dma_configure(), which can be extended by non-OF code (e.g. ACPI).

This has no functional change.

Signed-off-by: Suravee Suthikulpanit 
Acked-by: Rob Herring 
Acked-by: Bjorn Helgaas 
Reviewed-by: Hanjun Guo 
Signed-off-by: Rafael J. Wysocki

of/pci: Add of_pci_check_probe_only to parse "linux,pci-probe-only"

2015-09-17T15:23:36+00:00

Both pci-host-generic and Pseries parse the "linux,pci-probe-only" property
to engage the PCI_PROBE_ONLY mode, and both have a subtle bug that can be
triggered if the property has no parameter.

Provide a generic, safe implementation that can be used by both.

[bhelgaas: fold in #include ]
Signed-off-by: Marc Zyngier 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Rob Herring

of/pci: Add of_pci_dma_configure() to update DMA configuration

2015-03-03T20:42:57+00:00

Add of_pci_dma_configure() to allow updating the DMA configuration of the
PCI device using the configuration from DT of the parent of the root bridge
device.  Use the newly added APIs pci_get/put_host_bridge_device() for
implementing this.

[bhelgaas: fold in fix for host bridges with no parent OF device]
Tested-by: Suravee Suthikulpanit  (AMD Seattle)
Signed-off-by: Murali Karicheri 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Catalin Marinas 
Acked-by: Rob Herring 
Acked-by: Will Deacon 
CC: Joerg Roedel 
CC: Grant Likely 
CC: Russell King 
CC: Arnd Bergmann

PCI/MSI: Rename "struct msi_chip" to "struct msi_controller"

2014-11-12T14:49:38+00:00

"msi_chip" isn't very descriptive, so rename it to "msi_controller".  That
tells a little more about what it does and is already used in device tree
bindings.

No functional change.

[bhelgaas: changelog, change *only* the struct name so it's reviewable]
Suggested-by: Bjorn Helgaas 
Signed-off-by: Yijing Wang 
Signed-off-by: Bjorn Helgaas

of/pci: Add support for parsing PCI host bridge resources from DT

2014-09-30T23:08:57+00:00

Provide a function to parse the PCI DT ranges that can be used to create a
pci_host_bridge structure together with its associated bus.

Signed-off-by: Liviu Dudau 
[make io_base parameter optional]
Signed-off-by: Robert Richter 
Signed-off-by: Bjorn Helgaas 
CC: Arnd Bergmann 
CC: Grant Likely 
CC: Rob Herring 
CC: Catalin Marinas

of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()

2014-09-30T23:08:57+00:00

Add pci_get_new_domain_nr() to allocate a new domain number and
of_get_pci_domain_nr() to retrieve the PCI domain number of a given device
from DT.  Host bridge drivers or architecture-specific code can choose to
implement their PCI domain number policy using these two functions.

Using of_get_pci_domain_nr() guarantees a stable PCI domain number on every
boot provided that all host bridge controllers are assigned a number in the
device tree using "linux,pci-domain" property.  Mixing use of
pci_get_new_domain_nr() and of_get_pci_domain_nr() is not recommended as it
can lead to potentially conflicting domain numbers being assigned to root
buses behind different host bridges.

Signed-off-by: Liviu Dudau 
Signed-off-by: Bjorn Helgaas 
CC: Arnd Bergmann 
CC: Grant Likely 
CC: Rob Herring 
CC: Catalin Marinas

of/irq: provide more wrappers for !CONFIG_OF

2014-06-04T09:45:46+00:00

The pci-rcar driver is enabled for compile tests, and this has
now shown that the driver cannot build without CONFIG_OF,
following the inclusion of f8f2fe7355fb "PCI: rcar: Use new OF
interrupt mapping when possible":

drivers/built-in.o: In function `rcar_pci_map_irq':
:(.text+0x1cc7c): undefined reference to `of_irq_parse_and_map_pci'
pci/host/pcie-rcar.c: In function 'pci_dma_range_parser_init':
pci/host/pcie-rcar.c:875:2: error: implicit declaration of function 'of_n_addr_cells' [-Werror=implicit-function-declaration]

As pointed out by Ben Dooks and Geert Uytterhoeven, this is actually
supposed to build fine, which we can achieve if we make the
declaration of of_irq_parse_and_map_pci conditional on CONFIG_OF
and provide an empty inline function otherwise, as we do for
a lot of other of interfaces.

This lets us build the rcar_pci driver again without CONFIG_OF
for build testing. All platforms using this driver select OF,
so this doesn't change anything for the users.

Signed-off-by: Arnd Bergmann 
Cc: devicetree@vger.kernel.org
Cc: Rob Herring 
Cc: Grant Likely 
Cc: Lucas Stach 
Cc: Bjorn Helgaas 
Cc: Magnus Damm 
Cc: Geert Uytterhoeven 
Cc: Ben Dooks 
Cc: linux-pci@vger.kernel.org
Cc: linux-sh@vger.kernel.org
[robh: drop wrappers for of_n_addr_cells and of_n_size_cells which are
low-level functions that should not be used for !OF]
Signed-off-by: Rob Herring

of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code.

2013-10-24T10:50:36+00:00

Several architectures open code effectively the same code block for
finding and mapping PCI irqs. This patch consolidates it down to a
single function.

Signed-off-by: Grant Likely 
Acked-by: Michal Simek 
Cc: Russell King 
Cc: Ralf Baechle 
Cc: Benjamin Herrenschmidt