[V5 PATCH 0/2] Introduce ACPI support for ahci_platform driver

[Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>]

This patch series introduce ACPI support for AHCI platform driver.
Existing ACPI support for AHCI assumes the device controller is a PCI device.
Since there is no ACPI _CID for generic AHCI controller, the driver
could not use it for matching devices. Therefore, this patch introduces
a mechanism for drivers to match devices using ACPI _CLS method.
_CLS contains PCI-defined class-code.

This patch series also modifies ACPI modalias to add class-code to the
exisiting format, which currently only uses _HID and _CIDs. This is required
to support loadable modules w/ _CLS.

This patch series is rebased from and tested with:

    http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v9

This topic was discussed earlier here (as part of introducing support for
AMD Seattle SATA controller):

    http://marc.info/?l=linux-arm-kernel&m=141083492521584&w=2

Changes from V4 (https://lkml.org/lkml/2015/3/2/56)
	* [1/2] Bug fixed: Reorder the declaration of
	  struct acpi_pnp_device_id cls in the struct acpi_device_info
	  (include/acpi/actypes.h) since compatible_id_list must be last one.
	* [2/2] Added Acked-by: Tejun Heo <tj@kernel.org>

Changes from V3 (https://lkml.org/lkml/2015/2/8/106)
	* Instead of introducing new structure acpi_device_cls, add cls into
	  the acpi_device_id, and modify the __acpi_match_device
	  to also match for cls. (per Mika suggestion.)
	* Add loadable module support, which requires changes in ACPI
	  modalias. (per Mika suggestion.)
	* Rebased and tested with acpi-5.1-v9

Changes from V2 (https://lkml.org/lkml/2015/1/5/662)
	* Update with review comment from Rafael in patch 1/2
	* Rebased and tested with acpi-5.1-v8

Changes from V1 (https://lkml.org/lkml/2014/12/19/345)
	* Rebased to 3.19.0-rc2
	* Change from acpi_cls in device_driver to acpi_match_cls (Hanjun comment)
	* Change the matching logic in acpi_driver_match_device() due to the new
	  special PRP0001 _HID.
	* Simplify the return type of acpi_match_device_cls() to boolean.

Changes from RFC (https://lkml.org/lkml/2014/12/17/446)
	* Remove #ifdef and make non-ACPI version of the acpi_match_device_cls
	  as inline. (per Arnd)
	* Simplify logic to retrieve and evaluate _CLS handle. (per Hanjun)

Suravee Suthikulpanit (2):
  ACPI / scan: Add support for ACPI _CLS device matching
  ata: ahci_platform: Add ACPI _CLS matching

 drivers/acpi/acpica/acutils.h     |  3 ++
 drivers/acpi/acpica/nsxfname.c    | 21 ++++++++++--
 drivers/acpi/acpica/utids.c       | 71 +++++++++++++++++++++++++++++++++++++++
 drivers/acpi/scan.c               | 17 ++++++++--
 drivers/ata/Kconfig               |  2 +-
 drivers/ata/ahci_platform.c       |  9 +++++
 include/acpi/acnames.h            |  1 +
 include/acpi/actypes.h            |  4 ++-
 include/linux/mod_devicetable.h   |  1 +
 scripts/mod/devicetable-offsets.c |  1 +
 scripts/mod/file2alias.c          | 13 +++++--
 11 files changed, 134 insertions(+), 9 deletions(-)

-- 
2.1.0