On 1/5/2015 5:24 PM, Rafael J. Wysocki wrote:

On Monday, January 05, 2015 03:11:13 PM Suravee Suthikulpanit wrote:

quoted

This patch series introduce ACPI support for non-PCI AHCI platform driver.
Existing ACPI support for AHCI assumes the device controller is a PCI device.

Also, since there is no ACPI _HID/_CID for generic AHCI controller, the driver
could not use them for matching devices. Therefore, this patch introduces
a mechanism for drivers to match devices using ACPI _CLS method.

This patch series is rebased from and tested with:

     http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v7

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

NOTE:
	* PATCH 2/2 has already been Acked-by Tejun Heo in V1. I only made
	  a minor renaming of the acpi_cls to acpi_match_cls for clarity
	  in V2. It probably should be routed together with the PATCH 1/2
	  (once acked) since it defines the new member in the struct.

Changes 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/scan.c             | 79 +++++++++++++++++++++++++++++++++++++++--
  drivers/ata/Kconfig             |  2 +-
  drivers/ata/ahci_platform.c     |  3 ++
  include/acpi/acnames.h          |  1 +
  include/linux/acpi.h            | 10 ++++++
  include/linux/device.h          |  1 +
  include/linux/mod_devicetable.h |  6 ++++
  7 files changed, 98 insertions(+), 4 deletions(-)

I'll take care of this when I'm back from travels later this month.  Thanks!

Thanks Rafael.

Suravee