Re: [V7 PATCH 0/3] Introduce ACPI support for ahci_platform driver

[Mark Salter <msalter@redhat.com>]

On Thu, 2015-03-26 at 14:13 -0500, Suravee Suthikulpanit wrote:
> 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 is rebased from and tested with:
> 
>     http://git.linaro.org/leg/acpi/acpi.git acpi-5.1-v11
> 
> 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 V6 (https://lkml.org/lkml/2015/3/25/797)
> 	* Adding Acked-by Mika, and Reviewed-by Hanjun
> 	* Minor clen up to use lower case 0xffffff for cls_msk
> 	  (per Mika suggestions).
> 	* Modify the ACPI_DEVICE_CLASS macro to use designated initializer
> 	  (per Mika suggestions).
> 
> Changes from V5 (https://lkml.org/lkml/2015/3/6/24)
> 	* Rebased and tested with acpi-5.1-v11
> 	* Splitting up the ACPICA changes into a separate patch [1/3].
> 	  (per Mika suggestion)
> 	* Adding class-code mask support (per Mika suggestion)
> 	* Use macro to define struct acpi_device_id entry (per Mika suggestion)
> 	* Note: Mika also recommend reordering the member of struct acpi_device_id
> 	  and define a macro to be used for declaring each table entry. This is a
> 	  large amount of changes, and will be done separtely from this patch series.
> 
> 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 (3):
>   ACPICA: Add ACPI _CLS processing
>   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               | 36 +++++++++++++++++---
>  drivers/ata/Kconfig               |  2 +-
>  drivers/ata/ahci_platform.c       |  9 +++++
>  include/acpi/acnames.h            |  1 +
>  include/acpi/actypes.h            |  4 ++-
>  include/linux/acpi.h              | 13 +++++++
>  include/linux/mod_devicetable.h   |  2 ++
>  scripts/mod/devicetable-offsets.c |  2 ++
>  scripts/mod/file2alias.c          | 32 ++++++++++++++++--
>  12 files changed, 186 insertions(+), 10 deletions(-)
> 

FWIW,

Tested-by: Mark Salter <msalter@redhat.com>