linux-kernel - Re: [V2 PATCH 0/2] Introduce ACPI support for ahci

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Date:	Tue, 06 Jan 2015 00:24:01 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Cc:	lenb@...nel.org, hdegoede@...hat.com, tj@...nel.org, arnd@...db.de,
	mjg59@...f.ucam.org, grant.likely@...aro.org,
	hanjun.guo@...aro.org, al.stone@...aro.org,
	graeme.gregory@...aro.org, leo.duran@....com,
	linux-ide@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org
Subject: Re: [V2 PATCH 0/2] Introduce ACPI support for ahci_platform driver

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

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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