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

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Message-ID: <54ADA7B2.8000205@amd.com>
Date:	Wed, 7 Jan 2015 15:40:02 -0600
From:	Suravee Suthikulanit <suravee.suthikulpanit@....com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
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 1/5/2015 5:24 PM, Rafael J. Wysocki wrote:
> 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!
>

Thanks Rafael.

Suravee

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