linux-kernel - Re: [PATCH] sata: xgene: add ACPI support for APM X-Gene SATA ports

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Date:	Fri, 09 Jan 2015 02:05:09 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Feng Kan <fkan@....com>
CC:	patches <patches@....com>, linux-ide@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Mark Salter <msalter@...hat.com>, tj@...nel.org,
	hdegoede@...hat.com
Subject: Re: [PATCH] sata: xgene: add ACPI support for APM X-Gene SATA ports

On 2015年01月09日 01:56, Feng Kan wrote:
> On Wed, Jan 7, 2015 at 11:50 PM, Hanjun Guo <hanjun.guo@...aro.org> wrote:
>> Hi Feng Kan,
>>
>> I have some comments below.
>>
>>
>> On 2015年01月08日 01:32, Feng Kan wrote:
>>>
>>> Just want to ping this again.
>>>
>>> Happy new year
>>>
>>> On Thu, Dec 11, 2014 at 2:31 PM, Feng Kan <fkan@....com> wrote:
>>>>
>>>> This adds ACPI support for the APM X-Gene SATA ports. When the system
>>>> boots using ACPI table, the SATA ports are able to configure using the
>>>> values supplied by the ACPI table rather than the DTS.
>>>>
>>>> Signed-off-by: Feng Kan <fkan@....com>
>>>> ---
>>>>    drivers/ata/ahci_xgene.c | 10 ++++++++++
>>>>    1 file changed, 10 insertions(+)
>>>>
>>>> diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
>>>> index d0c851a..4951392 100644
>>>> --- a/drivers/ata/ahci_xgene.c
>>>> +++ b/drivers/ata/ahci_xgene.c
>>>> @@ -22,6 +22,7 @@
>>>>     * NOTE: PM support is not currently available.
>>>>     *
>>>>     */
>>>> +#include <linux/acpi.h>
>>>>    #include <linux/module.h>
>>>>    #include <linux/platform_device.h>
>>>>    #include <linux/ahci_platform.h>
>>>> @@ -521,6 +522,14 @@ disable_resources:
>>>>           return rc;
>>>>    }
>>>>
>>>> +#ifdef CONFIG_ACPI
>>>> +static const struct acpi_device_id xgene_ahci_acpi_match[] = {
>>>> +       { "APMC0D0D", },
>>
>>
>> When I was going through the PNP and ACPI ID list in
>> http://www.uefi.org/PNP_ACPI_Registry, I found that
>> there is no "APMC" for ACPI ID, I only found that there is
>> a PNP ID "APM" for Applied Memory Tech company, are
>> you using PNP ID for this one?
>>
>> if not, I think you can send a request to UEFI and
>> request a new ACPI ID of "APMC" for Applied Micro, and then
>> submit the patch again.
>>
>> How to send a request to register the ACPI ID, you can
>> refer to:
>> http://www.uefi.org/PNP_ACPI_Registry
>
> Hanjun, the documents are bit out of sync. We have received approval and
> it is present in the document link below. I can also forward the approval letter
> if it needed.
>
> http://download.microsoft.com/download/7/E/7/7E7662CF-CBEA-470B-A97E-CE7CE0D98DC2/ISA%20PNPID%20List.xlsx

Sorry for missing this link, I think I should report this
inconsistency to ACPI spec working group and then update it
accordingly.

Thanks
Hanjun
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