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

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Date:	Thu, 08 Jan 2015 15:50:07 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Feng Kan <fkan@....com>, 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

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

Thanks
Hanjun
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