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

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Date:	Tue, 13 Jan 2015 14:29:30 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Suman Tripathi <stripathi@....com>
CC:	Feng Kan <fkan@....com>, patches <patches@....com>,
	"linux-ide@...r.kernel.org" <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>, Tejun Heo <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13日 05:07, Suman Tripathi wrote:
> Hi,
>
> Tested-by: Suman Tripathi <stripathi@....com>
>
> On Thu, Jan 8, 2015 at 11:35 PM, Hanjun Guo <hanjun.guo@...aro.org
> <mailto:hanjun.guo@...aro.org>> wrote:
>
>     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 <mailto: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
>                 <mailto: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
>                     <mailto: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
>             <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
>             <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
>         <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.

Also I had reported this issue to ASWG and some people will
check with this issue and fix it, so

Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>

Thanks
Hanjun
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