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

From: Hanjun Guo
Date: Thu Jan 08 2015 - 13:05:23 EST


On 2015å01æ09æ 01:56, Feng Kan wrote:
On Wed, Jan 7, 2015 at 11:50 PM, Hanjun Guo <hanjun.guo@xxxxxxxxxx> wrote:
Hi Feng Kan,

I have some comments below.


On 2015å01æ08æ 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@xxxxxxx> 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@xxxxxxx>
---
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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