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Re: [Qemu-devel] [PATCH v2 0/8] Add system_powerdown support on ARM for
From: |
Shannon Zhao |
Subject: |
Re: [Qemu-devel] [PATCH v2 0/8] Add system_powerdown support on ARM for ACPI and DT |
Date: |
Wed, 11 Nov 2015 09:29:04 +0800 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 2015/11/11 4:56, Wei Huang wrote:
>
>>
>> Compared with v1, this version doesn't work with system_powerdown
>> command. In my setup, the testing environment is exactly same for both
>> v1 and v2. So something changed in v2 caused system_powerdown fail to work.
>>
>
> I found this was caused by the change of "_HID" name for GPIO device. It
> was changed from "LNRO0009" (v1) to "ARMH0061" (v2), which doesn't match
> with my stock guest kernel PL061 driver. After changing the guest
> kernel, it is working again. So:
>
Hi Wei,
Thanks very much for your help. The reason why I change the _HID is
based on the _HID 0f PL011 which is ARMH0011. About the _HID of ARM
company's devices, I have to say that I didn't see which _HID they
should be at any public place. I heard(maybe it's not correct) there is
a _HID list of ARM devices. If so, I think ARM should publish them in
public, otherwise the only thing we can do is to guess or refer to
existing _HID.
BTW, I think you could use this kernel patches[1] which adds ACPI
support for AMBA device and drop the previous one.
[1] https://lkml.org/lkml/2015/9/30/392
> Tested-by: Wei Huang <address@hidden>
>
> I will provide reviews to each individual patches.
>
Thanks again. :)
--
Shannon