linux-kernel - Re: [PATCH 0/3] Add AMBA bus probing support to ACPI

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Message-ID: <5632317A.40607@linaro.org>
Date:	Thu, 29 Oct 2015 22:47:22 +0800
From:	Shannon Zhao <shannon.zhao@...aro.org>
To:	Graeme Gregory <graeme.gregory@...aro.org>,
	linux-acpi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	Shannon Zhao <zhaoshenglong@...wei.com>
Subject: Re: [PATCH 0/3] Add AMBA bus probing support to ACPI



On 2015/9/30 18:38, Graeme Gregory wrote:
> As discussed when Shannon Zhao sent a patch to add platform_device support
> to pl061 driver. Russel and other maintainers prefered that ACPI learned
> how to create AMBA devices rather than converting/adding platform_device
> support to AMBA drivers.
>
> http://comments.gmane.org/gmane.linux.ports.arm.kernel/431364
>
> 1) Adds basic AMBA device probing support to ACPI, it uses a whitelist of
> device IDs as the number of AMBA devices is limited. Currently the two ids
> present are those used in QEMU for arm64.
>
> 2) Adds the plumbing into ACPI probe sequence.
>
> 3) From ACPI pl011 is only defined (SBSA document) to be in SBSA mode which has
> reduced functionality. There may be a better method to do this that I have
> overlooked.
>
Thanks. I test this patchset with PL061 on QEMU for arm64 through below 
patchset[1]. It works well.

Tested-by: Shannon Zhao <shannon.zhao@...aro.org>

[1] 
https://git.linaro.org/people/shannon.zhao/qemu.git/shortlog/refs/heads/PowerButton_v2

-- 
Shannon
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