[PATCH 0/2] drivers: PL061: Add platform driver probing support
Shannon Zhao
zhaoshenglong at huawei.com
Mon Aug 3 02:26:05 PDT 2015
Hi Russell,
On 2015/8/3 15:58, Russell King - ARM Linux wrote:
> On Mon, Aug 03, 2015 at 02:59:56PM +0800, Shannon Zhao wrote:
>> From: Shannon Zhao <shannon.zhao at linaro.org>
>>
>> According to ACPI SPEC, it supports ARM boards to use "GPIO-signaled
>> ACPI Events". These events can be used for input events. And to QEMU, it
>> uses GPIO PL061 controller for input events.
>>
>> These two patches add platform driver support for PL061 probed by DT or
>> ACPI.
>
> This certainly is incorrect for DT, and is probably wrong for ACPI too.
> DT creates amba devices, so binds via the amba device driver.
>
Oh, sorry. The changes for DT are not necessary. But for ACPI I think it
needs to convert pl061 to platform device since ACPI doesn't support
AMBA devices. The Pl011 also does the same thing to support ACPI
probing. See drivers/tty/serial/amba-pl011.c
Thanks,
--
Shannon
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