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Re: [Qemu-arm] [Qemu-devel] [PATCH 1/6] hw/char: QOM'ify pl011 model


From: Paolo Bonzini
Subject: Re: [Qemu-arm] [Qemu-devel] [PATCH 1/6] hw/char: QOM'ify pl011 model
Date: Fri, 27 May 2016 11:42:26 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0


On 27/05/2016 11:01, Peter Maydell wrote:
>> > I found bcm2835-peripherals is only used by bcm2836 code, you mean
>> > this(bcm2836) is the 'board level' and I should set chardev properties 
>> > here?
> Device models subclass DeviceClass (possibly indirectly).
> Boards subclass MachineClass. Only boards should be looking
> at serial_hds[]. Sometimes you have a device which is just
> a "container" which encapsulates several other devices
> (typically this is a model of an SoC). For that kind of
> container device, it should expose chardev properties for
> its UARTs, which will usually be alias properties for
> the properties on the actual UART devices which the
> container has.
> 
> bcm2835-peripherals is a device, not a board, so it shouldn't
> be using serial_hds[].
> 
> If it's clearer, you can use a separate patch to push the
> serial_hds[] usage out another layer, rather than folding
> it into this one.

I agree.  This patch is fine (perhaps with the FIXME comment left
there); then chardev properties can be added to bcm2835-peripherals and
set in bcm2836.

Thanks,

Paolo



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