[PATCH v15 07/12] ARM: dts: append hip04 dts

Haojian Zhuang haojian.zhuang at linaro.org
Tue Jul 29 05:15:45 PDT 2014

On 29 July 2014 20:13, Will Deacon <will.deacon at arm.com> wrote:
> On Tue, Jul 29, 2014 at 12:32:09PM +0100, Haojian Zhuang wrote:
>> On 29 July 2014 19:12, Will Deacon <will.deacon at arm.com> wrote:
>> > On Tue, Jul 29, 2014 at 04:53:21AM +0100, Olof Johansson wrote:
>> >> On Tue, Jul 29, 2014 at 10:44:40AM +0800, Haojian Zhuang wrote:
>> >> > Because I didn't get these materials yet. All clocks are enabled in bootloader.
>> >>
>> >> What materials? Technical documentation for the CPU you're upstreaming?
>> >>
>> >> It seems like a very bad idea to upstream a DT for a CPU that you don't
>> >> have documentation for. It seems appropriate to wait until you have
>> >> documentation so you can make sure that the hardware you're describing
>> >> is actually what is there, and not something made-up or misdescribed.
>> >
>> > I completely agree. Furthermore, given that this SoC implements a dodgy
>> > custom GIC, I don't think it's unreasonable for us to ask for documentation
>> > describing that too, otherwise it's going to make maintaining a complicated
>> > irqchip driver that much worse.
>> >
>> I don't have enough documents on clocks. And all clocks are already
>> enabled in UEFI. There're also no requirement on change the clock
>> frequency & disable them. So I set all these clocks as fixed rate.
>> It's different from GIC. If I don't have documents on GIC, I can't
>> write code for HIP04 GIC. HiP04 GIC supports 16-cores. ARM GICv2
>> supports 8-cores. So some registers offsets and bit fields are
>> different from GICv2.
> Sure, and I'm asking for those documents to be made publicly available
> somewhere so that we can refer to them if we need to change this code in
> future.
> Will

I can send the copy to you since it's already public. But the main
issue is that this document is written in Chinese. I hope it could be
written in English.


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