Bus framework

[Richard Zhao]

On 26 October 2011 14:39, Amit Kucheria <amit.kucheria at linaro.org> wrote:
> On 11 Oct 26, Richard Zhao wrote:
>> Hi Amit,
>>
>> Is there anyone working on a SoC bus framework?
>> The bus framework can manage the bus fabric, ddr, OCRAM clocks. When a
>> device driver become working, it tells bus framework, cpu may access
>> me (ip bus and related bus fabric on), I'm also a bus master, may
>> access ddr (ddr dma access +1 ). For bus framework, if ddr dma access
>> request is zero, ddr clk can be disabled in WFI/wait mode. The bus
>> framework manage the SoC bus topology.  If a bus switch use count is
>> zero, it can be disabled. It may even adjust the bus freq dynamically
>> according to bus request.
>
> Why can't this be handled in the PM runtime framework? Bus runtime drivers
> retain the logic for enabling/disabling the clocks and regulators required
> for the bus.
Yes, I think it could be part of PM runtime framework. I just need the
function described above. Can we do that now?

Regards
Richard
>
> /Amit
>
>