On 26 October 2011 14:39, Amit Kucheria amit.kucheria@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