[PATCH 1/2] ARM: OMAP3: PM: remove superfluous calls to pwrdm_clear_all_prev_pwrst()

Paul Walmsley
2012-02-02T10:05:00Z

On Thu, 2 Feb 2012, Shilimkar, Santosh wrote:

> Yes, we do have issue with below APIs for OMAP4 and onwards design
> because of the PRCM change.
>
> pwrdm_clear_all_prev_pwrst
> pwrdm_*_mem_*
>
> There use to be a single power state and memory state register till OMAP3
> at power domain level which can give you the logic and memory last test
> which is needed for OSWR.
>
> On OMAP4, we have registers per modules and it becomes difficult to model
> this difference in APIs. Initially we tried to fix that with [1] and
> then later realized
> that's not going to work on OMAP4 + devices because of mentioned issue.

If the registers are per-module, it seems like the best place for those
would be the hwmod layer. Do you think that makes sense? So, something
like omap_hwmod_clear_all_prev_pwrst(), etc.? Seems like that should be
pretty efficient.

- Paul