uio_pruss: add support for devicetree and am33xx

Quoted 8 lines · Andre Heider

Quoted 7 lines · Andre Heider

this series adds PRUv2 support to uio_pruss through devicetree, makes the device usable on am33xx and enables it on beaglebone black. Inspired by old patches from Matt Porter found in a downstream tree.

To archieve that this series:
* adds a flag to omap_hwmod.c to get PRUSS out of hardreset (patch 5 and 6)

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Quoted 6 lines

Quoted 6 lines

* is the hardreset thing I did there the right thing to do? I think the proper way would be a reset controller (which apparently doesn't yet exist for this SoC?) and let the driver deassert/assert on probe/remove?
* the platform device path has a clk_enable() / clk_put() calls. Are those now redundant with the introduced pm_runtime_enable() pm_runtime_disable() calls?

Probably you only need pm_runtime_{get,put}_*() calls, unless you're changing clock parents or rates in your driver code.

Quoted 2 lines

@OMAP guys: any comments? The series depends on patch 5 and 6; both touch common hwmod code.

I'd suggest splitting the series into three independent pieces if possible:

1. UIO code, for the UIO maintainer(s)
2. DT pieces for Tony
3. hwmod pieces for me

That way they can be cleanly merged by the respective maintainers.