Re: [PATCH 0/4] Qualcomm Shared Memory State Machines

[Mark Brown <broonie@kernel.org>]

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On Tue, Sep 08, 2015 at 02:20:14PM +0200, Linus Walleij wrote:
> On Thu, Aug 27, 2015 at 7:37 PM, Bjorn Andersson
> <bjorn.andersson@sonymobile.com> wrote:

> Let's discuss this a bit, looping in Mark Brown.

Please don't send upstream discussions ot my work address.

> While sparsely documented: what about regmap (maybe in the
> form of syscon) and drivers/base/regmap/regmap-irq.c for the
> interrupt handling?

> I cannot claim to understand regmap-irq.c, but I just intuitively
> think it deserves consideration, such that drivers who need one
> of these misc registers can read/write their bits with regmap
> accessors and also get IRQs by way of regmap-irq.

Well, all it's doing is exporting a simple register based interrupt
controller based on regmap.  There's not a lot to document.  If you're
using it with a system controller you'd probably want to implement
support for handling interrupts directly in the primary handler rather
than using a threaded handler.  Alternatively if there's no cache or no
overlap between interrupt registers and other registers then just using
the genirq MMIO code should do the trick.

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