Hi,
I was looking at implementing a reset driver for our in-house SoC. It's
essentially a long bitfield, each bit controlling one sort of reset.
That seems to be surprisingly common. I've identified the following
drivers which control a very similar reset:
* reset-zynq
* reset-zx2967
* reset-sunxi
* reset-stm32
* reset-socfpga
* reset-oxynas
* reset-meson
* reset-berlin
All of these have in common some form of another of:
int bank = id / BITS_PER_LONG;
int offset = id % BITS_PER_LONG;
It doesn't make sense to me why all these would be duplicated for every
reset controller. I think it would make sense to have a common driver to
handle these simple resets -- call it "simple-reset". I'm thinking of
something similar to drivers/tty/serial/8250, where the following
parameters can be specified:
- reg-offset
- reg-shift
- reg-io-width
I think a generic "simple-reset" driver which is configurable by a
similar set of parameters would be a suitable replacement for all the
aforementioned drivers. As far as our SoC goes, I've just added
compatible = "st,stm32-rcc";
to our devicetree, and I already have a fully-working reset driver. Do
you think we should proceed in the direction of "simple-reset", and what
other features do you estimate we'll need?
Alex
