On Wed, Feb 10, 2016 at 11:04:36AM -0800, Stephen Boyd wrote:

> I don't follow the rest of your mail though. Are you suggesting
> that in this case we put the regulator control into the PMIC
> regulator driver (qcom_spmi-regulator.c) and then use a
> syscon/regmap there to change the voltages inside the MMIO bus?
> That may work but we're going to need to update the binding for
> the SPMI regulator driver then.

No, why would you want to do that?  I'm saying that if the device has a
SPMI interface make that the primary interface for the driver.
Presumably the SPMI bus abstraction is capable of representing this
fairly directly.

> I'm not really excited about the binding we have here either.
> We're going to have two places in DT where we've created a
> regulator for the same physical regulator. One will be a child of
> the SAW node on the MMIO bus, and another will be a child of the
> PMIC on the SPMI/SSBI bus. In the end, they're both the same
> regulator, so any constraints on one node will need to be applied
> to the other node as well.

Are you saying that this is a problem with the driver that just got
merged?  We got to v4 before I applied the driver...  My understanding
was that this is a driver for a new regulator type not a duplicate
interface for existing regulator.