Re: [PATCH v2 1/3] dt-bindings: pinctrl: Add a reserved-gpio-ranges property

From: Andy Shevchenko
Date: Fri Jan 26 2018 - 04:20:39 EST


On Thu, 2018-01-25 at 17:13 -0800, Stephen Boyd wrote:
> Some qcom platforms make some GPIOs or pins unavailable for use
> by non-secure operating systems, and thus reading or writing the
> registers for those pins will cause access control issues.
> Introduce a DT property to describe the set of GPIOs that are
> available for use so that higher level OSes are able to know what
> pins to avoid reading/writing.

> gpio-controller;
> #gpio-cells = <2>;
> ngpios = <18>;
> + reserved-gpio-ranges = <0 4>, <12 2>;

What about preserving namespace, i.e.

gpio-reserved-ranges vs. your variant?

--
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy