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 [off-list ref]
Intel Finland Oy