device-tree-bindings/gpio/gpio.txt

143 controllers. The gpio-ranges property described below represents this, and
159 In case named gpio ranges are used (ranges with both <pinctrl-base> and
160 <count> set to 0), the property gpio-ranges-group-names contains one string
161 for every single-gpio-range in gpio-ranges:
166 Elements of gpiorange-names-list corresponding to numeric ranges contain
168 ranges contain the name of a pin group defined in the respective pin
173 were referenced by any gpio-ranges property to contain a property named
186 		gpio-ranges = <&pinctrl1 0 20 10>, <&pinctrl2 10 50 20>;
200 		gpio-ranges =			<&pinctrl1 0 20 10>,
204 		gpio-ranges-group-names =	"",
210 Here, three GPIO ranges are defined wrt. two pin controllers. pinctrl1 GPIO
211 ranges are defined using pin numbers whereas the GPIO ranges wrt. pinctrl2