GPIO controller.
Required properties for sub-nodes are:
- - reg: should contain address and size for mux, pull-enable, pull and
- gpio register sets
- - reg-names: an array of strings describing the "reg" entries. Must
- contain "mux", "pull" and "gpio". "pull-enable" is optional and
- when it is missing the "pull" registers are used instead
+ - reg: should contain a list of address and size, one tuple for each entry
+ in reg-names.
+ - reg-names: an array of strings describing the "reg" entries.
+ Must contain "mux" and "gpio".
+ May contain "pull", "pull-enable" and "ds" when appropriate.
- gpio-controller: identifies the node as a gpio controller
- #gpio-cells: must be 2