dt-bindings: i2c: add support for 'i2c-arb' subnode

This gets rid of the need for a pointless 'reg' property for i2c
arbitrators.

I.e. this new and more compact style

	some-arbitrator {
		i2c-arb {
			#address-cells = <1>;
			#size-cells = <0>;

			some-i2c-device@50 {
				reg = <0x50>;
			};
		};
	};

instead of the old

	some-arbitrator {
		#address-cells = <1>;
		#size-cells = <0>;

		i2c@0 {
			reg = <0>;

			#address-cells = <1>;
			#size-cells = <0>;

			some-i2c-device@50 {
				reg = <0x50>;
			};
		};
	};

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Peter Rosin <peda@axentia.se>

1 files changed, 1 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 0bbe4b105c34..cde3e729df2c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5667,6 +5667,7 @@ S:	Maintained
 F:      Documentation/i2c/i2c-topology
 F:      Documentation/i2c/muxes/
 F:      Documentation/devicetree/bindings/i2c/i2c-mux*
+F:      Documentation/devicetree/bindings/i2c/i2c-arb*
 F:      drivers/i2c/i2c-mux.c
 F:      drivers/i2c/muxes/
 F:      include/linux/i2c-mux.h