1* Xtal Clock bindings for Marvell Armada 37xx SoCs 2 3Marvell Armada 37xx SoCs allow to determine the xtal clock frequencies by 4reading the gpio latch register. 5 6This node must be a subnode of the node exposing the register address 7of the GPIO block where the gpio latch is located. 8 9Required properties: 10- compatible : shall be one of the following: 11 "marvell,armada-3700-xtal-clock" 12- #clock-cells : from common clock binding; shall be set to 0 13 14Optional properties: 15- clock-output-names : from common clock binding; allows overwrite default clock 16 output names ("xtal") 17 18Example: 19gpio1: gpio@13800 { 20 compatible = "marvell,armada-3700-gpio", "syscon", "simple-mfd"; 21 reg = <0x13800 0x1000>; 22 23 xtalclk: xtal-clk { 24 compatible = "marvell,armada-3700-xtal-clock"; 25 clock-output-names = "xtal"; 26 #clock-cells = <0>; 27 }; 28}; 29