xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/clock/armada3700-xtal-clock.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun* Xtal Clock bindings for Marvell Armada 37xx SoCs
2*4882a593Smuzhiyun
3*4882a593SmuzhiyunMarvell Armada 37xx SoCs allow to determine the xtal clock frequencies by
4*4882a593Smuzhiyunreading the gpio latch register.
5*4882a593Smuzhiyun
6*4882a593SmuzhiyunThis node must be a subnode of the node exposing the register address
7*4882a593Smuzhiyunof the GPIO block where the gpio latch is located.
8*4882a593SmuzhiyunSee Documentation/devicetree/bindings/pinctrl/marvell,armada-37xx-pinctrl.txt
9*4882a593Smuzhiyun
10*4882a593SmuzhiyunRequired properties:
11*4882a593Smuzhiyun- compatible : shall be one of the following:
12*4882a593Smuzhiyun	"marvell,armada-3700-xtal-clock"
13*4882a593Smuzhiyun- #clock-cells : from common clock binding; shall be set to 0
14*4882a593Smuzhiyun
15*4882a593SmuzhiyunOptional properties:
16*4882a593Smuzhiyun- clock-output-names : from common clock binding; allows overwrite default clock
17*4882a593Smuzhiyun	output names ("xtal")
18*4882a593Smuzhiyun
19*4882a593SmuzhiyunExample:
20*4882a593Smuzhiyunpinctrl_nb: pinctrl-nb@13800 {
21*4882a593Smuzhiyun	compatible = "armada3710-nb-pinctrl", "syscon", "simple-mfd";
22*4882a593Smuzhiyun	reg = <0x13800 0x100>, <0x13C00 0x20>;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun	xtalclk: xtal-clk {
25*4882a593Smuzhiyun		compatible = "marvell,armada-3700-xtal-clock";
26*4882a593Smuzhiyun		clock-output-names = "xtal";
27*4882a593Smuzhiyun		#clock-cells = <0>;
28*4882a593Smuzhiyun	};
29*4882a593Smuzhiyun};
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