Lines Matching +full:external +full:- +full:nodes

1 * Renesas R-Car USB 2.0 clock selector
3 This file provides information on what the device node for the R-Car USB 2.0
6 If you connect an external clock to the USB_EXTAL pin only, you should set
10 clock rates to both "usb_extal" and "usb_xtal" nodes.
12 Case 1: An external clock connects to R-Car SoC
13 	+----------+   +--- R-Car ---------------------+
14 	|External  |---|USB_EXTAL ---> all usb channels|
16 	+----------+   +-------------------------------+
19 Case 2: An oscillator connects to R-Car SoC
20 	+----------+   +--- R-Car ---------------------+
21 	|Oscillator|---|USB_EXTAL -+-> all usb channels|
22 	|          |---|USB_XTAL --+                   |
23 	+----------+   +-------------------------------+
27 - compatible: "renesas,r8a7795-rcar-usb2-clock-sel" if the device is a part of
29 	      "renesas,r8a7796-rcar-usb2-clock-sel" if the device if a part of
31 	      "renesas,r8a77961-rcar-usb2-clock-sel" if the device if a part of
33 	      "renesas,rcar-gen3-usb2-clock-sel" for a generic R-Car Gen3
36 	      When compatible with the generic version, nodes must list the
37 	      SoC-specific version corresponding to the platform first
40 - reg: offset and length of the USB 2.0 clock selector register block.
41 - clocks: A list of phandles and specifier pairs.
42 - clock-names: Name of the clocks.
43  - The functional clock of USB 2.0 host side must be "ehci_ohci"
44  - The functional clock of HS-USB side must be "hs-usb-if"
45  - The USB_EXTAL clock pin must be "usb_extal"
46  - The USB_XTAL clock pin must be "usb_xtal"
47 - #clock-cells: Must be 0
48 - power-domains: A phandle and symbolic PM domain specifier.
49                  See power/renesas,rcar-sysc.yaml.
50 - resets: A list of phandles and specifier pairs.
51 - reset-names: Name of the resets.
52  - The reset of USB 2.0 host side must be "ehci_ohci"
53  - The reset of HS-USB side must be "hs-usb-if"
55 Example (R-Car H3):
57 	usb2_clksel: clock-controller@e6590630 {
58 		compatible = "renesas,r8a7795-rcar-usb2-clock-sel",
59 			     "renesas,rcar-gen3-usb2-clock-sel";
63 		clock-names = "ehci_ohci", "hs-usb-if", "usb_extal", "usb_xtal";
64 		#clock-cells = <0>;
65 		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
67 		reset-names = "ehci_ohci", "hs-usb-if";