1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /*
3 * Copyright 2018 Alexander Monakov <amonakov@gmail.com>
4 */
5 /dts-v1/;
6
7 #include "berlin2cd.dtsi"
8 #include <dt-bindings/gpio/gpio.h>
9
10 / {
11 model = "Valve Steam Link";
12 compatible = "valve,steamlink", "marvell,berlin2cd", "marvell,berlin";
13
14 memory@0 {
15 device_type = "memory";
16 reg = <0x00000000 0x20000000>; /* 512 MB */
17 };
18
19 gpio-restart {
20 compatible = "gpio-restart";
21 gpios = <&porta 6 GPIO_ACTIVE_HIGH>;
22 active-delay = <100>;
23 inactive-delay = <10>;
24 wait-delay = <100>;
25 priority = <200>;
26 };
27 };
28
29 &cpu {
30 cpu-supply = <&vcpu>;
31 operating-points = <
32 /* kHz uV */
33 1000000 1325000
34 >;
35 };
36
37 &i2c0 {
38 status = "okay";
39
40 /* There are two regulators on the board. One is accessible via I2C,
41 * with buck1 providing SoC power (set up by bootloader to 1.325V or
42 * less depending on leakage value in OTP), and buck2 likely used for
43 * DRAM (providing 1.35V). The other regulator on the opposite side
44 * of the board is probably supplying SDIO and NAND fixed voltages. */
45 regulator@19 {
46 compatible = "marvell,88pg868";
47 reg = <0x19>;
48
49 vcpu: buck1 {
50 regulator-boot-on;
51 regulator-always-on;
52 regulator-min-microvolt = <1000000>;
53 regulator-max-microvolt = <1325000>;
54 };
55 };
56 };
57
58 /* Fixed interface to on-board Marvell 8897 Wi-Fi/Bluetooth/NFC chip. */
59 &sdhci0 {
60 keep-power-in-suspend;
61 non-removable;
62 status = "okay";
63 };
64
65 &uart0 {
66 /* RX/TX are routed to TP50/TP51 on the board. */
67 status = "okay";
68 };
69
70 /* The SoC is connected to on-board USB hub that in turn has one downstream
71 * port wired to the on-board Steam Controller wireless receiver chip. */
72 &usb_phy1 { status = "okay"; };
73
74 &usb1 {
75 dr_mode = "host";
76 status = "okay";
77 };
78
79 ð1 { status = "okay"; };
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