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Message-ID: <FFD6E87BED20DB1B+38b8064e-9945-4cd8-a30e-7800a8c6f37b@radxa.com>
Date: Wed, 11 Dec 2024 09:06:40 +0900
From: FUKAUMI Naoki <naoki@...xa.com>
To: Sebastian Reichel <sebastian.reichel@...labora.com>,
Heiko Stuebner <heiko@...ech.de>
Cc: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, linux-rockchip@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v1 1/1] arm64: dts: rockchip: Add USB-C support to ROCK 5B
Sorry, I forgot to write one thing...
On 12/11/24 01:36, Sebastian Reichel wrote:
> Add hardware description for the USB-C port in the Radxa Rock 5 Model B.
> This describes the OHCI, EHCI and XHCI USB parts, but not yet the
> DisplayPort AltMode (bindings are not yet upstream).
>
> The fusb302 node is marked with status "fail", since the board is usually
> powered through the USB-C port. Handling of errors can result in hard
> resets, which removed the bus power for some time resulting in a board
> reset.
>
> The main problem is that devices are supposed to interact with the
> power-supply within 5 seconds after the plug event according to the
> USB PD specification. This is more or less impossible to achieve when
> the kernel is the first software communicating with the power-supply.
>
> Recent U-Boot (v2025.01) will start doing USB-PD communication, which
> solves this issue. Upstream U-Boot doing USB-PD communication will also
> set the fusb302 node status to "okay". That way booting a kernel with
> the updated DT on an old U-Boot avoids a reset loop.
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
Tested-by: FUKAUMI Naoki <naoki@...xa.com>
--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.
> ---
> .../boot/dts/rockchip/rk3588-rock-5b.dts | 121 ++++++++++++++++++
> 1 file changed, 121 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> index d597112f1d5b..cb5990df6ccb 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts
> @@ -5,6 +5,7 @@
> #include <dt-bindings/gpio/gpio.h>
> #include <dt-bindings/leds/common.h>
> #include <dt-bindings/soc/rockchip,vop2.h>
> +#include <dt-bindings/usb/pd.h>
> #include "rk3588.dtsi"
>
> / {
> @@ -84,6 +85,15 @@ rfkill-bt {
> shutdown-gpios = <&gpio3 RK_PD5 GPIO_ACTIVE_HIGH>;
> };
>
> + vcc12v_dcin: regulator-vcc12v-dcin {
> + compatible = "regulator-fixed";
> + regulator-name = "vcc12v_dcin";
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <12000000>;
> + regulator-max-microvolt = <12000000>;
> + };
> +
> vcc3v3_pcie2x1l0: regulator-vcc3v3-pcie2x1l0 {
> compatible = "regulator-fixed";
> enable-active-high;
> @@ -142,6 +152,7 @@ vcc5v0_sys: regulator-vcc5v0-sys {
> regulator-boot-on;
> regulator-min-microvolt = <5000000>;
> regulator-max-microvolt = <5000000>;
> + vin-supply = <&vcc12v_dcin>;
> };
>
> vcc_1v1_nldo_s3: regulator-vcc-1v1-nldo-s3 {
> @@ -264,6 +275,67 @@ regulator-state-mem {
> };
> };
>
> +&i2c4 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c4m1_xfer>;
> + status = "okay";
> +
> + usbc0: usb-typec@22 {
> + compatible = "fcs,fusb302";
> + reg = <0x22>;
> + interrupt-parent = <&gpio3>;
> + interrupts = <RK_PB4 IRQ_TYPE_LEVEL_LOW>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&usbc0_int>;
> + vbus-supply = <&vcc12v_dcin>;
> + /*
> + * When the board is starting to send power-delivery messages
> + * too late (5 seconds according to the specification), the
> + * power-supply reacts with a hard-reset. That removes the
> + * power from VBUS for some time, which resets te whole board.
> + */
> + status = "fail";
> +
> + usb_con: connector {
> + compatible = "usb-c-connector";
> + label = "USB-C";
> + data-role = "dual";
> + power-role = "sink";
> + try-power-role = "sink";
> + op-sink-microwatt = <1000000>;
> + sink-pdos =
> + <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>,
> + <PDO_VAR(5000, 20000, 5000)>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + usbc0_role_sw: endpoint {
> + remote-endpoint = <&dwc3_0_role_switch>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + usbc0_orien_sw: endpoint {
> + remote-endpoint = <&usbdp_phy0_orientation_switch>;
> + };
> + };
> +
> + port@2 {
> + reg = <2>;
> + dp_altmode_mux: endpoint {
> + remote-endpoint = <&usbdp_phy0_dp_altmode_mux>;
> + };
> + };
> + };
> + };
> + };
> +};
> +
> &i2c6 {
> status = "okay";
>
> @@ -423,6 +495,10 @@ usb {
> vcc5v0_host_en: vcc5v0-host-en {
> rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
> };
> +
> + usbc0_int: usbc0-int {
> + rockchip,pins = <3 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> };
> };
>
> @@ -835,6 +911,14 @@ &uart2 {
> status = "okay";
> };
>
> +&u2phy0 {
> + status = "okay";
> +};
> +
> +&u2phy0_otg {
> + status = "okay";
> +};
> +
> &u2phy1 {
> status = "okay";
> };
> @@ -866,6 +950,29 @@ &usbdp_phy1 {
> status = "okay";
> };
>
> +&usbdp_phy0 {
> + mode-switch;
> + orientation-switch;
> + sbu1-dc-gpios = <&gpio4 RK_PA6 GPIO_ACTIVE_HIGH>;
> + sbu2-dc-gpios = <&gpio4 RK_PA7 GPIO_ACTIVE_HIGH>;
> + status = "okay";
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + usbdp_phy0_orientation_switch: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&usbc0_orien_sw>;
> + };
> +
> + usbdp_phy0_dp_altmode_mux: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&dp_altmode_mux>;
> + };
> + };
> +};
> +
> &usb_host0_ehci {
> status = "okay";
> };
> @@ -874,6 +981,20 @@ &usb_host0_ohci {
> status = "okay";
> };
>
> +&usb_host0_xhci {
> + usb-role-switch;
> + status = "okay";
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + dwc3_0_role_switch: endpoint {
> + remote-endpoint = <&usbc0_role_sw>;
> + };
> + };
> +};
> +
> &usb_host1_ehci {
> status = "okay";
> };
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