Add Qualcomm Technologies, Inc. Talos EVK SMARC support

Add the device tree for the QCS615-based Talos EVK platform. The platform is composed of a System-on-Module following the SMARC standard, and a Carrier Board.

The Carrier Board supports several display configurations, HDMI and LVDS. Both configurations use the same base hardware, with the display selection controlled by a DIP switch.

Use a DTBO file, talos-evk-lvds-auo,g133han01.dtso, which defines an overlay that disables HDMI and adds LVDS. The DTs file talos-evk can describe the HDMI display configurations.

According to the hardware design and vendor guidance, the WiFi PA supplies VDD_PA_A and VDD_PA_B only need to be enabled at the same time as asserting WLAN_EN.

On this platform, WiFi enablement is controlled via the WLAN_EN GPIO (GPIO84), which also drives the VDD_PA_A and VDD_PA_B power enables. Remove the VDD_PA_A and VDD_PA_B regulator nodes from the device tree and rely on WLAN_EN to enable WiFi functionality.

Add talos-evk-usb1-peripheral.dtso overlay to enable USB0 peripheral (EDL) mode. The base DTS will keep USB0 host-only due to hardware routing through the EDL DIP switch, and the overlay switches the configuration for device-mode operation.

The LVDS backlight hardware has been updated to use a simplified design. The backlight enable signal is now permanently pulled up to 3.3V and is no longer controlled via GPIO59.

Remove the GPIO59 based backlight configuration from the device tree, as it is no longer routed to the LVDS interface.

The initial device tree includes support for:
- CPU and memory
- UART
- GPIOs
- Regulators
- PMIC
- Early console
- AT24MAC602 EEPROM
- MCP2515 SPI to CAN
- ADV7535 DSI-to-HDMI bridge
- DisplayPort interface
- SN65DSI84ZXHR DSI-to-LVDS bridge
- Wi-Fi/BT

Reviewed-by Dmitry Baryshkov <[email protected]>

Reviewed-by Konrad Dybcio <[email protected]>

Signed-off-by Sudarshan Shetty <[email protected]>

---
 arch/arm64/boot/dts/qcom/Makefile             |   6 +
 .../qcom/talos-evk-lvds-auo,g133han01.dtso    | 127 ++++
 arch/arm64/boot/dts/qcom/talos-evk-som.dtsi   | 614 ++++++++++++++++++
 .../dts/qcom/talos-evk-usb1-peripheral.dtso   |  10 +
 arch/arm64/boot/dts/qcom/talos-evk.dts        | 139 ++++
 5 files changed, 896 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-lvds-auo,g133han01.dtso
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-som.dtsi
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk.dts

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi new file +35 -0

+
+	vreg_conn_1p8: regulator-conn-1p8 {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_conn_1p8";
+		startup-delay-us = <4000>;
+		enable-active-high;
+		gpio = <&pm8150_gpios 1 GPIO_ACTIVE_HIGH>;
+	};
+
+	vreg_conn_pa: regulator-conn-pa {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_conn_pa";
+		startup-delay-us = <4000>;
+		enable-active-high;
+		gpio = <&pm8150_gpios 6 GPIO_ACTIVE_HIGH>;
+	};
+
+	vreg_v3p3_can: regulator-v3p3-can {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg-v3p3-can";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	vreg_v5p0_can: regulator-v5p0-can {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg-v5p0-can";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi new file +27 -0

+
+/*
+ * USB0 routing and EDL mode:
+ *
+ * The USB0 controller’s HS differential pair is switched (manually)
+ * between the Micro-USB port for EDL/ADB and the on-board USB 3.0 hub.
+ *
+ * During EDL (Emergency Download) mode, the HS lines are explicitly
+ * routed to the Micro-USB port to allow the SoC to enter device mode
+ * for flashing.
+ *
+ * After EDL the switch is normally toggled so the HS lines stay
+ * connected to the hub’s Type-A downstream ports, leaving no electrical
+ * path to the Micro-USB connector — therefore USB0 runs host-only in
+ * normal runtime and device mode must not be advertised.
+ *
+ * USB0 is configured host-only in the base device tree; a separate
+ * device-tree overlay enables the Micro-USB peripheral configuration for
+ * ADB. For ADB to work during normal runtime the DIP switch SW1 must be
+ * manually toggled to the off position (reconnecting the HS pair to the
+ * Micro-USB port).
+ */
+
+&usb_1 {
+	status = "okay";
+};
+

arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso new file +0 -0

new file mode 100644
index 000000000000..2f4630a6ba66

arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso new file +4 -0

+
+&usb_1_dwc3 {
+        dr_mode = "peripheral";
+};

Quoted 61 lines · Sudarshan Shetty

Add the device tree for the QCS615-based Talos EVK platform. The platform is composed of a System-on-Module following the SMARC standard, and a Carrier Board.

The Carrier Board supports several display configurations, HDMI and LVDS. Both configurations use the same base hardware, with the display selection controlled by a DIP switch.

Use a DTBO file, talos-evk-lvds-auo,g133han01.dtso, which defines an overlay that disables HDMI and adds LVDS. The DTs file talos-evk can describe the HDMI display configurations.

According to the hardware design and vendor guidance, the WiFi PA supplies VDD_PA_A and VDD_PA_B only need to be enabled at the same time as asserting WLAN_EN.

On this platform, WiFi enablement is controlled via the WLAN_EN GPIO (GPIO84), which also drives the VDD_PA_A and VDD_PA_B power enables. Remove the VDD_PA_A and VDD_PA_B regulator nodes from the device tree and rely on WLAN_EN to enable WiFi functionality.

Add talos-evk-usb1-peripheral.dtso overlay to enable USB0 peripheral (EDL) mode. The base DTS will keep USB0 host-only due to hardware routing through the EDL DIP switch, and the overlay switches the configuration for device-mode operation.

The LVDS backlight hardware has been updated to use a simplified design. The backlight enable signal is now permanently pulled up to 3.3V and is no longer controlled via GPIO59.

Remove the GPIO59 based backlight configuration from the device tree, as it is no longer routed to the LVDS interface.

The initial device tree includes support for:
- CPU and memory
- UART
- GPIOs
- Regulators
- PMIC
- Early console
- AT24MAC602 EEPROM
- MCP2515 SPI to CAN
- ADV7535 DSI-to-HDMI bridge
- DisplayPort interface
- SN65DSI84ZXHR DSI-to-LVDS bridge
- Wi-Fi/BT

Reviewed-by Dmitry Baryshkov <[email protected]>

Reviewed-by Konrad Dybcio <[email protected]>

Signed-off-by Sudarshan Shetty <[email protected]>

---
 arch/arm64/boot/dts/qcom/Makefile             |   6 +
 .../qcom/talos-evk-lvds-auo,g133han01.dtso    | 127 ++++
 arch/arm64/boot/dts/qcom/talos-evk-som.dtsi   | 614 ++++++++++++++++++
 .../dts/qcom/talos-evk-usb1-peripheral.dtso   |  10 +
 arch/arm64/boot/dts/qcom/talos-evk.dts        | 139 ++++
 5 files changed, 896 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-lvds-auo,g133han01.dtso
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-som.dtsi
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso
 create mode 100644 arch/arm64/boot/dts/qcom/talos-evk.dts

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi line 53

Quoted 10 lines

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi new file +10 -0

+
+	regulator-usb2-vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "USB2_VBUS";
+		gpio = <&pm8150_gpios 10 GPIO_ACTIVE_HIGH>;
+		pinctrl-0 = <&usb2_en>;
+		pinctrl-names = "default";
+		enable-active-high;
+		regulator-always-on;
+	};

Hmm. I hoped that we are past this stage. Please order the nodes.

Quoted 35 lines

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi new file +35 -0

+
+	vreg_conn_1p8: regulator-conn-1p8 {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_conn_1p8";
+		startup-delay-us = <4000>;
+		enable-active-high;
+		gpio = <&pm8150_gpios 1 GPIO_ACTIVE_HIGH>;
+	};
+
+	vreg_conn_pa: regulator-conn-pa {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg_conn_pa";
+		startup-delay-us = <4000>;
+		enable-active-high;
+		gpio = <&pm8150_gpios 6 GPIO_ACTIVE_HIGH>;
+	};
+
+	vreg_v3p3_can: regulator-v3p3-can {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg-v3p3-can";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	vreg_v5p0_can: regulator-v5p0-can {
+		compatible = "regulator-fixed";
+		regulator-name = "vreg-v5p0-can";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+

[...]

Quoted 27 lines

arch/arm64/boot/dts/qcom/talos-evk-som.dtsi new file +27 -0

+
+/*
+ * USB0 routing and EDL mode:
+ *
+ * The USB0 controller’s HS differential pair is switched (manually)
+ * between the Micro-USB port for EDL/ADB and the on-board USB 3.0 hub.
+ *
+ * During EDL (Emergency Download) mode, the HS lines are explicitly
+ * routed to the Micro-USB port to allow the SoC to enter device mode
+ * for flashing.
+ *
+ * After EDL the switch is normally toggled so the HS lines stay
+ * connected to the hub’s Type-A downstream ports, leaving no electrical
+ * path to the Micro-USB connector — therefore USB0 runs host-only in
+ * normal runtime and device mode must not be advertised.
+ *
+ * USB0 is configured host-only in the base device tree; a separate
+ * device-tree overlay enables the Micro-USB peripheral configuration for
+ * ADB. For ADB to work during normal runtime the DIP switch SW1 must be
+ * manually toggled to the off position (reconnecting the HS pair to the
+ * Micro-USB port).
+ */
+
+&usb_1 {
+	status = "okay";
+};
+

arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso line 6

Quoted 12 lines

arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso new file +6 -0

new file mode 100644
index 000000000000..2f4630a6ba66
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+/dts-v1/;
+/plugin/;

Comment, what should be changed to make use of it.

Quoted 4 lines

arch/arm64/boot/dts/qcom/talos-evk-usb1-peripheral.dtso new file +4 -0

+
+&usb_1_dwc3 {
+        dr_mode = "peripheral";
+};