--- /dev/null
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2024 Marek Vasut <marex@denx.de>
+ *
+ * DHCOM iMX8MP variant:
+ * DHCM-iMX8ML8-C160-R204-F1638-SPI16-E2-CAN2-RTC-I-01D2
+ * DHCOM PCB number: 660-100 or newer
+ * DRC02 PCB number: 568-100 or newer
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/phy/phy-imx8-pcie.h>
+#include "imx8mp-dhcom-som.dtsi"
+
+/ {
+ model = "DH electronics i.MX8M Plus DHCOM on DRC02";
+ compatible = "dh,imx8mp-dhcom-drc02", "dh,imx8mp-dhcom-som",
+ "fsl,imx8mp";
+
+ chosen {
+ stdout-path = &uart1;
+ };
+};
+
+&eqos { /* First ethernet */
+ pinctrl-0 = <&pinctrl_eqos_rmii>;
+ phy-handle = <ðphy0f>;
+ phy-mode = "rmii";
+
+ assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_266M>,
+ <&clk IMX8MP_SYS_PLL2_100M>,
+ <&clk IMX8MP_SYS_PLL2_50M>;
+ assigned-clock-rates = <0>, <100000000>, <50000000>;
+};
+
+ðphy0g { /* Micrel KSZ9131RNXI */
+ status = "disabled";
+};
+
+ðphy0f { /* SMSC LAN8740Ai */
+ status = "okay";
+};
+
+&fec { /* Second ethernet */
+ pinctrl-0 = <&pinctrl_fec_rmii>;
+ phy-handle = <ðphy1f>;
+ phy-mode = "rmii";
+ status = "okay";
+
+ assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_266M>,
+ <&clk IMX8MP_SYS_PLL2_100M>,
+ <&clk IMX8MP_SYS_PLL2_50M>,
+ <&clk IMX8MP_SYS_PLL2_50M>;
+ assigned-clock-rates = <0>, <100000000>, <50000000>, <0>;
+};
+
+ðphy1f { /* SMSC LAN8740Ai */
+ status = "okay";
+};
+
+&flexcan1 {
+ status = "okay";
+};
+
+&flexcan2 {
+ status = "okay";
+};
+
+&gpio1 {
+ gpio-line-names =
+ "DRC02-In1", "", "", "", "", "DHCOM-I", "DRC02-HW2", "DRC02-HW0",
+ "DHCOM-B", "DHCOM-A", "", "DHCOM-H", "", "", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "";
+
+ /*
+ * NOTE: On DRC02, the RS485_RX_En is controlled by a separate
+ * GPIO line, however the i.MX8 UART driver assumes RX happens
+ * during TX anyway and that it only controls drive enable DE
+ * line. Hence, the RX is always enabled here.
+ */
+ rs485-rx-en-hog {
+ gpio-hog;
+ gpios = <13 0>; /* GPIO Q */
+ line-name = "rs485-rx-en";
+ output-low;
+ };
+};
+
+&gpio2 {
+ gpio-line-names =
+ "", "", "", "", "", "", "", "",
+ "DHCOM-O", "DHCOM-N", "", "SOM-HW1", "", "", "", "",
+ "", "", "", "", "DRC02-In2", "", "", "",
+ "", "", "", "", "", "", "", "";
+};
+
+&gpio3 {
+ gpio-line-names =
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "SOM-HW0", "",
+ "", "", "", "", "", "", "SOM-MEM0", "SOM-MEM1",
+ "SOM-MEM2", "SOM-HW2", "", "", "", "", "", "";
+};
+
+&gpio4 {
+ gpio-line-names =
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "SOM-HW1", "", "", "", "",
+ "", "", "", "DRC02-Out2", "", "", "", "";
+};
+
+&gpio5 {
+ gpio-line-names =
+ "", "", "DHCOM-C", "", "", "", "", "",
+ "", "", "", "", "", "", "", "",
+ "", "", "", "", "", "", "DHCOM-E", "DRC02-Out1",
+ "", "", "", "", "", "", "", "";
+};
+
+/* No HS connector on this SoM variant, so no HDMI, PCIe and only USB HS. */
+&hdmi_blk_ctrl {
+ status = "disabled";
+};
+
+&hdmi_pvi {
+ status = "disabled";
+};
+
+&hdmi_tx {
+ status = "disabled";
+};
+
+&hdmi_tx_phy {
+ status = "disabled";
+};
+
+&i2c3 {
+ /* Resistive touch controller not populated on this one SoM variant. */
+ touchscreen@49 {
+ status = "disabled";
+ };
+};
+
+&irqsteer_hdmi {
+ status = "disabled";
+};
+
+&lcdif3 {
+ status = "disabled";
+};
+
+&pcie_phy {
+ status = "disabled";
+};
+
+&pcie {
+ status = "disabled";
+};
+
+/* Console UART */
+&pinctrl_uart1 {
+ fsl,pins = <
+ /* No pull-ups on DRC02, enable in-SoC pull-ups */
+ MX8MP_IOMUXC_SAI2_RXC__UART1_DCE_RX 0x149
+ MX8MP_IOMUXC_SAI2_RXFS__UART1_DCE_TX 0x149
+ >;
+};
+
+&pinctrl_uart3 {
+ fsl,pins = <
+ /* No pull-ups on DRC02, enable in-SoC pull-ups */
+ MX8MP_IOMUXC_ECSPI1_SCLK__UART3_DCE_RX 0x149
+ MX8MP_IOMUXC_ECSPI1_MOSI__UART3_DCE_TX 0x149
+ >;
+};
+
+&uart1 {
+ /*
+ * Due to the use of CAN2 the signals for CAN2 Tx and Rx are routed to
+ * DHCOM UART1 RTS/CTS pins. Therefore this UART have to use DHCOM GPIOs
+ * for RTS/CTS. So configure DHCOM GPIO I as RTS and GPIO M as CTS.
+ */
+ /delete-property/ uart-has-rtscts;
+ cts-gpios = <&gpio5 5 GPIO_ACTIVE_HIGH>; /* GPIO M */
+ pinctrl-0 = <&pinctrl_uart1 &pinctrl_dhcom_i &pinctrl_dhcom_m>;
+ pinctrl-names = "default";
+ rts-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>; /* GPIO I */
+};
+
+&uart3 {
+ /*
+ * On DRC02 this UART is used as RS485 interface and RS485_TX_En is
+ * controlled by DHCOM GPIO P. So remove RTS/CTS pins and the property
+ * uart-has-rtscts from this UART and add the DHCOM GPIO P pin via
+ * rts-gpios. The RS485_RX_En is controlled by DHCOM GPIO Q, see gpio1
+ * node above.
+ */
+ /delete-property/ uart-has-rtscts;
+ linux,rs485-enabled-at-boot-time;
+ pinctrl-0 = <&pinctrl_uart3 &pinctrl_dhcom_p &pinctrl_dhcom_q>;
+ pinctrl-names = "default";
+ rts-gpios = <&gpio2 10 GPIO_ACTIVE_HIGH>; /* GPIO P */
+};
+
+/* No WiFi/BT chipset on this SoM variant. */
+&uart2 {
+ bluetooth {
+ status = "disabled";
+ };
+};
+
+/* USB_OTG port is not routed out on DRC02. */
+&usb3_0 {
+ status = "disabled";
+};
+
+&usb_dwc3_0 {
+ status = "disabled";
+};
+
+/* USB_HOST port has USB Hub connected to it, PWR/OC pins are unused */
+&usb3_1 {
+ fsl,disable-port-power-control;
+ fsl,permanently-attached;
+};
+
+&usb_dwc3_1 {
+ dr_mode = "host";
+ maximum-speed = "high-speed";
+};
+
+/* No WiFi/BT chipset on this SoM variant. */
+&usdhc1 {
+ status = "disabled";
+};
+
+&iomuxc {
+ /*
+ * GPIO I is connected to UART1_RTS
+ * GPIO M is connected to UART1_CTS
+ * GPIO P is connected to RS485_TX_En
+ * GPIO Q is connected to RS485_RX_En
+ */
+ pinctrl-0 = <&pinctrl_hog_base
+ &pinctrl_dhcom_a &pinctrl_dhcom_b &pinctrl_dhcom_c
+ &pinctrl_dhcom_d &pinctrl_dhcom_e &pinctrl_dhcom_f
+ &pinctrl_dhcom_g &pinctrl_dhcom_h &pinctrl_dhcom_j
+ &pinctrl_dhcom_k &pinctrl_dhcom_l &pinctrl_dhcom_n
+ &pinctrl_dhcom_o &pinctrl_dhcom_r &pinctrl_dhcom_s
+ &pinctrl_dhcom_int>;
+};
projects / linux-block.git / commitdiff