[PATCH v4 2/3] arm64: dts: ti: Add support for Variscite VAR-SOM-AM62P
Stefano Radaelli
stefano.radaelli21 at gmail.com
Fri Jul 11 07:04:57 PDT 2025
Add device tree support for the Variscite VAR-SOM-AM62P system on module.
This SOM is designed to be used with various carrier boards.
The module includes:
- AM62P Sitara MPU processor
- Up to 8GB of DDR4-3733 memory
- eMMC storage memory
- PS6522430 chip as a Power Management Integrated circuit (PMIC)
- Integrated 10/100/1000 Mbps Ethernet Transceiver Analog Devices ADIN1300
- Resistive touch panel interface controller TI TSC2046
- I2C interfaces
Only SOM-specific peripherals are enabled by default. Carrier board
specific interfaces are left disabled to be enabled in the respective
carrier board device trees.
Link: https://www.variscite.it/product/system-on-module-som/cortex-a53-krait/var-som-am62p-ti-sitara-am62px/
Signed-off-by: Stefano Radaelli <stefano.radaelli21 at gmail.com>
---
v4:
- Moved every MCUs-related node into the SOM dtsi
- Removed unused audio node
v3:
- Change compatible string to match existing mainline format
- Lower case hex digits
- Generic node names
v2:
- Fixed warnings and cleanup
arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi | 408 ++++++++++++++++++
1 file changed, 408 insertions(+)
create mode 100644 arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
new file mode 100644
index 000000000000..9c8046111701
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62p5-var-som.dtsi
@@ -0,0 +1,408 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common dtsi for Variscite VAR-SOM-AM62P
+ *
+ * Copyright (C) 2025 Variscite Ltd. - https://www.variscite.com/
+ *
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/pwm/pwm.h>
+#include "k3-am62p5.dtsi"
+
+/ {
+ compatible = "variscite,var-som-am62p", "ti,am62p5";
+
+ wifi_pwrseq: wifi-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ post-power-on-delay-ms = <100>;
+ power-off-delay-us = <10000>;
+ reset-gpios = <&main_gpio0 54 GPIO_ACTIVE_LOW>, /* WIFI_PWR_EN */
+ <&main_gpio0 59 GPIO_ACTIVE_LOW>; /* WIFI_EN */
+ };
+
+ mmc_pwrseq: mmc-pwrseq {
+ compatible = "mmc-pwrseq-emmc";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc_pwrseq>;
+ reset-gpios = <&main_gpio0 49 GPIO_ACTIVE_LOW>;
+ };
+
+ memory at 80000000 {
+ /* 8G RAM */
+ reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
+ <0x00000008 0x80000000 0x00000001 0x80000000>;
+ device_type = "memory";
+ bootph-pre-ram;
+ };
+
+ opp-table {
+ /* Add 1.4GHz OPP for am62p5-sk board. Requires VDD_CORE at 0v85 */
+ opp-1400000000 {
+ opp-hz = /bits/ 64 <1400000000>;
+ opp-supported-hw = <0x01 0x0004>;
+ clock-latency-ns = <6000000>;
+ };
+ };
+
+ reserved_memory: reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ rtos_ipc_memory_region: rtos-ipc-memory at 9b500000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b500000 0x00 0x00300000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_dma_memory_region: mcu-r5fss-dma-memory-region at 9b800000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b800000 0x00 0x00100000>;
+ no-map;
+ };
+
+ mcu_r5fss0_core0_memory_region: mcu-r5fss-memory-region at 9b900000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b900000 0x00 0x00f00000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_dma_memory_region: r5f-dma-memory at 9c800000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9c800000 0x00 0x00100000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_memory_region: r5f-memory at 9c900000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9c900000 0x00 0x01e00000>;
+ no-map;
+ };
+
+ secure_tfa_ddr: tfa at 9e780000 {
+ reg = <0x00 0x9e780000 0x00 0x80000>;
+ no-map;
+ };
+
+ secure_ddr: optee at 9e800000 {
+ reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
+ no-map;
+ };
+ };
+
+ reg_3v3: regulator-3v3 {
+ compatible = "regulator-fixed";
+ regulator-name = "On-module +V3.3";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ reg_1v8: regulator-1v8 {
+ compatible = "regulator-fixed";
+ regulator-name = "On-module +V1.8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ vin-supply = <®_3v3>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ reg_3v3_phy: regulator-3v3-phy {
+ compatible = "regulator-fixed";
+ regulator-name = "On-module +V3.3_PHY";
+ gpios = <&main_gpio0 45 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ regulator-always-on;
+ status="okay";
+ };
+};
+
+&cpsw3g {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_rgmii1>;
+};
+
+&cpsw3g_mdio {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mdio1>;
+ cpsw3g_phy0: ethernet-phy at 4 {
+ reg = <4>;
+ compatible = "ethernet-phy-id0283.bc30";
+ reset-gpios = <&main_gpio0 46 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <100000>;
+ };
+};
+
+&cpsw_port1 {
+ /*
+ * The required RGMII TX and RX 2ns delays are implemented directly
+ * in hardware via passive delay elements on the SOM PCB.
+ * No delay configuration is needed in software via PHY driver.
+ */
+ phy-mode = "rgmii";
+ phy-handle = <&cpsw3g_phy0>;
+ status = "okay";
+};
+
+&main_i2c2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c2>;
+ clock-frequency = <400000>;
+ status = "okay";
+};
+
+&main_i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c3>;
+ clock-frequency = <400000>;
+ status = "okay";
+};
+
+&main_pmx0 {
+ pinctrl_mmc_pwrseq: main-emmc-pwrseq-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00c8, PIN_OUTPUT, 7) /* (AB23) VOUT0_DATA4.GPIO0_49 */
+ >;
+ };
+
+ pinctrl_i2c2: main-i2c2-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00b0, PIN_INPUT_PULLUP, 1) /* (T22) GPMC0_CSn2.I2C2_SCL */
+ AM62PX_IOPAD(0x00b4, PIN_INPUT_PULLUP, 1) /* (U25) GPMC0_CSn3.I2C2_SDA */
+ >;
+ };
+
+ pinctrl_i2c3: main-i2c3-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x01d0, PIN_INPUT_PULLUP, 2) /* (A23) UART0_CTSn.I2C3_SCL */
+ AM62PX_IOPAD(0x01d4, PIN_INPUT_PULLUP, 2) /* (C22) UART0_RTSn.I2C3_SDA */
+ >;
+ };
+
+ pinctrl_mdio1: main-mdio1-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x0160, PIN_OUTPUT, 0) /* (F17) MDIO0_MDC */
+ AM62PX_IOPAD(0x015c, PIN_INPUT, 0) /* (F16) MDIO0_MDIO */
+ >;
+ };
+
+ pinctrl_mmc2: main-mmc2-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x0120, PIN_INPUT_PULLUP, 0) /* (K24) MMC2_CMD */
+ AM62PX_IOPAD(0x0118, PIN_INPUT_PULLDOWN, 0) /* (K21) MMC2_CLK */
+ AM62PX_IOPAD(0x011c, PIN_INPUT_PULLUP, 0) /* () MMC2_CLKLB */
+ AM62PX_IOPAD(0x0114, PIN_INPUT_PULLUP, 0) /* (K23) MMC2_DAT0 */
+ AM62PX_IOPAD(0x0110, PIN_INPUT_PULLUP, 0) /* (K22) MMC2_DAT1 */
+ AM62PX_IOPAD(0x010c, PIN_INPUT_PULLUP, 0) /* (L20) MMC2_DAT2 */
+ AM62PX_IOPAD(0x0108, PIN_INPUT_PULLUP, 0) /* (L21) MMC2_DAT3 */
+ >;
+ };
+
+ pinctrl_rgmii1: main-rgmii1-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x014c, PIN_INPUT, 0) /* (B15) RGMII1_RD0 */
+ AM62PX_IOPAD(0x0150, PIN_INPUT, 0) /* (B16) RGMII1_RD1 */
+ AM62PX_IOPAD(0x0154, PIN_INPUT, 0) /* (A14) RGMII1_RD2 */
+ AM62PX_IOPAD(0x0158, PIN_INPUT, 0) /* (B14) RGMII1_RD3 */
+ AM62PX_IOPAD(0x0148, PIN_INPUT, 0) /* (A16) RGMII1_RXC */
+ AM62PX_IOPAD(0x0144, PIN_INPUT, 0) /* (A15) RGMII1_RX_CTL */
+ AM62PX_IOPAD(0x0134, PIN_INPUT, 0) /* (A18) RGMII1_TD0 */
+ AM62PX_IOPAD(0x0138, PIN_INPUT, 0) /* (C17) RGMII1_TD1 */
+ AM62PX_IOPAD(0x013c, PIN_INPUT, 0) /* (A17) RGMII1_TD2 */
+ AM62PX_IOPAD(0x0140, PIN_INPUT, 0) /* (C16) RGMII1_TD3 */
+ AM62PX_IOPAD(0x0130, PIN_INPUT, 0) /* (B17) RGMII1_TXC */
+ AM62PX_IOPAD(0x012c, PIN_INPUT, 0) /* (B18) RGMII1_TX_CTL */
+ >;
+ bootph-all;
+ };
+
+ pinctrl_spi0: main-spi0-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x01bc, PIN_OUTPUT, 0) /* (B21) SPI0_CLK */
+ AM62PX_IOPAD(0x01b4, PIN_OUTPUT, 0) /* (D20) SPI0_CS0 */
+ AM62PX_IOPAD(0x01c0, PIN_OUTPUT, 0) /* (B20) SPI0_D0 */
+ AM62PX_IOPAD(0x01c4, PIN_INPUT, 0) /* (C21) SPI0_D1 */
+ >;
+ };
+
+ pinctrl_uart5: main-uart5-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00ec, PIN_INPUT, 4) /* (AC21) VOUT0_DATA13.UART5_CTSn */
+ AM62PX_IOPAD(0x00e8, PIN_OUTPUT, 4) /* (AD21) VOUT0_DATA12.UART5_RTSn */
+ AM62PX_IOPAD(0x00d0, PIN_INPUT, 4) /* (AC23) VOUT0_DATA6.UART5_RXD */
+ AM62PX_IOPAD(0x00d4, PIN_OUTPUT, 4) /* (AE23) VOUT0_DATA7.UART5_TXD */
+ >;
+ };
+
+ pinctrl_bt: main-btgrp-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00f4, PIN_OUTPUT, 7) /* (Y20) VOUT0_DATA15.GPIO0_60 (BT_EN) */
+ >;
+ };
+
+ pinctrl_restouch: main-restouch-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00c4, PIN_INPUT_PULLUP, 7) /* (Y23) VOUT0_DATA3.GPIO0_48 */
+ >;
+ };
+
+ pinctrl_wifi: main-wifi-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x00dc, PIN_OUTPUT, 7) /* (AC22) VOUT0_DATA9.GPIO0_54 - WIFI_PWR_EN - */
+ AM62PX_IOPAD(0x00f0, PIN_OUTPUT, 7) /* (AA20) VOUT0_DATA14.GPIO0_59 - WIFI_EN - */
+ >;
+ };
+};
+
+&mcu_pmx0 {
+ pinctrl_wkup_clkout0: wkup-clkout0-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_MCU_IOPAD(0x0084, PIN_OUTPUT, 0) /* (F13) WKUP_CLKOUT0 */
+ >;
+ };
+};
+
+&main_spi0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_spi0>;
+ ti,pindir-d0-out-d1-in;
+
+ touchscreen at 0 {
+ compatible = "ti,ads7846";
+ reg = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_restouch>;
+ interrupt-parent = <&main_gpio0>;
+ interrupts = <48 IRQ_TYPE_EDGE_FALLING>;
+ spi-max-frequency = <1500000>;
+ pendown-gpio = <&main_gpio0 48 GPIO_ACTIVE_LOW>;
+ ti,x-min = /bits/ 16 <125>;
+ ti,x-max = /bits/ 16 <4008>;
+ ti,y-min = /bits/ 16 <282>;
+ ti,y-max = /bits/ 16 <3864>;
+ ti,x-plate-ohms = /bits/ 16 <180>;
+ ti,pressure-max = /bits/ 16 <255>;
+ ti,debounce-max = /bits/ 16 <10>;
+ ti,debounce-tol = /bits/ 16 <3>;
+ ti,debounce-rep = /bits/ 16 <1>;
+ ti,settle-delay-usec = /bits/ 16 <150>;
+ ti,keep-vref-on;
+ wakeup-source;
+ };
+};
+
+&main_uart5 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart5>, <&pinctrl_bt>;
+ uart-has-rtscts;
+ status = "okay";
+
+ bluetooth {
+ compatible = "nxp,88w8987-bt";
+ };
+};
+
+&sdhci0 {
+ status = "okay";
+ ti,driver-strength-ohm = <50>;
+ mmc-pwrseq = <&mmc_pwrseq>;
+ disable-wp;
+ bootph-all;
+};
+
+&sdhci2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc2>, <&pinctrl_wifi>;
+ bus-width = <4>;
+ disable-wp;
+ non-removable;
+ keep-power-in-suspend;
+ mmc-pwrseq = <&wifi_pwrseq>;
+ ti,fails-without-test-cd;
+ status = "okay";
+};
+
+&usbss0 {
+ ti,vbus-divider;
+};
+
+&usbss1 {
+ ti,vbus-divider;
+};
+
+&mailbox0_cluster0 {
+ status = "okay";
+
+ mbox_r5_0: mbox-r5-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&mailbox0_cluster1 {
+ status = "okay";
+
+ mbox_mcu_r5_0: mbox-mcu-r5-0 {
+ ti,mbox-rx = <0 0 0>;
+ ti,mbox-tx = <1 0 0>;
+ };
+};
+
+&mcu_r5fss0 {
+ status = "okay";
+};
+
+&mcu_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster1 &mbox_mcu_r5_0>;
+ memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
+ <&mcu_r5fss0_core0_memory_region>;
+};
+
+&wkup_r5fss0 {
+ status = "okay";
+};
+
+&wkup_r5fss0_core0 {
+ mboxes = <&mailbox0_cluster0 &mbox_r5_0>;
+ memory-region = <&wkup_r5fss0_core0_dma_memory_region>,
+ <&wkup_r5fss0_core0_memory_region>;
+};
+
+/* mcu_gpio0 and mcu_gpio_intr are reserved for mcu firmware usage */
+&mcu_gpio0 {
+ status = "reserved";
+};
+
+&mcu_gpio_intr {
+ status = "reserved";
+};
+
+&wkup_rtc0 {
+ status = "disabled";
+};
+
+&wkup_rti0 {
+ /* WKUP RTI0 is used by DM firmware */
+ status = "reserved";
+};
+
+&wkup_uart0 {
+ /* WKUP UART0 is used by DM firmware */
+ status = "reserved";
+};
+
+&main_uart1 {
+ /* Main UART1 is used by TIFS firmware */
+ status = "reserved";
+};
--
2.43.0
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