* [PATCH v3 2/3] arm64: dts: ti: Add support for Variscite VAR-SOM-AM62
2026-07-10 17:43 [PATCH v3 0/3] Add support for Variscite VAR-SOM-AM62 and Symphony board Stefano Radaelli
2026-07-10 17:43 ` [PATCH v3 1/3] dt-bindings: arm: ti: Add bindings for Variscite VAR-SOM-AM62 Stefano Radaelli
@ 2026-07-10 17:43 ` Stefano Radaelli
2026-07-10 17:43 ` [PATCH v3 3/3] arm64: dts: ti: var-som-am62: Add support for Variscite Symphony Board Stefano Radaelli
2 siblings, 0 replies; 5+ messages in thread
From: Stefano Radaelli @ 2026-07-10 17:43 UTC (permalink / raw)
To: linux-kernel, devicetree, linux-arm-kernel
Cc: pierluigi.p, matthias.p, Stefano Radaelli, Nishanth Menon,
Vignesh Raghavendra, Tero Kristo, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Kees Cook, Tony Luck,
Guilherme G. Piccoli
From: Stefano Radaelli <stefano.r@variscite.com>
Add device tree support for the Variscite VAR-SOM-AM62 system on module.
This SOM is designed to be used with various carrier boards.
The module includes:
- AM62x Sitara MPU processor
- Up to 4GB of DDR4-3733 memory
- Up to 128GB eMMC storage memory
- Integrated 10/100/1000 Mbps Ethernet Transceiver Analog Devices
- Audio codec wm8904
- Resistive touch panel interface controller
- I2C, UART and SPI interfaces
- Bluetooth 5.2 + WiFi single or dual band
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://variscite.com/system-on-module-som/ti-sitara-am62x/var-som-am62/
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
v2->v3:
- Add audio_refclk1 clock
- Removed pinctrl_vdd_mmc2
v1->v2:
- Fix AM62X_MCU_IOPAD macro
- Fix OPP table comment
- Remove reg_vdd_mmc2 regulator
arch/arm64/boot/dts/ti/k3-am625-var-som.dtsi | 483 +++++++++++++++++++
1 file changed, 483 insertions(+)
create mode 100644 arch/arm64/boot/dts/ti/k3-am625-var-som.dtsi
diff --git a/arch/arm64/boot/dts/ti/k3-am625-var-som.dtsi b/arch/arm64/boot/dts/ti/k3-am625-var-som.dtsi
new file mode 100644
index 000000000000..c2daa56c35e1
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-var-som.dtsi
@@ -0,0 +1,483 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common dtsi for Variscite VAR-SOM-AM62
+ *
+ * Link: https://variscite.com/system-on-module-som/ti-sitara-am62x/var-som-am62/
+ *
+ * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com/
+ * Copyright (C) 2026 Stefano Radaelli <stefano.r@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-am625.dtsi"
+
+/ {
+ compatible = "variscite,var-som-am62", "ti,am625";
+
+ memory@80000000 {
+ /* 2G RAM */
+ reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
+ device_type = "memory";
+ bootph-pre-ram;
+ };
+
+ mmc_pwrseq: mmc-pwrseq {
+ compatible = "mmc-pwrseq-emmc";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc_pwrseq>;
+ reset-gpios = <&main_gpio0 49 GPIO_ACTIVE_LOW>;
+ };
+
+ opp-table {
+ /* Add 1.4GHz OPP. Requires VDD_CORE to be at 0.85V */
+ 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;
+
+ ramoops@9ca00000 {
+ compatible = "ramoops";
+ reg = <0x00 0x9ca00000 0x00 0x00100000>;
+ record-size = <0x8000>;
+ console-size = <0x8000>;
+ ftrace-size = <0x00>;
+ pmsg-size = <0x8000>;
+ };
+
+ /* global cma region */
+ linux,cma {
+ compatible = "shared-dma-pool";
+ reusable;
+ size = <0x00 0x8000000>;
+ linux,cma-default;
+ };
+
+ rtos_ipc_memory_region: rtos-ipc-memory@9b500000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9b500000 0x00 0x00300000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_dma_memory_region: memory@9da00000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9da00000 0x00 0x100000>;
+ no-map;
+ };
+
+ wkup_r5fss0_core0_memory_region: memory@9db00000 {
+ compatible = "shared-dma-pool";
+ reg = <0x00 0x9db00000 0x00 0xc00000>;
+ no-map;
+ };
+
+ secure_tfa_ddr: tfa@9e780000 {
+ reg = <0x00 0x9e780000 0x00 0x80000>;
+ alignment = <0x1000>;
+ no-map;
+ };
+
+ secure_ddr: optee@9e800000 {
+ reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
+ alignment = <0x1000>;
+ no-map;
+ };
+ };
+
+ 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: 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_3v3_phy: regulator-3v3-phy {
+ compatible = "regulator-fixed";
+ regulator-name = "On-module +V3.3_PHY";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_eth_phy>;
+ gpios = <&main_gpio0 45 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ regulator-always-on;
+ };
+
+ sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,bitclock-master = <&codec_dai>;
+ simple-audio-card,format = "dsp_b";
+ simple-audio-card,frame-master = <&codec_dai>;
+ simple-audio-card,name = "wm8904-audio";
+ simple-audio-card,mclk-fs = <256>;
+ simple-audio-card,routing =
+ "Headphone Jack", "HPOUTL",
+ "Headphone Jack", "HPOUTR",
+ "IN2L", "Line In Jack",
+ "IN2R", "Line In Jack",
+ "IN1L", "Microphone Jack",
+ "IN1R", "Microphone Jack";
+ simple-audio-card,widgets =
+ "Microphone", "Microphone Jack",
+ "Headphone", "Headphone Jack",
+ "Line", "Line In Jack";
+
+ codec_dai: simple-audio-card,codec {
+ sound-dai = <&wm8904>;
+ };
+
+ simple-audio-card,cpu {
+ sound-dai = <&mcasp1>;
+ };
+ };
+};
+
+&audio_refclk1 {
+ assigned-clock-rates = <12000000>;
+};
+
+&cpsw3g {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_rgmii1>;
+ status = "okay";
+};
+
+&cpsw3g_mdio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mdio1>;
+ status = "okay";
+
+ cpsw3g_phy0: ethernet-phy@4 {
+ compatible = "ethernet-phy-id0283.bc30";
+ reg = <4>;
+ bootph-all;
+ reset-gpios = <&main_gpio0 46 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <20000>;
+ };
+};
+
+&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";
+
+ wm8904: audio-codec@1a {
+ compatible = "wlf,wm8904";
+ reg = <0x1a>;
+ #sound-dai-cells = <0>;
+ clocks = <&audio_refclk1>;
+ clock-names = "mclk";
+ AVDD-supply = <®_1v8>;
+ CPVDD-supply = <®_1v8>;
+ DBVDD-supply = <®_3v3>;
+ DCVDD-supply = <®_1v8>;
+ MICVDD-supply = <®_1v8>;
+ wlf,drc-cfg-names = "default", "peaklimiter", "tradition",
+ "soft", "music";
+ /*
+ * Config registers per name, respectively:
+ * KNEE_IP = 0, KNEE_OP = 0, HI_COMP = 1, LO_COMP = 1
+ * KNEE_IP = -24, KNEE_OP = -6, HI_COMP = 1/4, LO_COMP = 1
+ * KNEE_IP = -42, KNEE_OP = -3, HI_COMP = 0, LO_COMP = 1
+ * KNEE_IP = -45, KNEE_OP = -9, HI_COMP = 1/8, LO_COMP = 1
+ * KNEE_IP = -30, KNEE_OP = -10.5, HI_COMP = 1/4, LO_COMP = 1
+ */
+ wlf,drc-cfg-regs = /bits/ 16 <0x01af 0x3248 0x0000 0x0000>,
+ /bits/ 16 <0x04af 0x324b 0x0010 0x0408>,
+ /bits/ 16 <0x04af 0x324b 0x0028 0x0704>,
+ /bits/ 16 <0x04af 0x324b 0x0018 0x078c>,
+ /bits/ 16 <0x04af 0x324b 0x0010 0x050e>;
+ /* GPIO1 = DMIC_CLK, don't touch others */
+ wlf,gpio-cfg = <0x0018>, <0xffff>, <0xffff>, <0xffff>;
+ };
+};
+
+&main_i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c3>;
+ clock-frequency = <400000>;
+ status = "okay";
+};
+
+&main_pmx0 {
+ pinctrl_i2c2: main-i2c2-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0b0, PIN_INPUT_PULLUP, 1) /* (K22) GPMC0_CSn2.I2C2_SCL */
+ AM62X_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPMC0_CSn3.I2C2_SDA */
+ >;
+ };
+
+ pinctrl_i2c3: main-i2c3-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01d0, PIN_INPUT, 2) /* (A15) UART0_CTSn.I2C3_SCL */
+ AM62X_IOPAD(0x01d4, PIN_INPUT, 2) /* (B15) UART0_RTSn.I2C3_SDA */
+ >;
+ };
+
+ pinctrl_mcasp1: main-mcasp1-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0090, PIN_INPUT, 2) /* (M24) GPMC0_BE0N_CLE.MCASP1_ACLKX */
+ AM62X_IOPAD(0x0098, PIN_INPUT, 2) /* (U23) GPMC0_WAIT0.MCASP1_AFSX */
+ AM62X_IOPAD(0x008c, PIN_OUTPUT, 2) /* (L25) GPMC0_WEN.MCASP1_AXR0 */
+ AM62X_IOPAD(0x0084, PIN_INPUT, 2) /* (L23) GPMC0_ADVN_ALE.MCASP1_AXR2 */
+ AM62X_IOPAD(0x00a0, PIN_OUTPUT, 1) /* (K25) GPMC0_WPn.AUDIO_EXT_REFCLK1 */
+ >;
+ };
+
+ pinctrl_mdio1: main-mdio1-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x160, PIN_INPUT, 0) /* (AD24) MDIO0_MDC */
+ AM62X_IOPAD(0x15c, PIN_INPUT, 0) /* (AB22) MDIO0_MDIO */
+ >;
+ };
+
+ pinctrl_mmc_pwrseq: pinmux-mmc-pwrseq-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x00c8, PIN_OUTPUT, 7) /* (Y25) VOUT0_DATA4.GPIO0_49 */
+ >;
+ };
+
+ pinctrl_mmc0: main-mmc0-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
+ AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
+ AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
+ AM62X_IOPAD(0x210, PIN_INPUT, 0) /* (AA1) MMC0_DAT1 */
+ AM62X_IOPAD(0x20c, PIN_INPUT, 0) /* (AA3) MMC0_DAT2 */
+ AM62X_IOPAD(0x208, PIN_INPUT, 0) /* (Y4) MMC0_DAT3 */
+ AM62X_IOPAD(0x204, PIN_INPUT, 0) /* (AB2) MMC0_DAT4 */
+ AM62X_IOPAD(0x200, PIN_INPUT, 0) /* (AC1) MMC0_DAT5 */
+ AM62X_IOPAD(0x1fc, PIN_INPUT, 0) /* (AD2) MMC0_DAT6 */
+ AM62X_IOPAD(0x1f8, PIN_INPUT, 0) /* (AC2) MMC0_DAT7 */
+ >;
+ };
+
+ pinctrl_mmc2: main-mmc2-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x120, PIN_INPUT_PULLUP, 0) /* (C24) MMC2_CMD */
+ AM62X_IOPAD(0x118, PIN_INPUT_PULLDOWN, 0) /* (D25) MMC2_CLK */
+ AM62X_IOPAD(0x114, PIN_INPUT_PULLUP, 0) /* (B24) MMC2_DAT0 */
+ AM62X_IOPAD(0x110, PIN_INPUT_PULLUP, 0) /* (C25) MMC2_DAT1 */
+ AM62X_IOPAD(0x10c, PIN_INPUT_PULLUP, 0) /* (E23) MMC2_DAT2 */
+ AM62X_IOPAD(0x108, PIN_INPUT_PULLUP, 0) /* (D24) MMC2_DAT3 */
+ AM62X_IOPAD(0x11c, PIN_INPUT_PULLUP, 0) /* (#N/A) MMC2_CLKB */
+ >;
+ };
+
+ pinctrl_restouch: main-restouch-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x00c4, PIN_INPUT_PULLUP, 7) /* (W24) VOUT0_DATA3.GPIO0_48 */
+ >;
+ };
+
+ pinctrl_rgmii1: main-rgmii1-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x14c, PIN_INPUT, 0) /* (AB17) RGMII1_RD0 */
+ AM62X_IOPAD(0x150, PIN_INPUT, 0) /* (AC17) RGMII1_RD1 */
+ AM62X_IOPAD(0x154, PIN_INPUT, 0) /* (AB16) RGMII1_RD2 */
+ AM62X_IOPAD(0x158, PIN_INPUT, 0) /* (AA15) RGMII1_RD3 */
+ AM62X_IOPAD(0x148, PIN_INPUT, 0) /* (AD17) RGMII1_RXC */
+ AM62X_IOPAD(0x144, PIN_INPUT, 0) /* (AE17) RGMII1_RX_CTL */
+ AM62X_IOPAD(0x134, PIN_INPUT, 0) /* (AE20) RGMII1_TD0 */
+ AM62X_IOPAD(0x138, PIN_INPUT, 0) /* (AD20) RGMII1_TD1 */
+ AM62X_IOPAD(0x13c, PIN_INPUT, 0) /* (AE18) RGMII1_TD2 */
+ AM62X_IOPAD(0x140, PIN_INPUT, 0) /* (AD18) RGMII1_TD3 */
+ AM62X_IOPAD(0x130, PIN_INPUT, 0) /* (AE19) RGMII1_TXC */
+ AM62X_IOPAD(0x12c, PIN_INPUT, 0) /* (AD19) RGMII1_TX_CTL */
+ AM62X_IOPAD(0x00bc, PIN_INPUT, 7) /* (V24) VOUT0_DATA1.GPIO0_46 */
+ >;
+ };
+
+ pinctrl_eth_phy: main-eth-phy-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x00b8, PIN_INPUT, 7) /* (U22) VOUT0_DATA0.GPIO0_45 */
+ >;
+ };
+
+ pinctrl_spi0: main-spi0-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01bc, PIN_OUTPUT, 0) /* (A14) SPI0_CLK */
+ AM62X_IOPAD(0x01b4, PIN_OUTPUT, 0) /* (A13) SPI0_CS0 */
+ AM62X_IOPAD(0x01c0, PIN_OUTPUT, 0) /* (B13) SPI0_D0 */
+ AM62X_IOPAD(0x01c4, PIN_INPUT, 0) /* (B14) SPI0_D1 */
+ >;
+ };
+
+ pinctrl_uart5: main-uart5-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x00ec, PIN_INPUT, 4) /* (AA24) VOUT0_DATA13.UART5_CTSn */
+ AM62X_IOPAD(0x00e8, PIN_OUTPUT, 4) /* (AB25) VOUT0_DATA12.UART5_RTSn */
+ AM62X_IOPAD(0x00d0, PIN_INPUT, 4) /* (Y23) VOUT0_DATA6.UART5_RXD */
+ AM62X_IOPAD(0x00d4, PIN_OUTPUT, 4) /* (AA25) VOUT0_DATA7.UART5_TXD */
+ >;
+ };
+};
+
+&mcu_pmx0 {
+ pinctrl_wkup_clkout0: wkup-clkout0-default-pins {
+ pinctrl-single,pins = <
+ AM62X_MCU_IOPAD(0x0084, PIN_OUTPUT, 0) /* (F13) WKUP_CLKOUT0 */
+ >;
+ };
+};
+
+&main_spi0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_spi0>;
+ ti,pindir-d0-out-d1-in;
+ status = "okay";
+
+ /* Resistive touch controller */
+ ads7846: touchscreen@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;
+ };
+};
+
+/* On-module Bluetooth */
+&main_uart5 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart5>;
+ uart-has-rtscts;
+ status = "okay";
+};
+
+&mcasp1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mcasp1>;
+ op-mode = <0>; /* MCASP_IIS_MODE */
+ serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
+ 1 0 2 0
+ 0 0 0 0
+ 0 0 0 0
+ 0 0 0 0
+ >;
+ tdm-slots = <2>;
+ #sound-dai-cells = <0>;
+ status = "okay";
+};
+
+/* On-module eMMC */
+&sdhci0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc0>;
+ bootph-all;
+ disable-wp;
+ mmc-pwrseq = <&mmc_pwrseq>;
+ non-removable;
+ status="okay";
+};
+
+/* On-module Wi-Fi */
+&sdhci2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc2>, <&pinctrl_wkup_clkout0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ assigned-clocks = <&k3_clks 157 158>; /* wkup_clkout_sel_out0 */
+ assigned-clock-parents = <&k3_clks 157 164>; /* clk_32k_rc_sel_out0 */
+ bus-width = <4>;
+ disable-wp;
+ non-removable;
+ cap-power-off-card;
+ status = "okay";
+
+ brcmf: wifi@1 {
+ compatible = "brcm,bcm4329-fmac";
+ reg = <1>;
+ };
+};
+
+&usbss0 {
+ ti,vbus-divider;
+};
+
+&usbss1 {
+ ti,vbus-divider;
+};
+
+/* 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";
+};
+
+#include "k3-am62-ti-ipc-firmware.dtsi"
--
2.47.3
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v3 3/3] arm64: dts: ti: var-som-am62: Add support for Variscite Symphony Board
2026-07-10 17:43 [PATCH v3 0/3] Add support for Variscite VAR-SOM-AM62 and Symphony board Stefano Radaelli
2026-07-10 17:43 ` [PATCH v3 1/3] dt-bindings: arm: ti: Add bindings for Variscite VAR-SOM-AM62 Stefano Radaelli
2026-07-10 17:43 ` [PATCH v3 2/3] arm64: dts: ti: Add support " Stefano Radaelli
@ 2026-07-10 17:43 ` Stefano Radaelli
2 siblings, 0 replies; 5+ messages in thread
From: Stefano Radaelli @ 2026-07-10 17:43 UTC (permalink / raw)
To: linux-kernel, devicetree, linux-arm-kernel
Cc: pierluigi.p, matthias.p, Stefano Radaelli, Nishanth Menon,
Vignesh Raghavendra, Tero Kristo, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Kees Cook, Tony Luck,
Guilherme G. Piccoli
From: Stefano Radaelli <stefano.r@variscite.com>
Add device tree support for the Variscite Symphony carrier board with
the VAR-SOM-AM62 system on module.
The Symphony board includes
- uSD Card support
- USB ports and OTG
- Additional Gigabit Ethernet interface
- Uart interfaces
- OV5640 Camera support
- GPIO Expander and TPM
- CAN, I2C and general purpose interfaces
- Capacitive touch controller
Link: https://www.variscite.it/product/single-board-computers/symphony-board/
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
v2->v3:
- Fix reg_sdhc1_vmmc regulator
- Add missing properties on pca9534 node
v1->v2:
- Fix reg_sdhc1_vmmc pinctrl
- Add reg_ov5640_buf_en pinctrl
arch/arm64/boot/dts/ti/Makefile | 1 +
.../boot/dts/ti/k3-am625-var-som-symphony.dts | 555 ++++++++++++++++++
2 files changed, 556 insertions(+)
create mode 100644 arch/arm64/boot/dts/ti/k3-am625-var-som-symphony.dts
diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 371f9a043fe5..e33c4d0363a9 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -29,6 +29,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay-csi2-tevi-ov5640.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am625-phyboard-lyra-rdk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am625-tqma62xx-mba62xx.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-var-som-symphony.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dev-mezzanine-can.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dev-mezzanine-panel-cap-touch-10inch-lvds.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dev-nau8822-btl.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-am625-var-som-symphony.dts b/arch/arm64/boot/dts/ti/k3-am625-var-som-symphony.dts
new file mode 100644
index 000000000000..e2fba95d9b94
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-var-som-symphony.dts
@@ -0,0 +1,555 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Variscite Symphony carrier board for VAR-SOM-AM62
+ *
+ * Link: https://www.variscite.it/product/single-board-computers/symphony-board/
+ *
+ * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com/
+ * Copyright (C) 2026 Stefano Radaelli <stefano.r@variscite.com>
+ *
+ */
+
+/dts-v1/;
+
+#include "k3-am625-var-som.dtsi"
+
+/ {
+ model = "Variscite VAR-SOM-AM62 on Symphony-Board";
+ compatible = "variscite,var-som-am62-symphony", "variscite,var-som-am62", "ti,am625";
+
+ aliases {
+ ethernet0 = &cpsw_port1;
+ ethernet1 = &cpsw_port2;
+ mmc0 = &sdhci0;
+ mmc1 = &sdhci1;
+ mmc2 = &sdhci2;
+ serial0 = &main_uart0;
+ serial2 = &main_uart2;
+ serial5 = &main_uart5;
+ serial6 = &main_uart6;
+ spi5 = &main_spi2;
+ usb0 = &usb0;
+ usb1 = &usb1;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ clk_ov5640_fixed: clock-24000000 {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <24000000>;
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+
+ button-back {
+ label = "Back";
+ linux,code = <KEY_BACK>;
+ gpios = <&pca9534 1 GPIO_ACTIVE_LOW>;
+ };
+
+ button-home {
+ label = "Home";
+ linux,code = <KEY_HOME>;
+ gpios = <&pca9534 2 GPIO_ACTIVE_LOW>;
+ };
+
+ button-menu {
+ label = "Menu";
+ linux,code = <KEY_MENU>;
+ gpios = <&pca9534 3 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ gpio-leds {
+ compatible = "gpio-leds";
+
+ led-heartbeat {
+ label = "Heartbeat";
+ linux,default-trigger = "heartbeat";
+ gpios = <&pca9534 0 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ reg_2p8v: regulator-2p8v {
+ compatible = "regulator-fixed";
+ regulator-name = "2P8V";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ vin-supply = <®_3v3>;
+ regulator-always-on;
+ };
+
+ reg_1p8v: regulator-1p8v {
+ compatible = "regulator-fixed";
+ regulator-name = "1P8V";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ vin-supply = <®_3v3>;
+ regulator-always-on;
+ };
+
+ reg_1p5v: regulator-1p5v {
+ compatible = "regulator-fixed";
+ regulator-name = "1P5V";
+ regulator-min-microvolt = <1500000>;
+ regulator-max-microvolt = <1500000>;
+ vin-supply = <®_3v3>;
+ regulator-always-on;
+ };
+
+ reg_sdhc1_vmmc: regulator-sdhc1 {
+ compatible = "regulator-fixed";
+ regulator-name = "+V3.3_SD";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_sd1_vmmc>;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ enable-active-high;
+ gpios = <&main_gpio0 30 GPIO_ACTIVE_HIGH>;
+ bootph-all;
+ };
+
+ reg_sdhc1_vqmmc: regulator-sdhci1-vqmmc {
+ compatible = "regulator-gpio";
+ regulator-name = "+V3.3_SD_VQMMC";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_sd1_vqmmc>;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ gpios = <&main_gpio0 56 GPIO_ACTIVE_HIGH>;
+ states = <1800000 0x0>,
+ <3300000 0x1>;
+ bootph-all;
+ };
+
+ reg_ov5640_buf_en: regulator-camera-buf-en {
+ compatible = "regulator-fixed";
+ regulator-name = "ov5640_buf_en";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_ov5640_buf>;
+ gpios = <&main_gpio0 21 GPIO_ACTIVE_HIGH>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ transceiver1: can-phy {
+ compatible = "ti,tcan1042";
+ #phy-cells = <0>;
+ max-bitrate = <5000000>;
+ };
+
+ connector {
+ compatible = "gpio-usb-b-connector", "usb-b-connector";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_extcon>;
+ label = "USB-C";
+ id-gpios = <&main_gpio1 12 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+
+ port {
+ usb_con_hs: endpoint {
+ remote-endpoint = <&typec_hs>;
+ };
+ };
+ };
+};
+
+&cdns_csi2rx0 {
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ csi0_port0: port@0 {
+ reg = <0>;
+ status = "okay";
+
+ csi2rx0_in_sensor: endpoint {
+ remote-endpoint = <&csi2_cam0>;
+ bus-type = <4>; /* CSI2 DPHY. */
+ clock-lanes = <0>;
+ data-lanes = <1 2>;
+ };
+ };
+ };
+};
+
+&cpsw3g {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_rgmii1>,
+ <&pinctrl_rgmii2>;
+ status = "okay";
+
+ cpts@3d000 {
+ /* MAP HW3_TS_PUSH to GENF1 */
+ ti,pps = <2 1>;
+ };
+};
+
+&cpsw3g_mdio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mdio1>;
+ status = "okay";
+
+ cpsw3g_phy1: ethernet-phy@5 {
+ compatible = "ethernet-phy-id0283.bc30";
+ reg = <5>;
+ reset-gpios = <&pca9534 5 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <100000>;
+ };
+};
+
+&cpsw_port2 {
+ /*
+ * The required RGMII TX and RX 2ns delays are implemented directly
+ * in hardware via passive delay elements on the Symphony PCB.
+ * No delay configuration is needed in software via PHY driver.
+ */
+ phy-mode = "rgmii";
+ phy-handle = <&cpsw3g_phy1>;
+ status = "okay";
+};
+
+&dphy0 {
+ status = "okay";
+};
+
+&epwm1 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_epwm1>;
+};
+
+&main_i2c0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c0>;
+ clock-frequency = <400000>;
+ status = "okay";
+
+ /* GPIO expander */
+ pca9534: gpio@20 {
+ compatible = "nxp,pca9534";
+ reg = <0x20>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pca9534>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&main_gpio1>;
+ interrupts = <30 IRQ_TYPE_EDGE_FALLING>;
+
+ usb3-sel-hog {
+ gpio-hog;
+ gpios = <4 0>;
+ output-low;
+ line-name = "usb3_sel";
+ };
+
+ eth-som-vselect-hog {
+ gpio-hog;
+ gpios = <6 0>;
+ output-low;
+ line-name = "eth-vselect";
+ };
+
+ eth-mdio-enable-hog {
+ gpio-hog;
+ gpios = <7 0>;
+ output-high;
+ line-name = "eth-mdio-enable";
+ };
+ };
+
+ ov5640: camera@3c {
+ compatible = "ovti,ov5640";
+ reg = <0x3c>;
+ clocks = <&clk_ov5640_fixed>;
+ clock-names = "xclk";
+ AVDD-supply = <®_2p8v>;
+ DOVDD-supply = <®_1p8v>;
+ DVDD-supply = <®_1p5v>;
+ powerdown-gpios = <&main_gpio0 10 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&main_gpio0 22 GPIO_ACTIVE_LOW>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_ov5640>;
+
+ port {
+ csi2_cam0: endpoint {
+ remote-endpoint = <&csi2rx0_in_sensor>;
+ clock-lanes = <0>;
+ data-lanes = <1 2>;
+ };
+ };
+ };
+};
+
+&main_i2c1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c1>;
+ clock-frequency = <400000>;
+ status = "okay";
+
+ pcal6408: gpio@21 {
+ compatible = "nxp,pcal6408";
+ reg = <0x21>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ /* RGB_SEL */
+ lvds-brg-enable-hog {
+ gpio-hog;
+ gpios = <7 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "lvds_brg_en";
+ };
+ };
+
+ st33ktpm2xi2c: tpm@2e {
+ compatible = "st,st33ktpm2xi2c", "tcg,tpm-tis-i2c";
+ label = "tpm";
+ reg = <0x2e>;
+ reset-gpios = <&pcal6408 4 GPIO_ACTIVE_LOW>;
+ };
+
+ /* Capacitive touch controller */
+ ft5x06_ts: touchscreen@38 {
+ compatible = "edt,edt-ft5206";
+ reg = <0x38>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_captouch_pins>;
+ interrupt-parent = <&main_gpio1>;
+ interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
+ touchscreen-size-x = <800>;
+ touchscreen-size-y = <480>;
+ touchscreen-inverted-x;
+ touchscreen-inverted-y;
+ wakeup-source;
+ };
+
+ rtc@68 {
+ compatible = "dallas,ds1337";
+ reg = <0x68>;
+ };
+};
+
+&main_mcan0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mcan0>;
+ phys = <&transceiver1>;
+ status = "okay";
+};
+
+&main_pmx0 {
+ pinctrl_captouch_pins: main-captouch-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01b8, PIN_INPUT, 7) /* (C13) SPI0_CS1.GPIO1_16 */
+ >;
+ };
+
+ pinctrl_epwm1: main-epwm1-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x019c, PIN_OUTPUT, 6) /* (B18) MCASP0_AXR1.EHRPWM1_A */
+ >;
+ };
+
+ pinctrl_extcon: main-extcon-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01a8, PIN_INPUT, 7) /* (D20) MCASP0_AFSX.GPIO1_12 */
+ >;
+ };
+
+ pinctrl_i2c0: main-i2c0-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x1e0, PIN_INPUT_PULLUP, 0) /* (B16) I2C0_SCL */
+ AM62X_IOPAD(0x1e4, PIN_INPUT_PULLUP, 0) /* (A16) I2C0_SDA */
+ >;
+ };
+
+ pinctrl_i2c1: main-i2c1-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x1e8, PIN_INPUT_PULLUP, 0) /* (B17) I2C1_SCL */
+ AM62X_IOPAD(0x1ec, PIN_INPUT_PULLUP, 0) /* (A17) I2C1_SDA */
+ >;
+ };
+
+ pinctrl_mcan0: main-mcan0-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x1dc, PIN_INPUT, 0) /* (E15) MCAN0_RX */
+ AM62X_IOPAD(0x1d8, PIN_OUTPUT, 0) /* (C15) MCAN0_TX */
+ >;
+ };
+
+ pinctrl_mmc1: main-mmc1-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x23c, PIN_INPUT, 0) /* (A21) MMC1_CMD */
+ AM62X_IOPAD(0x234, PIN_INPUT, 0) /* (B22) MMC1_CLK */
+ AM62X_IOPAD(0x230, PIN_INPUT, 0) /* (A22) MMC1_DAT0 */
+ AM62X_IOPAD(0x22c, PIN_INPUT, 0) /* (B21) MMC1_DAT1 */
+ AM62X_IOPAD(0x228, PIN_INPUT, 0) /* (C21) MMC1_DAT2 */
+ AM62X_IOPAD(0x224, PIN_INPUT, 0) /* (D22) MMC1_DAT3 */
+ AM62X_IOPAD(0x240, PIN_INPUT, 0) /* (D17) MMC1_SDCD */
+ >;
+ };
+
+ pinctrl_ov5640: main-ov5640-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0028, PIN_OUTPUT, 7) /* (J22) OSPI0_D7.GPIO0_10 */
+ AM62X_IOPAD(0x0058, PIN_OUTPUT, 7) /* (R23) GPMC0_AD7.GPIO0_22 */
+ >;
+ };
+
+ pinctrl_ov5640_buf: main-ov5640-buf-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0054, PIN_OUTPUT, 7) /* (P21) GPMC0_AD6.GPIO0_21 */
+ >;
+ };
+
+ pinctrl_pca9534: main-pca9534-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01f0, PIN_INPUT, 7) /* (A18) EXT_REFCLK1.GPIO1_30 */
+ >;
+ };
+
+ pinctrl_rgmii2: main-rgmii2-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x184, PIN_INPUT, 0) /* (AE23) RGMII2_RD0 */
+ AM62X_IOPAD(0x188, PIN_INPUT, 0) /* (AB20) RGMII2_RD1 */
+ AM62X_IOPAD(0x18c, PIN_INPUT, 0) /* (AC21) RGMII2_RD2 */
+ AM62X_IOPAD(0x190, PIN_INPUT, 0) /* (AE22) RGMII2_RD3 */
+ AM62X_IOPAD(0x180, PIN_INPUT, 0) /* (AD23) RGMII2_RXC */
+ AM62X_IOPAD(0x17c, PIN_INPUT, 0) /* (AD22) RGMII2_RX_CTL */
+ AM62X_IOPAD(0x16c, PIN_INPUT, 0) /* (Y18) RGMII2_TD0 */
+ AM62X_IOPAD(0x170, PIN_INPUT, 0) /* (AA18) RGMII2_TD1 */
+ AM62X_IOPAD(0x174, PIN_INPUT, 0) /* (AD21) RGMII2_TD2 */
+ AM62X_IOPAD(0x178, PIN_INPUT, 0) /* (AC20) RGMII2_TD3 */
+ AM62X_IOPAD(0x168, PIN_INPUT_PULLDOWN, 0) /* (AE21) RGMII2_TXC */
+ AM62X_IOPAD(0x164, PIN_INPUT, 0) /* (AA19) RGMII2_TX_CTL */
+ >;
+ };
+
+ pinctrl_sd1_vmmc: main-sd1-vmmc-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0078, PIN_OUTPUT, 7) /* (U24) GPMC0_AD15.GPIO0_30 */
+ >;
+ };
+
+ pinctrl_sd1_vqmmc: main-sd1-vqmmc-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x00e4, PIN_OUTPUT, 7) /* (AA23) VOUT0_DATA11.GPIO0_56 */
+ >;
+ };
+
+ pinctrl_spi2: main_spi2-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x01b0, PIN_INPUT, 1) /* (A20) MCASP0_ACLKR.SPI2_CLK */
+ AM62X_IOPAD(0x0194, PIN_OUTPUT, 1) /* (B19) MCASP0_AXR3.SPI2_D0 */
+ AM62X_IOPAD(0x0198, PIN_INPUT, 1) /* (A19) MCASP0_AXR2.SPI2_D1 */
+ AM62X_IOPAD(0x01ac, PIN_OUTPUT, 7) /* (E19) MCASP0_AFSR.GPIO1_13 */
+ >;
+ };
+
+ pinctrl_uart0: main-uart0-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x1c8, PIN_INPUT, 0) /* (D14) UART0_RXD, change muxmode from 0 to 7 to deactivate Debug UART RXD */
+ AM62X_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (E14) UART0_TXD */
+ >;
+ };
+
+ pinctrl_uart2: main-uart2-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x005c, PIN_INPUT_PULLUP, 2) /* (R24) GPMC0_AD8.UART2_RXD */
+ AM62X_IOPAD(0x0060, PIN_OUTPUT, 2) /* (R25) GPMC0_AD9.UART2_TXD */
+ >;
+ };
+
+ pinctrl_uart6: main-uart6-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x009c, PIN_INPUT, 3) /* (V25) GPMC0_WAIT1.UART6_RXD */
+ AM62X_IOPAD(0x0244, PIN_OUTPUT, 1) /* (C17) MMC1_SDWP.UART6_TXD */
+ >;
+ };
+
+ pinctrl_usb1: main-usb1-default-pins {
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x0258, PIN_OUTPUT, 0) /* (F18) USB1_DRVVBUS */
+ >;
+ };
+};
+
+&main_spi2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_spi2>;
+ ti,pindir-d0-out-d1-in;
+ cs-gpios = <&main_gpio1 13 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+};
+
+&main_uart0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart0>;
+ status = "okay";
+};
+
+&main_uart2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart2>;
+ status = "okay";
+};
+
+&main_uart6 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart6>;
+ status = "okay";
+};
+
+&sdhci1 {
+ /* SD Card */
+ vmmc-supply = <®_sdhc1_vmmc>;
+ vqmmc-supply = <®_sdhc1_vqmmc>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc1>;
+ disable-wp;
+ bootph-all;
+ status = "okay";
+};
+
+&ti_csi2rx0 {
+ status = "okay";
+};
+
+&usb0 {
+ usb-role-switch;
+ status = "okay";
+
+ port {
+ typec_hs: endpoint {
+ remote-endpoint = <&usb_con_hs>;
+ };
+ };
+};
+
+&usb1 {
+ dr_mode = "host";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb1>;
+ status = "okay";
+};
+
+&usbss0 {
+ status = "okay";
+};
+
+&usbss1 {
+ status = "okay";
+};
--
2.47.3
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