ARM: dts: imx6qdl: Add Variscite VAR-SOM-MX6 SoM support

This patch adds support for the Variscite VAR_SOM-MX6 SoM with :
- i.MX6 Quad or Dual Lite SoC
- 256 – 4096 MB DDR3
- 4-64 GB eMMC
- 128 – 1024 MB SLC NAND
- Camera Interface
- HDMI+CEC interface
- LVDS / DSI / Parallel RGB interfaces
- Ethernet RGMII interface
- On-SoM Wi-Fi/Bluetooth with WiLink wl183x SDIO Module
- SD/MMC/SDIO interface
- USB Host + USB OTG interface
- I2C interfaces
- SPI interfaces
- PCI-Express 2.0 interface
- on-SoM Audio Codec with HP/Line-In interfaces + DMIC interface
- Digital Audio interface
- S/PDIF interface

Product website : https://www.variscite.com/product/system-on-module-som/cortex-a9/var-som-mx6-cpu-freescale-imx6/

Support is handled with a SoM-centric dtsi exporting the default interfaces
along the default pinmuxing to be enabled by the board dts file.

This file is based on the one provided by Variscite on their own
kernel, but adapted for mainline.

Cc: Pierluigi Passaro <pierluigi.p@variscite.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-var-som.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-var-som.dtsi
new file mode 100644 (file)
index 0000000..a1ea33c
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-var-som.dtsi
@@ -0,0 +1,569 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Support for Variscite VAR-SOM-MX6 Module
+ *
+ * Copyright 2011 Linaro Ltd.
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ * Copyright (C) 2014-2016 Variscite, Ltd.
+ * Author: Donio Ron <ron.d@variscite.com>
+ * Copyright 2022 Bootlin
+ */
+
+/dts-v1/;
+
+#include "imx6q.dtsi"
+#include <dt-bindings/clock/imx6qdl-clock.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/sound/fsl-imx-audmux.h>
+
+/ {
+       model = "Variscite VAR-SOM-MX6 module";
+       compatible = "variscite,var-som-imx6q", "fsl,imx6q";
+
+       chosen {
+               stdout-path = &uart1;
+       };
+
+       memory@10000000 {
+               device_type = "memory";
+               reg = <0x10000000 0x40000000>;
+       };
+
+       reg_usb_otg_vbus: regulator-usb-otg-vbus {
+               compatible = "regulator-fixed";
+               regulator-name = "usb_otg_vbus";
+               regulator-min-microvolt = <5000000>;
+               regulator-max-microvolt = <5000000>;
+       };
+
+       reg_usb_h1_vbus: regulator-usb-h1-vbud {
+               compatible = "regulator-fixed";
+               regulator-name = "usb_h1_vbus";
+               regulator-min-microvolt = <5000000>;
+               regulator-max-microvolt = <5000000>;
+       };
+
+       reg_1p8v: regulator-1p8v {
+               compatible = "regulator-fixed";
+               regulator-name = "1P8V";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+               regulator-always-on;
+       };
+
+       reg_3p3v: regulator-3p3v {
+               compatible = "regulator-fixed";
+               regulator-name = "3P3V";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               regulator-always-on;
+       };
+
+       reg_wl18xx_vmmc: regulator-wl18xx {
+               compatible = "regulator-fixed";
+               regulator-name = "vwl1807";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+               gpio = <&gpio7 8 GPIO_ACTIVE_HIGH>;
+               enable-active-high;
+               startup-delay-us = <70000>;
+       };
+
+       sound: sound {
+               compatible = "simple-audio-card";
+               simple-audio-card,name = "var-som-audio";
+               simple-audio-card,format = "i2s";
+               simple-audio-card,bitclock-master = <&sound_codec>;
+               simple-audio-card,frame-master = <&sound_codec>;
+               simple-audio-card,widgets = "Headphone", "Headphone Jack",
+                                           "Line", "Line In", "Microphone", "Mic Jack";
+               simple-audio-card,routing = "Headphone Jack", "HPLOUT",
+                                           "Headphone Jack", "HPROUT",
+                                           "LINE1L", "Line In",
+                                           "LINE1R", "Line In";
+
+               sound_cpu: simple-audio-card,cpu {
+                       sound-dai = <&ssi2>;
+               };
+
+               sound_codec: simple-audio-card,codec {
+                       sound-dai = <&tlv320aic3106>;
+                       clocks = <&clks IMX6QDL_CLK_CKO>;
+               };
+       };
+
+       rfkill {
+               compatible = "rfkill-gpio";
+               name = "rfkill";
+               radio-type = "bluetooth";
+               shutdown-gpios = <&gpio6 18 GPIO_ACTIVE_HIGH>;
+       };
+};
+
+&audmux {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_audmux>;
+       status = "okay";
+
+       mux-ssi2 {
+               fsl,audmux-port = <1>;
+               fsl,port-config = <
+                       (IMX_AUDMUX_V2_PTCR_SYN |
+                       IMX_AUDMUX_V2_PTCR_TFSDIR |
+                       IMX_AUDMUX_V2_PTCR_TFSEL(2) |
+                       IMX_AUDMUX_V2_PTCR_TCLKDIR |
+                       IMX_AUDMUX_V2_PTCR_TCSEL(2))
+                       IMX_AUDMUX_V2_PDCR_RXDSEL(2)
+               >;
+       };
+
+       mux-aud3 {
+               fsl,audmux-port = <2>;
+               fsl,port-config = <
+                       IMX_AUDMUX_V2_PTCR_SYN
+                       IMX_AUDMUX_V2_PDCR_RXDSEL(1)
+               >;
+       };
+};
+
+&ecspi3 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_ecspi3>;
+       cs-gpios = <&gpio4 24 GPIO_ACTIVE_LOW>;
+       status = "okay";
+};
+
+&fec {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_enet>;
+       phy-mode = "rgmii";
+       phy-handle = <&rgmii_phy>;
+       status = "okay";
+
+       mdio {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               rgmii_phy: ethernet-phy@7 {
+                       reg = <7>;
+                       reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;
+                       reset-assert-us = <10000>;
+               };
+       };
+};
+
+&gpmi {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_gpmi_nand>;
+       status = "okay";
+};
+
+&i2c2 {
+       clock-frequency = <100000>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_i2c2>;
+       status = "okay";
+
+       pmic@8 {
+               compatible = "fsl,pfuze100";
+               reg = <0x08>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_pmic>;
+
+               regulators {
+                       sw1a_reg: sw1ab {
+                               regulator-min-microvolt = <300000>;
+                               regulator-max-microvolt = <1875000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                               regulator-ramp-delay = <6250>;
+                       };
+
+                       sw1c_reg: sw1c {
+                               regulator-min-microvolt = <300000>;
+                               regulator-max-microvolt = <1875000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                               regulator-ramp-delay = <6250>;
+                       };
+
+                       sw2_reg: sw2 {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3300000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+
+                       sw3a_reg: sw3a {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+
+                       sw3b_reg: sw3b {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+
+                       sw4_reg: sw4 {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <3950000>;
+                       };
+
+                       snvs_reg: vsnvs {
+                               regulator-min-microvolt = <1200000>;
+                               regulator-max-microvolt = <3000000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+
+                       vref_reg: vrefddr {
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+
+                       vgen1_reg: vgen1 {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <1550000>;
+                       };
+
+                       vgen2_reg: vgen2 {
+                               regulator-min-microvolt = <800000>;
+                               regulator-max-microvolt = <1550000>;
+                       };
+
+                       vgen3_reg: vgen3 {
+                               regulator-min-microvolt = <1800000>;
+                               regulator-max-microvolt = <3300000>;
+                               regulator-always-on;
+                               regulator-boot-on;
+                       };
+
+                       vgen4_reg: vgen4 {
+                               regulator-min-microvolt = <1800000>;
+                               regulator-max-microvolt = <3300000>;
+                               regulator-always-on;
+                               regulator-boot-on;
+                       };
+
+                       vgen5_reg: vgen5 {
+                               regulator-min-microvolt = <1800000>;
+                               regulator-max-microvolt = <3300000>;
+                               regulator-always-on;
+                               regulator-boot-on;
+                       };
+
+                       vgen6_reg: vgen6 {
+                               regulator-min-microvolt = <2800000>;
+                               regulator-max-microvolt = <2800000>;
+                               regulator-always-on;
+                               regulator-boot-on;
+                       };
+               };
+       };
+
+       tlv320aic3106: audio-codec@1b {
+               compatible = "ti,tlv320aic3106";
+               reg = <0x1b>;
+               #sound-dai-cells = <0>;
+               DRVDD-supply = <&reg_3p3v>;
+               AVDD-supply = <&reg_3p3v>;
+               IOVDD-supply = <&reg_3p3v>;
+               DVDD-supply = <&reg_1p8v>;
+               ai3x-ocmv = <0>;
+               reset-gpios = <&gpio4 5 GPIO_ACTIVE_LOW>;
+               ai3x-gpio-func = <
+                       0 /* AIC3X_GPIO1_FUNC_DISABLED */
+                       5 /* AIC3X_GPIO2_FUNC_DIGITAL_MIC_INPUT */
+               >;
+       };
+};
+
+&iomuxc {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_hog>;
+
+       pinctrl_audmux: audmuxgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_CSI0_DAT7__AUD3_RXD          0x130b0
+                       MX6QDL_PAD_CSI0_DAT4__AUD3_TXC          0x130b0
+                       MX6QDL_PAD_CSI0_DAT5__AUD3_TXD          0x110b0
+                       MX6QDL_PAD_CSI0_DAT6__AUD3_TXFS         0x130b0
+                       /* Audio Clock */
+                       MX6QDL_PAD_GPIO_0__CCM_CLKO1            0x130b0
+               >;
+       };
+
+       pinctrl_bt: btgrp {
+               fsl,pins = <
+                       /* Bluetooth/wifi enable */
+                       MX6QDL_PAD_SD3_DAT6__GPIO6_IO18         0x1b0b1
+                       /* Wifi Slow Clock */
+                       MX6QDL_PAD_ENET_RXD0__OSC32K_32K_OUT    0x000b0
+               >;
+       };
+
+       pinctrl_ecspi3: ecspi3grp {
+               fsl,pins = <
+                       MX6QDL_PAD_DISP0_DAT2__ECSPI3_MISO      0x100b1
+                       MX6QDL_PAD_DISP0_DAT1__ECSPI3_MOSI      0x100b1
+                       MX6QDL_PAD_DISP0_DAT0__ECSPI3_SCLK      0x100b1
+               >;
+       };
+
+       pinctrl_enet: enetgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_ENET_MDIO__ENET_MDIO         0x1b0b0
+                       MX6QDL_PAD_ENET_MDC__ENET_MDC           0x1b0b0
+                       MX6QDL_PAD_RGMII_TXC__RGMII_TXC         0x1b0b0
+                       MX6QDL_PAD_RGMII_TD0__RGMII_TD0         0x1b0b0
+                       MX6QDL_PAD_RGMII_TD1__RGMII_TD1         0x1b0b0
+                       MX6QDL_PAD_RGMII_TD2__RGMII_TD2         0x1b0b0
+                       MX6QDL_PAD_RGMII_TD3__RGMII_TD3         0x1b0b0
+                       MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL   0x1b0b0
+                       MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK    0x1b0b0
+                       MX6QDL_PAD_RGMII_RXC__RGMII_RXC         0x1b0b0
+                       MX6QDL_PAD_RGMII_RD0__RGMII_RD0         0x1b0b0
+                       MX6QDL_PAD_RGMII_RD1__RGMII_RD1         0x1b0b0
+                       MX6QDL_PAD_RGMII_RD2__RGMII_RD2         0x1b0b0
+                       MX6QDL_PAD_RGMII_RD3__RGMII_RD3         0x1b0b0
+                       MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL   0x1b0b0
+               >;
+       };
+
+       pinctrl_enet_irq: enetirqgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_GPIO_6__ENET_IRQ     0x000b1
+               >;
+       };
+
+       pinctrl_gpmi_nand: gpminandgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_NANDF_CLE__NAND_CLE          0xb0b1
+                       MX6QDL_PAD_NANDF_ALE__NAND_ALE          0xb0b1
+                       MX6QDL_PAD_NANDF_CS0__NAND_CE0_B        0xb0b1
+                       MX6QDL_PAD_NANDF_CS1__NAND_CE1_B        0xb0b1
+                       MX6QDL_PAD_NANDF_RB0__NAND_READY_B      0xb0b1
+                       MX6QDL_PAD_NANDF_D0__NAND_DATA00        0xb0b1
+                       MX6QDL_PAD_NANDF_D1__NAND_DATA01        0xb0b1
+                       MX6QDL_PAD_NANDF_D2__NAND_DATA02        0xb0b1
+                       MX6QDL_PAD_NANDF_D3__NAND_DATA03        0xb0b1
+                       MX6QDL_PAD_NANDF_D4__NAND_DATA04        0xb0b1
+                       MX6QDL_PAD_NANDF_D5__NAND_DATA05        0xb0b1
+                       MX6QDL_PAD_NANDF_D6__NAND_DATA06        0xb0b1
+                       MX6QDL_PAD_NANDF_D7__NAND_DATA07        0xb0b1
+                       MX6QDL_PAD_SD4_CMD__NAND_RE_B           0xb0b1
+                       MX6QDL_PAD_SD4_CLK__NAND_WE_B           0xb0b1
+                       MX6QDL_PAD_NANDF_WP_B__NAND_WP_B        0xb0b1
+               >;
+       };
+
+       pinctrl_hog: hoggrp {
+               fsl,pins = <
+                       /* CTW6120 IRQ */
+                       MX6QDL_PAD_EIM_DA7__GPIO3_IO07          0xb0b1
+                       /* SDMMC2 CD/WP */
+                       MX6QDL_PAD_KEY_COL4__GPIO4_IO14         0x1b0b0
+                       MX6QDL_PAD_KEY_ROW4__GPIO4_IO15         0x1b0b0
+               >;
+       };
+
+       pinctrl_i2c1: i2c1grp {
+               fsl,pins = <
+                       MX6QDL_PAD_CSI0_DAT8__I2C1_SDA  0x4001b8b1
+                       MX6QDL_PAD_CSI0_DAT9__I2C1_SCL  0x4001b8b1
+               >;
+       };
+
+       pinctrl_i2c2: i2c2grp {
+               fsl,pins = <
+                       MX6QDL_PAD_KEY_COL3__I2C2_SCL   0x4001b8b1
+                       MX6QDL_PAD_KEY_ROW3__I2C2_SDA   0x4001b8b1
+               >;
+       };
+
+       pinctrl_i2c3: i2c3grp {
+               fsl,pins = <
+                       MX6QDL_PAD_GPIO_5__I2C3_SCL     0x4001b8b1
+                       MX6QDL_PAD_GPIO_16__I2C3_SDA    0x4001b8b1
+               >;
+       };
+
+       pinctrl_pmic: pmicgrp {
+               fsl,pins = <
+                       /* PMIC INT */
+                       MX6QDL_PAD_GPIO_17__GPIO7_IO12  0x1b0b0
+               >;
+       };
+
+       pinctrl_pwm2: pwm2grp {
+               fsl,pins = <
+                       MX6QDL_PAD_DISP0_DAT9__PWM2_OUT 0x1b0b1
+               >;
+       };
+
+       pinctrl_uart1: uart1grp {
+               fsl,pins = <
+                       MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
+                       MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
+               >;
+       };
+
+       pinctrl_uart2: uart2grp {
+               fsl,pins = <
+                       MX6QDL_PAD_SD3_DAT4__UART2_RX_DATA      0x1b0b1
+                       MX6QDL_PAD_SD3_DAT5__UART2_TX_DATA      0x1b0b1
+                       MX6QDL_PAD_EIM_D28__UART2_CTS_B         0x1b0b1
+                       MX6QDL_PAD_EIM_D29__UART2_RTS_B         0x1b0b1
+               >;
+       };
+
+       pinctrl_usdhc3: usdhc3grp {
+               fsl,pins = <
+                       MX6QDL_PAD_SD3_CMD__SD3_CMD     0x17069
+                       MX6QDL_PAD_SD3_CLK__SD3_CLK     0x10069
+                       MX6QDL_PAD_SD3_DAT0__SD3_DATA0  0x17069
+                       MX6QDL_PAD_SD3_DAT1__SD3_DATA1  0x17069
+                       MX6QDL_PAD_SD3_DAT2__SD3_DATA2  0x17069
+                       MX6QDL_PAD_SD3_DAT3__SD3_DATA3  0x17069
+                       /* WL_EN */
+                       MX6QDL_PAD_SD3_DAT7__GPIO6_IO17 0x13059
+                       /* WL_IRQ */
+                       MX6QDL_PAD_SD3_RST__GPIO7_IO08  0x13059
+               >;
+       };
+
+       pinctrl_usdhc3_100mhz: usdhc3grp100mhzgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_SD3_CMD__SD3_CMD     0x170B9
+                       MX6QDL_PAD_SD3_CLK__SD3_CLK     0x100B9
+                       MX6QDL_PAD_SD3_DAT0__SD3_DATA0  0x170B9
+                       MX6QDL_PAD_SD3_DAT1__SD3_DATA1  0x170B9
+                       MX6QDL_PAD_SD3_DAT3__SD3_DATA3  0x170B9
+                       MX6QDL_PAD_SD3_DAT3__SD3_DATA3  0x170B9
+                       /* WL_EN */
+                       MX6QDL_PAD_SD3_DAT7__GPIO6_IO17 0x130B9
+                       /* WL_IRQ */
+                       MX6QDL_PAD_SD3_RST__GPIO7_IO08  0x130B9
+               >;
+       };
+
+       pinctrl_usdhc3_200mhz: usdhc3grp200mhzgrp {
+               fsl,pins = <
+                       MX6QDL_PAD_SD3_CMD__SD3_CMD     0x170F9
+                       MX6QDL_PAD_SD3_CLK__SD3_CLK     0x100F9
+                       MX6QDL_PAD_SD3_DAT0__SD3_DATA0  0x170F9
+                       MX6QDL_PAD_SD3_DAT1__SD3_DATA1  0x170F9
+                       MX6QDL_PAD_SD3_DAT2__SD3_DATA2  0x170F9
+                       MX6QDL_PAD_SD3_DAT3__SD3_DATA3  0x170F9
+                       /* WL_EN */
+                       MX6QDL_PAD_SD3_DAT7__GPIO6_IO17 0x130F9
+                       /* WL_IRQ */
+                       MX6QDL_PAD_SD3_RST__GPIO7_IO08  0x130F9
+               >;
+       };
+};
+
+&pwm2 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_pwm2>;
+       status = "okay";
+};
+
+&reg_arm {
+       vin-supply = <&sw1a_reg>;
+};
+
+&reg_pu {
+       vin-supply = <&sw1c_reg>;
+};
+
+&reg_soc {
+       vin-supply = <&sw1c_reg>;
+};
+
+&reg_vdd1p1 {
+       vin-supply = <&vgen5_reg>;
+};
+
+&reg_vdd2p5 {
+       vin-supply = <&vgen5_reg>;
+};
+
+&snvs_poweroff {
+       status = "okay";
+};
+
+&ssi2 {
+       status = "okay";
+};
+
+&uart1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_uart1>;
+       status = "okay";
+};
+
+&uart2 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_uart2 &pinctrl_bt>;
+       uart-has-rtscts;
+       status = "okay";
+};
+
+&usbh1 {
+       vbus-supply = <&reg_usb_h1_vbus>;
+       status = "okay";
+};
+
+&usbotg {
+       vbus-supply = <&reg_usb_otg_vbus>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_usbotg_var>;
+       disable-over-current;
+       dr_mode = "host";
+       status = "okay";
+};
+
+&usbphy1 {
+       fsl,tx-d-cal = <0x5>;
+};
+
+&usbphy2 {
+       fsl,tx-d-cal = <0x5>;
+};
+
+&usdhc1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_usdhc1>;
+       non-removable;
+       keep-power-in-suspend;
+       status = "okay";
+};
+
+&usdhc3 {
+       pinctrl-names = "default", "state_100mhz", "state_200mhz";
+       pinctrl-0 = <&pinctrl_usdhc3>;
+       pinctrl-1 = <&pinctrl_usdhc3_100mhz>;
+       pinctrl-2 = <&pinctrl_usdhc3_200mhz>;
+       bus-width = <4>;
+       vmmc-supply = <&reg_wl18xx_vmmc>;
+       non-removable;
+       wakeup-source;
+       keep-power-in-suspend;
+       cap-power-off-card;
+       #address-cells = <1>;
+       #size-cells = <0>;
+       status = "okay";
+
+       wifi: wifi@2 {
+               compatible = "ti,wl1835";
+               reg = <2>;
+               interrupt-parent = <&gpio6>;
+               interrupts = <17 IRQ_TYPE_EDGE_RISING>;
+               ref-clock-frequency = <38400000>;
+       };
+};