Re: [PATCH] arm64: dts: imx8mm: add support for compulab iot gateway

From: Parthiban
Date: Thu Feb 29 2024 - 03:39:32 EST

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Thanks for the review Krzysztof. I will send v2 after fixing the review comments.

Thanks,
Parthiban N

On 5/12/23 11:47, Krzysztof Kozlowski wrote:
> On 12/05/2023 07:52, Parthiban Nallathambi wrote:
>> Add support for compulab for imx8mm IoT gateway with
>> UCM-iMX8M-Mini SoM. IoT gateway comes with dual ethernet,
>> USB and IO expansion.
>>
>> WLAN, Bluetooth can be part of SoM or extended over PCIE.
>>
>> Signed-off-by: Parthiban Nallathambi <parthiban@xxxxxxxxxxx>
>> ---
>> .../devicetree/bindings/arm/fsl.yaml | 2 +
>> .../bindings/net/microchip,lan95xx.yaml | 1 +
>> arch/arm64/boot/dts/freescale/Makefile | 1 +
>> .../freescale/imx8mm-compulab-iot-gate.dts | 315 +++++++++++
>> .../dts/freescale/imx8mm-compulab-ucm.dtsi | 532 ++++++++++++++++++
>> 5 files changed, 851 insertions(+)
>> create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-compulab-iot-gate.dts
>> create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-compulab-ucm.dtsi
>>
>> diff --git a/Documentation/devicetree/bindings/arm/fsl.yaml b/Documentation/devicetree/bindings/arm/fsl.yaml
>> index 15d411084065..d2425c5ed4b7 100644
>> --- a/Documentation/devicetree/bindings/arm/fsl.yaml
>> +++ b/Documentation/devicetree/bindings/arm/fsl.yaml
>> @@ -895,6 +895,8 @@ properties:
>> - description: i.MX8MM based Boards
>> items:
>> - enum:
>> + - compulab,imx8mm-ucm-som # UCM-iMX8M-Mini Compulab SoM
>> + - compulab,iot-gate-imx8 # iMX8M IoT Compulab Gateway with UCM-iMX8M-Mini
>
> Bindings are always separate patches.
>
> Please run scripts/checkpatch.pl and fix reported warnings. Checkpatch
> tells you this, so you apparently did not run it.
>
>
>> - beacon,imx8mm-beacon-kit # i.MX8MM Beacon Development Kit
>> - boundary,imx8mm-nitrogen8mm # i.MX8MM Nitrogen Board
>> - dmo,imx8mm-data-modul-edm-sbc # i.MX8MM eDM SBC
>> diff --git a/Documentation/devicetree/bindings/net/microchip,lan95xx.yaml b/Documentation/devicetree/bindings/net/microchip,lan95xx.yaml
>> index 0b97e14d947f..86279724695e 100644
>> --- a/Documentation/devicetree/bindings/net/microchip,lan95xx.yaml
>> +++ b/Documentation/devicetree/bindings/net/microchip,lan95xx.yaml
>> @@ -22,6 +22,7 @@ properties:
>> - enum:
>> - usb424,9500 # SMSC9500 USB Ethernet Device
>> - usb424,9505 # SMSC9505 USB Ethernet Device
>> + - usb424,9514 # SMSC9514 USB Ethernet Device
>
> No, really, I could understand squashing board bindings here but
> changing drivers in the same patch is clearly too much.
>
>> - usb424,9530 # SMSC LAN9530 USB Ethernet Device
>> - usb424,9730 # SMSC LAN9730 USB Ethernet Device
>> - usb424,9900 # SMSC9500 USB Ethernet Device (SAL10)
>> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
>> index ef7d17aef58f..2a613c576d29 100644
>> --- a/arch/arm64/boot/dts/freescale/Makefile
>> +++ b/arch/arm64/boot/dts/freescale/Makefile
>> @@ -51,6 +51,7 @@ dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-ls1028a-qds-9999.dtb
>>
>> dtb-$(CONFIG_ARCH_MXC) += imx8dxl-evk.dtb
>> dtb-$(CONFIG_ARCH_MXC) += imx8mm-beacon-kit.dtb
>> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-compulab-iot-gate.dtb
>> dtb-$(CONFIG_ARCH_MXC) += imx8mm-data-modul-edm-sbc.dtb
>> dtb-$(CONFIG_ARCH_MXC) += imx8mm-ddr4-evk.dtb
>> dtb-$(CONFIG_ARCH_MXC) += imx8mm-emcon-avari.dtb
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-compulab-iot-gate.dts b/arch/arm64/boot/dts/freescale/imx8mm-compulab-iot-gate.dts
>> new file mode 100644
>> index 000000000000..678a9022549f
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/freescale/imx8mm-compulab-iot-gate.dts
>> @@ -0,0 +1,315 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Copyright 2018 Compulab
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "imx8mm-compulab-ucm.dtsi"
>> +
>> +/ {
>> + model = "CompuLab IOT-GATE-iMX8 board";
>> + compatible = "compulab,iot-gate-imx8", "compulab,imx8mm-ucm-som", "fsl,imx8mm";
>> +
>> + regulator-usbhub-ena {
>> + compatible = "regulator-fixed";
>> + regulator-name = "usbhub_ena";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio4 28 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + regulator-usbhub-rst {
>> + compatible = "regulator-fixed";
>> + regulator-name = "usbhub_rst";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio3 24 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + regulator-uart1-mode {
>> + compatible = "regulator-fixed";
>> + regulator-name = "uart1_mode";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio4 26 GPIO_ACTIVE_HIGH>;
>> + enable-active-high;
>> + regulator-always-on;
>> + };
>> +
>> + regulator-uart1-duplex {
>> + compatible = "regulator-fixed";
>> + regulator-name = "uart1_duplex";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio4 27 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + regulator-uart1-shdn {
>> + compatible = "regulator-fixed";
>> + regulator-name = "uart1_shdn";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio5 5 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + regulator-uart1-trmen {
>> + compatible = "regulator-fixed";
>> + regulator-name = "uart1_trmen";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio4 25 GPIO_ACTIVE_LOW>;
>> + regulator-always-on;
>> + enable-active-low;
>> + };
>> +
>> + regulator-usdhc2_v {
>
> No underscores in node names. Fix it everywhere.
>
>> + compatible = "regulator-fixed";
>> + regulator-name = "usdhc2_v";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio1 4 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + reg_usdhc2_rst: regulator-usdhc2_rst {
>> + compatible = "regulator-fixed";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_reg_usdhc2_rst>;
>> + regulator-name = "usdhc2_rst";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
>> + startup-delay-us = <100>;
>> + off-on-delay-us = <12000>;
>> + enable-active-high;
>> + };
>> +
>> + regulator-mpcie2_rst {
>> + compatible = "regulator-fixed";
>> + regulator-name = "mpcie2_rst";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio3 22 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + regulator-mpcie2lora_dis {
>> + compatible = "regulator-fixed";
>> + regulator-name = "mpcie2lora_dis";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + gpio = <&gpio3 21 GPIO_ACTIVE_HIGH>;
>> + regulator-always-on;
>> + enable-active-high;
>> + };
>> +
>> + pcie0_refclk: pcie0-refclk {
>> + compatible = "fixed-clock";
>> + #clock-cells = <0>;
>> + clock-frequency = <100000000>;
>> + };
>> +};
>> +
>> +&ethphy0 {
>> + status = "okay";
>> +};
>> +
>> +&fec1 {
>> + status = "okay";
>> +};
>> +
>> +&uart1 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_uart1 &pinctrl_uart1_gpio>;
>> + assigned-clocks = <&clk IMX8MM_CLK_UART1>;
>> + assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_80M>;
>> + linux,rs485-enabled-at-boot-time;
>> + rts-gpios = <&gpio4 24 GPIO_ACTIVE_LOW>;
>> + status = "okay";
>> +};
>> +
>> +&uart4 {
>> + status = "disabled";
>> +};
>> +
>> +&i2c1 {
>> + clock-frequency = <100000>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_i2c1>;
>> + status = "okay";
>> +
>> + eeprom@54 {
>> + compatible = "atmel,24c08";
>> + reg = <0x54>;
>> + pagesize = <16>;
>> + };
>> +};
>> +
>> +&ecspi1 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + fsl,spi-num-chipselects = <1>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_ecspi1 &pinctrl_ecspi1_cs>;
>> + cs-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
>> + status = "okay";
>> +};
>> +
>> +&usbotg1 {
>> + dr_mode = "host";
>> + disable-over-current;
>> + status = "okay";
>> +};
>> +
>> +&usbotg2 {
>> + dr_mode = "host";
>> + disable-over-current;
>> + status = "okay";
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + usb9514@1 {
>
> Node names should be generic.
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
>
>> + compatible = "usb424,9514";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_usb9514>;
>> + reg = <1>;
>
> reg is always after compatible.
>
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + ethernet: usbether@1 {
>> + compatible = "usb424,ec00";
>> + reg = <1>;
>> + };
>> + };
>> +};
>> +
>> +&usdhc1 {
>> + status = "disabled";
>> +};
>> +
>> +&usdhc2 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_usdhc2>;
>> + bus-width = <4>;
>> + mmc-ddr-1_8v;
>> + non-removable;
>> + vmmc-supply = <&reg_usdhc2_rst>;
>> + status = "okay";
>> +};
>> +
>> +&pcie0 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_pcie0>;
>> + reset-gpio = <&gpio3 20 GPIO_ACTIVE_LOW>;
>> + clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>,
>> + <&clk IMX8MM_CLK_PCIE1_AUX>,
>> + <&clk IMX8MM_CLK_PCIE1_PHY>,
>> + <&pcie0_refclk>;
>> + clock-names = "pcie", "pcie_aux", "pcie_phy", "pcie_bus";
>> + assigned-clocks = <&clk IMX8MM_CLK_PCIE1_AUX>,
>> + <&clk IMX8MM_CLK_PCIE1_PHY>,
>> + <&clk IMX8MM_CLK_PCIE1_CTRL>;
>> + assigned-clock-rates = <10000000>, <100000000>, <250000000>;
>> + assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_50M>,
>> + <&clk IMX8MM_SYS_PLL2_100M>,
>> + <&clk IMX8MM_SYS_PLL2_250M>;
>> + ext_osc = <1>;
>> + status = "disabled";
>> +};
>> +
>> +&iomuxc {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_hog_sb_iotgimx8>;
>> +
>> + sb-iotgimx8 {
>> + pinctrl_hog_sb_iotgimx8: hoggrp_sb-iotgimx8 {
>
> Does not look like you tested the DTS against bindings. Please run `make
> dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
> for instructions).
>
>> + fsl,pins = <
>> + /* mPCIe2 */
>> + MX8MM_IOMUXC_SAI5_RXD0_GPIO3_IO21 0x140 /* LORA_DISABLE */
>> + MX8MM_IOMUXC_SAI5_RXD1_GPIO3_IO22 0x140 /* PERSTn */
>> + >;
>> + };
>> +
>> + pinctrl_uart1: uart1grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX 0x140
>> + MX8MM_IOMUXC_SAI2_RXFS_UART1_DCE_TX 0x140
>> + MX8MM_IOMUXC_SAI2_TXFS_GPIO4_IO24 0x140 /* RTS */
>> + MX8MM_IOMUXC_SAI2_RXD0_UART1_DCE_RTS_B 0x140 /* CTS */
>> + >;
>> + };
>> +
>> + pinctrl_uart1_gpio: uart1gpiogrp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26 0x000 /* RS_485_232_SEL */
>> + MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27 0x140 /* RS_485_H/F_SEL */
>> + MX8MM_IOMUXC_SPDIF_EXT_CLK_GPIO5_IO5 0x140 /* SHDN */
>> + MX8MM_IOMUXC_SAI2_TXC_GPIO4_IO25 0x140 /* RS_485_TRMEN */
>> + >;
>> + };
>> +
>> + pinctrl_i2c1: i2c1grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_I2C1_SCL_I2C1_SCL 0x400001c3
>> + MX8MM_IOMUXC_I2C1_SDA_I2C1_SDA 0x400001c3
>> + >;
>> + };
>> +
>> + pinctrl_ecspi1: ecspi1grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_ECSPI1_SCLK_ECSPI1_SCLK 0x82
>> + MX8MM_IOMUXC_ECSPI1_MOSI_ECSPI1_MOSI 0x82
>> + MX8MM_IOMUXC_ECSPI1_MISO_ECSPI1_MISO 0x82
>> + >;
>> + };
>> +
>> + pinctrl_ecspi1_cs: ecspi1cs {
>
> Does not look like you tested the DTS against bindings. Please run `make
> dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
> for instructions).
>
> I guess you did not test it at all.
>
>> + fsl,pins = <
>> + MX8MM_IOMUXC_ECSPI1_SS0_GPIO5_IO9 0x40000
>> + >;
>> + };
>> +
>> + pinctrl_usb9514: usb9514grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28 0x140 /* USB_PS_EN */
>> + MX8MM_IOMUXC_SAI5_RXD3_GPIO3_IO24 0x140 /* HUB_RSTn */
>> + >;
>> + };
>> +
>> + pinctrl_usdhc2: usdhc2grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x190
>> + MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d0
>> + MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d0
>> + MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d0
>> + MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d0
>> + MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d0
>> + MX8MM_IOMUXC_GPIO1_IO04_GPIO1_IO4 0x1d0 /* SD2_VSEL */
>> + >;
>> + };
>> +
>> + pinctrl_reg_usdhc2_rst: usdhc2rst {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SD2_RESET_B_GPIO2_IO19 0x41 /* EMMC_RST */
>> + >;
>> + };
>> +
>> + pinctrl_pcie0: pcie0grp {
>> + fsl,pins = <
>> + MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x140
>> + >;
>> + };
>> + };
>> +};
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-compulab-ucm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-compulab-ucm.dtsi
>> new file mode 100644
>> index 000000000000..d6cdf833744e
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/freescale/imx8mm-compulab-ucm.dtsi
>> @@ -0,0 +1,532 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Copyright 2018 Compulab
>> + */
>> +
>> +#include "imx8mm.dtsi"
>> +
>> +/ {
>> + model = "Compulab i.MX8M-Mini UCM SoM";
>> + compatible = "compulab,imx8mm-ucm-som", "fsl,imx8mm";
>> +
>> + aliases {
>> + rtc0 = &rtc0;
>> + rtc1 = &snvs_rtc;
>> + };
>> +
>> + leds {
>> + compatible = "gpio-leds";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_gpio_led>;
>> +
>> + heartbeat-led {
>> + label = "Heartbeat";
>> + gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
>> + linux,default-trigger = "heartbeat";
>> + };
>> + };
>> +
>> + pmic_osc: clock-pmic {
>> + compatible = "fixed-clock";
>> + #clock-cells = <0>;
>> + clock-frequency = <32768>;
>> + clock-output-names = "pmic_osc";
>> + };
>> +
>> + reg_ethphy: regulator-ethphy {
>> + compatible = "regulator-fixed";
>> + enable-active-high;
>> + gpio = <&gpio1 10 GPIO_ACTIVE_HIGH>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_reg_eth>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + regulator-name = "On-module +V3.3_ETH";
>> + startup-delay-us = <500>;
>> + };
>> +
>> + reg_usdhc3_vmmc: regulator-usdhc3-vmmc {
>> + compatible = "regulator-fixed";
>> + enable-active-high;
>> + gpio = <&gpio3 16 GPIO_ACTIVE_HIGH>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_reg_usdhc3>;
>> + regulator-always-on;
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + regulator-name = "On-module +V3.3_USDHC";
>> + };
>> +
>> + usdhc1_pwrseq: usdhc1_pwrseq {
>> + compatible = "mmc-pwrseq-simple";
>> + reset-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
>> + };
>> +};
>> +
>> +&fec1 {
>> + fsl,magic-packet;
>> + fsl,rgmii_rxc_dly;
>> + phy-handle = <&ethphy0>;
>> + phy-mode = "rgmii-id";
>> + phy-supply = <&reg_ethphy>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_fec1>;
>> +
>> + mdio {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + ethphy0: ethernet-phy@0 {
>> + compatible = "ethernet-phy-ieee802.3-c22";
>> + micrel,led-mode = <0>;
>> + reg = <0>;
>> + };
>> + };
>> +};
>> +
>> +&i2c2 {
>> + clock-frequency = <400000>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_i2c2>;
>> + status = "okay";
>> +
>> + rtc0: rtc@69 {
>> + compatible = "abracon,ab1805";
>> + reg = <0x69>;
>> + };
>> +
>> + pmic: bd71837@4b {
>
> Node names should be generic.
> https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
>
>
>
> Best regards,
> Krzysztof
>

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