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This board is a new design based on the i.MX8MP System on Module and does not share much hardware with previous HummingBoard variants. > > It comes with some common features: > - 3x USB-3.0 Type A connector > - 2x 1Gbps RJ45 Ethernet > - USB Type-C Console Port > - microSD connector > - RTC with backup battery > - RGB Status LED > - 1x M.2 M-Key connector with PCI-E Gen. 3 x1 > - 1x M.2 B-Key connector with USB-2.0/3.0 + SIM card holder > - 1x LVDS Display Connector > - 1x DSI Display Connector > - GPIO header > - 2x RS232/RS485 ports (configurable) > - 2x CAN > > In addition there is a board-to-board expansion connector to support > custom daughter boards with access to SPI, a range of GPIOs and - > notably - CAN and UART. Both 2x CAN and 2x UART can be muxed either > to this b2b connector, or a termianl block connector on the base board. > > The routing choice for UART and CAN is expressed through gpio > mux-controllers in DT and can be changed by applying dtb addons. s/addons/overlay > > Signed-off-by: Josua Mayer > --- > arch/arm64/boot/dts/freescale/Makefile | 2 + > .../dts/freescale/imx8mp-hummingboard-iiot.dts | 719 +++++++++++++++++++++ > 2 files changed, 721 insertions(+) > ... > + > + uart3_rs_232_485_mux: mux-controller-4 { > + compatible = "gpio-mux"; > + #mux-control-cells = <0>; > + /* > + * Mux switches uart3 tx/rx between rs232 and rs485 > + * transceivers. using one GPIO: 0 = rs232; 1 = rs485. > + */ > + mux-gpios = <&tca6416_u20 1 GPIO_ACTIVE_HIGH>; > + /* default rs232 */ > + idle-state = <0>; > + }; > + > + uart4_rs_232_485_mux: mux-controller-5 { > + compatible = "gpio-mux"; > + #mux-control-cells = <0>; > + /* > + * Mux switches uart4 tx/rx between rs232 and rs485 > + * transceivers. using one GPIO: 0 = rs232; 1 = rs485. > + */ > + mux-gpios = <&tca6416_u20 2 GPIO_ACTIVE_HIGH>; > + /* default rs232 */ > + idle-state = <0>; > + }; > + > + gpio-keys { please order as node name. suggest use https://github.com/lznuaa/dt-format to reorder it. > + compatible = "gpio-keys"; > + > + wakeup-event { > + label = "m2-m-wakeup"; > + interrupts-extended = <&tca6416_u21 11 IRQ_TYPE_EDGE_FALLING>; > + linux,code = ; > + wakeup-source; > + }; > + }; > +}; > + ... > + > +&i2c2 { > + i2c-mux@70 { > + compatible = "nxp,pca9546"; > + reg = <0x70>; > + /* > + * This reset is open drain, > + * but reset core does not support GPIO_OPEN_DRAIN flag. > + */ > + reset-gpios = <&tca6416_u21 2 GPIO_ACTIVE_LOW>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + /* channel 0 routed to expansion connector (J22) */ > + i2c_exp: i2c@0 { > + reg = <0>; > + #address-cells = <1>; > + #size-cells = <0>; > + }; > + > + /* channel 1 routed to mipi-csi connector (J23) */ > + i2c_csi: i2c@1 { > + reg = <1>; > + #address-cells = <1>; > + #size-cells = <0>; > + }; > + > + /* channel 2 routed to mipi-dsi connector (J25) */ > + i2c_dsi: i2c@2 { > + reg = <2>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + tca6408_u48: gpio@21 { > + compatible = "ti,tca6408"; > + reg = <0x21>; > + /* > + * reset shared between U37 and U48, to be > + * supported once gpio-pca953x switches to > + * reset framework. > + * > + * reset-gpios = <&tca6416_u21 4 (GPIO_ACTIVE_LOW|GPIO_PULL_UP|GPIO_OPEN_DRAIN)>; dose checkpatch report error? line width over 100 Frank > + */ > + gpio-controller; > + #gpio-cells = <2>; > + gpio-line-names = "CAM_RST#", "DSI_RESET", > + "DSI_STBYB", "DSI_PWM_BL", > + "DSI_L/R", "DSI_U/D", > + "DSI_CTP_/RST", "CAM_TRIG"; > + }; > + }; > + > + /* channel 2 routed to lvds connector (J24) */ > + i2c_lvds: i2c@3 { > + reg = <3>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + tca6408_u37: gpio@20 { > + compatible = "ti,tca6408"; > + reg = <0x20>; > + /* > + * reset shared between U37 and U48, to be > + * supported once gpio-pca953x switches to > + * reset framework. > + * > + * reset-gpios = <&tca6416_u21 4 (GPIO_ACTIVE_LOW|GPIO_PULL_UP|GPIO_OPEN_DRAIN)>; > + */ > + gpio-controller; > + #gpio-cells = <2>; > + gpio-line-names = "SELB", "LVDS_RESET", > + "LVDS_STBYB", "LVDS_PWM_BL", > + "LVDS_L/R", "LVDS_U/D", > + "LVDS_CTP_/RST", ""; > + }; > + }; > + }; > +}; > + > +&i2c3 { > + /* highest i2c clock supported by all peripherals is 400kHz */ > + clock-frequency = <400000>; > + > + tca6416_u20: gpio@20 { > + /* > + * This is a TI TCAL6416 using same programming model as > + * NXP PCAL6416, not to be confused with TI TCA6416. > + */ > + compatible = "nxp,pcal6416"; > + reg = <0x20>; > + gpio-controller; > + #gpio-cells = <2>; > + gpio-line-names = "TCA_INT/EXT_UART", "TCA_UARTA_232/485", > + "TCA_UARTB_232/485", "TCA_INT/EXT_CAN", > + "TCA_NXP/REN", "TCA_M.2B_3V3_EN", > + "TCA_M.2M_3V3_EN", "TCA_M.2M_RESET#", > + "TCA_M.2B_RESET#", "TCA_M.2B_W_DIS#", > + "TCA_M.2B_GPS_EN#", "TCA_USB-HUB_RST#", > + "TCA_USB_HUB3_PWR_EN", "TCA_USB_HUB4_PWR_EN", > + "TCA_USB1_PWR_EN", "TCA_VIDEO_PWR_EN"; > + > + m2-b-reset-hog { > + gpio-hog; > + gpios = <8 GPIO_ACTIVE_LOW>; > + output-low; > + line-name = "m2-b-reset"; > + }; > + }; > + > + tca6416_u21: gpio@21 { > + /* > + * This is a TI TCAL6416 using same programming model as > + * NXP PCAL6416, not to be confused with TI TCA6416. > + */ > + compatible = "nxp,pcal6416"; > + reg = <0x21>; > + gpio-controller; > + #gpio-cells = <2>; > + interrupt-controller; > + #interrupt-cells = <2>; > + pinctrl-names = "default"; > + pinctrl-0 = <&tca6416_u21_int_pins>; > + interrupts-extended = <&gpio1 15 IRQ_TYPE_EDGE_FALLING>; > + gpio-line-names = "TCA_SPI_TPM/EXT", "TCA_TPM_RST#", > + "TCA_I2C_RST", "TCA_RS232_SHTD#", > + "TCA_LCD_I2C_RST", "TCA_DIG_OUT1", > + "TCA_bDIG_IN1", "TCA_SENS_INT", > + "TCA_ALERT#", "TCA_TPM_PIRQ#", > + "TCA_RTC_INT", "TCA_M.2M_WAKW_ON_LAN", > + "TCA_M.2M_CLKREQ#", "TCA_LVDS_INT#", > + "", "TCA_POE_AT"; > + > + rs232_shutdown: rs232-shutdown-hog { > + gpio-hog; > + gpios = <3 GPIO_ACTIVE_LOW>; > + output-low; > + line-name = "rs232-shutdown"; > + }; > + > + lcd-i2c-reset-hog { > + /* > + * reset shared between U37 and U48, to be > + * supported once gpio-pca953x switches to > + * reset framework. > + */ > + gpio-hog; > + gpios = <4 (GPIO_ACTIVE_LOW|GPIO_PULL_UP|GPIO_OPEN_DRAIN)>; > + output-low; > + line-name = "lcd-i2c-reset"; > + }; > + > + m2-m-clkreq-hog { > + gpio-hog; > + gpios = <12 GPIO_ACTIVE_LOW>; > + input; > + line-name = "m2-m-clkreq"; > + }; > + }; > + > + led-controller@30 { > + compatible = "ti,lp5562"; > + reg = <0x30>; > + /* use internal clock, could use external generated by rtc */ > + clock-mode = /bits/ 8 <1>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + multi-led@0 { > + reg = <0x0>; > + label = "D7"; > + color = ; > + #address-cells = <1>; > + #size-cells = <0>; > + > + led@0 { > + reg = <0x0>; > + color = ; > + led-cur = /bits/ 8 <0x32>; > + max-cur = /bits/ 8 <0x64>; > + }; > + > + led@1 { > + reg = <0x1>; > + color = ; > + led-cur = /bits/ 8 <0x19>; > + max-cur = /bits/ 8 <0x32>; > + }; > + > + led@2 { > + reg = <0x2>; > + color = ; > + led-cur = /bits/ 8 <0x19>; > + max-cur = /bits/ 8 <0x32>; > + }; > + }; > + > + led@3 { > + reg = <0x3>; > + chan-name = "D8"; > + label = "D8"; > + color = ; > + led-cur = /bits/ 8 <0x19>; > + max-cur = /bits/ 8 <0x64>; > + }; > + }; > + > + light-sensor@44 { > + compatible = "isil,isl29023"; > + reg = <0x44>; > + /* IRQ shared between accelerometer, light-sensor and Tamper input (J5007) */ > + interrupts-extended = <&tca6416_u21 7 IRQ_TYPE_EDGE_FALLING>; > + }; > + > + accelerometer@53 { > + compatible = "adi,adxl345"; > + reg = <0x53>; > + /* IRQ shared between accelerometer, light-sensor and Tamper input (J5007) */ > + interrupt-names = "INT1"; > + interrupts-extended = <&tca6416_u21 7 IRQ_TYPE_EDGE_FALLING>; > + }; > + > + carrier_eeprom: eeprom@57{ > + compatible = "atmel,24c02"; > + reg = <0x57>; > + pagesize = <8>; > + }; > + > + carrier_rtc: rtc@69 { > + compatible = "abracon,ab1805"; > + reg = <0x69>; > + abracon,tc-diode = "schottky"; > + abracon,tc-resistor = <3>; > + /* > + * AM1805 RTC used on this board has only nTIRQ pins wired, > + * which is for countdown timer irqs only. > + * Driver does not support this, disable for now. > + * > + * interrupts-extended = <&tca6416_u21 10 IRQ_TYPE_EDGE_FALLING>; > + */ > + }; > +}; > + > +&iomuxc { > + can1_pins: pinctrl-can1-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SPDIF_RX__CAN1_RX 0x154 > + MX8MP_IOMUXC_SPDIF_TX__CAN1_TX 0x154 > + >; > + }; > + > + can2_pins: pinctrl-can2-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SAI5_MCLK__CAN2_RX 0x154 > + MX8MP_IOMUXC_SAI5_RXD3__CAN2_TX 0x154 > + >; > + }; > + > + ecspi2_pins: pinctrl-ecspi2-grp { > + fsl,pins = < > + MX8MP_IOMUXC_ECSPI2_SCLK__ECSPI2_SCLK 0x140 > + MX8MP_IOMUXC_ECSPI2_MOSI__ECSPI2_MOSI 0x140 > + MX8MP_IOMUXC_ECSPI2_MISO__ECSPI2_MISO 0x140 > + MX8MP_IOMUXC_ECSPI2_SS0__GPIO5_IO13 0x140 > + >; > + }; > + > + tca6416_u21_int_pins: pinctrl-tca6416-u21-int-grp { > + fsl,pins = < > + MX8MP_IOMUXC_GPIO1_IO15__GPIO1_IO15 0x0 > + >; > + }; > + > + /* UARTA */ > + uart3_pins: pinctrl-uart3-grp { > + fsl,pins = < > + MX8MP_IOMUXC_ECSPI1_SCLK__UART3_DCE_RX 0x140 > + MX8MP_IOMUXC_ECSPI1_MOSI__UART3_DCE_TX 0x140 > + MX8MP_IOMUXC_ECSPI1_SS0__GPIO5_IO09 0x140 > + >; > + }; > + > + /* UARTB */ > + uart4_pins: pinctrl-uart4-grp { > + fsl,pins = < > + MX8MP_IOMUXC_UART4_RXD__UART4_DCE_RX 0x140 > + MX8MP_IOMUXC_UART4_TXD__UART4_DCE_TX 0x140 > + MX8MP_IOMUXC_ECSPI1_MISO__GPIO5_IO08 0x140 > + >; > + }; > + > + usdhc2_pins: pinctrl-usdhc2-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SD2_CLK__USDHC2_CLK 0x190 > + MX8MP_IOMUXC_SD2_CMD__USDHC2_CMD 0x1d0 > + MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0 0x1d0 > + MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1 0x1d0 > + MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2 0x1d0 > + MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3 0x1d0 > + MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT 0x140 > + MX8MP_IOMUXC_SD2_CD_B__USDHC2_CD_B 0x140 > + >; > + }; > + > + usdhc2_100mhz_pins: pinctrl-usdhc2-100mhz-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SD2_CLK__USDHC2_CLK 0x194 > + MX8MP_IOMUXC_SD2_CMD__USDHC2_CMD 0x1d4 > + MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0 0x1d4 > + MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1 0x1d4 > + MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2 0x1d4 > + MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3 0x1d4 > + MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT 0x140 > + MX8MP_IOMUXC_SD2_CD_B__USDHC2_CD_B 0x140 > + >; > + }; > + > + usdhc2_200mhz_pins: pinctrl-usdhc2-200mhz-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SD2_CLK__USDHC2_CLK 0x196 > + MX8MP_IOMUXC_SD2_CMD__USDHC2_CMD 0x1d6 > + MX8MP_IOMUXC_SD2_DATA0__USDHC2_DATA0 0x1d6 > + MX8MP_IOMUXC_SD2_DATA1__USDHC2_DATA1 0x1d6 > + MX8MP_IOMUXC_SD2_DATA2__USDHC2_DATA2 0x1d6 > + MX8MP_IOMUXC_SD2_DATA3__USDHC2_DATA3 0x1d6 > + MX8MP_IOMUXC_GPIO1_IO04__USDHC2_VSELECT 0x140 > + MX8MP_IOMUXC_SD2_CD_B__USDHC2_CD_B 0x140 > + >; > + }; > + > + vmmc_pins: pinctrl-vmmc-grp { > + fsl,pins = < > + MX8MP_IOMUXC_SD2_RESET_B__GPIO2_IO19 0x0 > + >; > + }; > +}; > + > +&pcie { > + reset-gpio = <&tca6416_u20 7 GPIO_ACTIVE_LOW>; > + status = "okay"; > +}; > + > +/* M.2 M-Key (J4) */ > +&pcie_phy { > + clocks = <&hsio_blk_ctrl>; > + clock-names = "ref"; > + fsl,clkreq-unsupported; > + fsl,refclk-pad-mode = ; > + status = "okay"; > +}; > + > +&phy0 { > + leds { > + #address-cells = <1>; > + #size-cells = <0>; > + > + /* ADIN1300 LED_0 pin */ > + led@0 { > + reg = <0>; > + color = ; > + function = LED_FUNCTION_LAN; > + default-state = "keep"; > + }; > + }; > +}; > + > +&phy1 { > + leds { > + #address-cells = <1>; > + #size-cells = <0>; > + > + /* ADIN1300 LED_0 pin */ > + led@0 { > + reg = <0>; > + color = ; > + function = LED_FUNCTION_LAN; > + default-state = "keep"; > + }; > + }; > +}; > + > +&uart3 { > + pinctrl-names = "default"; > + pinctrl-0 = <&uart3_pins>; > + rts-gpios = <&gpio5 9 GPIO_ACTIVE_HIGH>; > + /* select 80MHz parent clock to support maximum baudrate 4Mbps */ > + assigned-clocks = <&clk IMX8MP_CLK_UART3>; > + assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>; > + status = "okay"; > +}; > + > +&uart4 { > + pinctrl-names = "default"; > + pinctrl-0 = <&uart4_pins>; > + rts-gpios = <&gpio5 8 GPIO_ACTIVE_HIGH>; > + /* select 80MHz parent clock to support maximum baudrate 4Mbps */ > + assigned-clocks = <&clk IMX8MP_CLK_UART4>; > + assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>; > + status = "okay"; > +}; > + > +&usb3_phy0 { > + fsl,phy-tx-preemp-amp-tune-microamp = <1200>; > + vbus-supply = <&vbus1>; > + status = "okay"; > +}; > + > +&usb3_0 { > + status = "okay"; > +}; > + > +&usb3_phy1 { > + status = "okay"; > +}; > + > +&usb3_1 { > + status = "okay"; > +}; > + > +&usb_dwc3_0 { > + dr_mode = "host"; > +}; > + > +&usb_dwc3_1 { > + dr_mode = "host"; > + #address-cells = <1>; > + #size-cells = <0>; > + > + hub_2_0: hub@1 { > + compatible = "usb4b4,6502", "usb4b4,6506"; > + reg = <1>; > + peer-hub = <&hub_3_0>; > + reset-gpios = <&tca6416_u20 11 GPIO_ACTIVE_LOW>; > + vdd-supply = <&v_1_2>; > + vdd2-supply = <&v_3_3>; > + }; > + > + hub_3_0: hub@2 { > + compatible = "usb4b4,6500", "usb4b4,6504"; > + reg = <2>; > + peer-hub = <&hub_2_0>; > + reset-gpios = <&tca6416_u20 11 GPIO_ACTIVE_LOW>; > + vdd-supply = <&v_1_2>; > + vdd2-supply = <&v_3_3>; > + }; > +}; > + > +&usdhc2 { > + pinctrl-names = "default", "state_100mhz", "state_200mhz"; > + pinctrl-0 = <&usdhc2_pins>; > + pinctrl-1 = <&usdhc2_100mhz_pins>; > + pinctrl-2 = <&usdhc2_200mhz_pins>; > + vmmc-supply = <&vmmc>; > + bus-width = <4>; > + cap-power-off-card; > + full-pwr-cycle; > + status = "okay"; > +}; > > -- > 2.43.0 > >