boobypi

Totally agree, too little or niche market! I 'm thinking about soldering simcard directly on these cheap minipci lte modem and use a regular usb2.0 cable, what a joke!

Thanks for your input, I never really use gpio lib and i don't know if gpio over i2c is userland playable or there are reserved to the kernel. The fact on the schematic is VSYS_3V3_EXP is the first rail powering up because it's supply I2Cs bus and the GPIO over I2C to switch ON or reseting thing. VCC5V0_DEVICE_S0 For FAN & HDMI & USB & TYPE-C, USB HUB (Total: 3A) switch on by RK806S over I2C (PMIC_PWR_CTRL2) VSYS_3V3_EXP For CSI & DSI & RPi 40Pin (Total: 4A) <======== I2Cs GPIO (LTE RESET), Minipcie is supplied here! , switch on by RK3576 gpio (VSYS_3V3_EXP_EN) VCC3V3_PCIE For PCIE-M.2 (nvme), switch on by RK3576 gpio (PCIE_PWREN_H_GPIO0B5) The design flaw is here : you need I2C up to put LTE modem (already on by the same I2C power supply) in reset state before switch on USB PHY, then release LTE_RESET. Why they didn't put LTE modem supply, triggering a 3.3vcc mosfet from USB 5V rail ready signal after usb init like normal usb device, too easy?

At the finnest, i cut the reset pin (22) on my minipcie module. Same all USB port lockdown. I put this modified lte modem in my external usb case, modem always working fine. So i take a spare new LTE modem and i connect it "hotplug" on the recomputer minipcie while already booted : lsusb see my Quectel LTE module!

Maybe it's just relative to reset pin on the LTE modem, locking down all the shared USB BUS. On the dts, we can activate LTE_RESET : &i2c4 { status = "okay"; pinctrl-0 = <&i2c4m3_xfer>; gpio_xten: gpio_xten@21 { compatible = "nxp,pca9535"; reg = <0x21>; gpio-controller; #gpio-cells = <2>; interrupt-controller; gpio-line-names = "MIPI_DPHY_CSI0_IO1" ,"USB_USB30_PWREN_H", "USB_HOST_PWREN_H" ,"BRD_ID_WP", "LTE_RESET" ,"P05", "P06" ,"LoRaWan_sx1262_CS", "USER_LED_R" ,"USER_LED_B", "USER_LED_G" ,"P13", "P14" ,"P15", "P16" ,"P17"; gpio-line-offsets = <0>, <1>, <2>, <3>, <4>, <5>, <6>, <7>, <8>, <9>, <10>, <11>, <12>, <13>, <14>, <15>; }; On the LTE modem manual, reset is active when LTE_RESET is low, and pullup to vcc in normal operation. If LTE_RESET stay low with onboard modem connected, LTE modem may lock all USB ports. How can I define LTE_RESET to 1 at the boot?

Hello, I just received my SeedStudio Recomputer RK3576 and I have a well working machine thanks to the armbian team using the debian Forky image. I try to understand why i cannot connect a (usb) minipcie modem (already testing 1 year use with Radxa zero 3 W), all usb ports not working anymore! There is a strange note on schematic pdf : If the PCIe1 or SATA1 function of Combo PHY1 is selected, the USB3 OTG1 function cannot be used, and even the USB2 PHY1 function cannot be used But they also notice the support of usb link on this minipcie : LTE LoRa Module: Module:EC20/EC25 WM1302 SPI/USB Version Zigbee: USB Version The miniPCIe is connected on USBHUB_HOST3 <- USB HUB external chip -> USB2_HOST1 (RK3576 soc). All USB phy fail, even USB PHY not related to this usb hub. lsusb didn't show my usb modem, even if there no usb devices connected. I bought this nice machine as my home router with internal 4G modem quectel EC200A-EU but at this time ,my plan fail. The idle powerdraw with nvme onboard is under 2W and wifi sta active, Nice dietpi hardware! Thanks for your input (how to make this minipcie working, disable usb port is a possible tradeoff for me) Seb