add firmware from working rpi

firmware/config.txt

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+# For more options and information see
+# http://rpf.io/configtxt
+# Some settings may impact device functionality. See link above for details
+
+# uncomment if you get no picture on HDMI for a default "safe" mode
+#hdmi_safe=1
+
+# uncomment the following to adjust overscan. Use positive numbers if console
+# goes off screen, and negative if there is too much border
+#overscan_left=16
+#overscan_right=16
+#overscan_top=16
+#overscan_bottom=16
+
+# uncomment to force a console size. By default it will be display's size minus
+# overscan.
+#framebuffer_width=1280
+#framebuffer_height=720
+
+# uncomment if hdmi display is not detected and composite is being output
+#hdmi_force_hotplug=1
+
+# uncomment to force a specific HDMI mode (this will force VGA)
+#hdmi_group=1
+#hdmi_mode=1
+
+# uncomment to force a HDMI mode rather than DVI. This can make audio work in
+# DMT (computer monitor) modes
+#hdmi_drive=2
+
+# uncomment to increase signal to HDMI, if you have interference, blanking, or
+# no display
+#config_hdmi_boost=4
+
+# uncomment for composite PAL
+#sdtv_mode=2
+
+#uncomment to overclock the arm. 700 MHz is the default.
+#arm_freq=800
+
+# Uncomment some or all of these to enable the optional hardware interfaces
+#dtparam=i2c_arm=on
+#dtparam=i2s=on
+#dtparam=spi=on
+
+# Uncomment this to enable infrared communication.
+#dtoverlay=gpio-ir,gpio_pin=17
+#dtoverlay=gpio-ir-tx,gpio_pin=18
+
+# Additional overlays and parameters are documented /boot/overlays/README
+
+# Enable audio (loads snd_bcm2835)
+dtparam=audio=on
+
+# Automatically load overlays for detected cameras
+camera_auto_detect=1
+
+# Automatically load overlays for detected DSI displays
+display_auto_detect=1
+
+# Enable DRM VC4 V3D driver
+dtoverlay=vc4-kms-v3d
+max_framebuffers=2
+
+# Run in 64-bit mode
+arm_64bit=1
+
+# Disable compensation for displays with overscan
+disable_overscan=1
+
+[cm4]
+# Enable host mode on the 2711 built-in XHCI USB controller.
+# This line should be removed if the legacy DWC2 controller is required
+# (e.g. for USB device mode) or if USB support is not required.
+#otg_mode=1
+
+[all]
+
+[pi4]
+# Run as fast as firmware / board allows
+arm_boost=1
+
+[all]
+
+[cm4]
+dtoverlay=dwc2,dr_mode=host
+dtparam=ant2
+enable_uart=1
+force_eeprom_read=0
+disable_poe_fan=1
+
+######## iotg-rpi4 configuration - Begin
+dtoverlay=iotg-rpi4/iotg-rpi4-ie-a,can
+dtoverlay=iotg-rpi4/iotg-rpi4-ie-b,can
+dtoverlay=iotg-rpi4/iotg-rpi4-eeprom
+dtoverlay=iotg-rpi4/iotg-rpi4-rtc
+dtoverlay=iotg-rpi4/iotg-rpi4-gpio-exp
+######## iotg-rpi4 configuration - End

firmware/overlays/iotg-rpi4/README

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+Name:   iotg-rpi4-eeprom
+Info:   Compulab IOTG-RPi4 EEPROM AT24C08 over I2C6 bus, address 0x54
+        The EEPROM stores sensitive Manufacturing Data which should
+        not be changed or modified
+Load:   dtoverlay=iotg-rpi4-eeprom
+Params: <None>
+
+Name:   iotg-rpi4-gpio-exp
+Info:   Compulab IOTG-RPi4 GPIO Expanders PCA9555 over I2C6 bus
+         - #1: address 0x27: user LEDs, various RST signals for internal use
+         - #2: address 0x21: IEx type detect signals
+Load:   dtoverlay=iotg-rpi4-gpio-exp
+Params: <None>
+
+Name:   iotg-rpi4-rtc
+Info:   Compulab IOTG-RPi4 RTC AM1805 I2C1 bus, address 0x69
+Load:   dtoverlay=iotg-rpi4-rtc
+Params: <None>
+
+Name:   iotg-rpi4-tpm
+Info:   Compulab IOTG-RPi4 TPM SLB9670 by Infineon over SPI1 bus, CS1
+Load:   dtoverlay=iotg-rpi4-tpm
+Params: <None>
+
+Name:   iotg-rpi4-dio
+Info:   Compulab IOTG-RPi4 Digital inputs and outputs (DIO) extension module
+Load:   dtoverlay=iotg-rpi4-dio,<param>
+Params: ab                  Configure slot A as output (GPIOs 0-3) and
+                            slot B as input  (GPIOs 4-7)
+                            (boolean, optional)
+        cd                  Configure slot C as output (GPIOs 8-11) and
+                            slot D as input  (GPIOs 18-21)
+                            (boolean, optional)
+
+Name:   iotg-rpi4-ie-a
+Info:   Compulab IOTG-RPi4 IEA extension module
+Load:   dtoverlay=iotg-rpi4-ie-a,<param>=<val>
+Params: can                 Configure MCP251xFD CAN controller
+                            over SPI3 bus, CS0
+                            (boolean, optional)
+        uart                Configure UART2 on GPIOs 0,1
+                            (boolean, optional)
+
+Name:   iotg-rpi4-ie-b
+Info:   Compulab IOTG-RPi4 IEB extension module
+Load:   dtoverlay=iotg-rpi4-ie-b,<param>=<val>
+Params: can                 Configure MCP251xFD CAN controller
+                            over SPI4 bus, CS0
+                            (boolean, optional)
+        uart                Configure UART3 on GPIOs 4,5
+                            (boolean, optional)
+
+Name:   iotg-rpi4-ie-c
+Info:   Compulab IOTG-RPi4 IEC extension module
+Load:   dtoverlay=iotg-rpi4-ie-c,<param>=<val>
+Params: can                 Configure MCP251xFD CAN controller
+                            over SPI0 bus, CS0
+                            (boolean, optional)
+        uart                Configure UART4 on GPIOs 8,9
+                            (boolean, optional)
+
+Name:   iotg-rpi4-ie-d
+Info:   Compulab IOTG-RPi4 IED extension module
+Load:   dtoverlay=iotg-rpi4-ie-d,<param>=<val>
+Params: can                 Configure MCP251xFD CAN controller
+                            over SPI1 bus, CS0
+                            (boolean, optional)
+        uart                Configure UART5 on GPIOs 12,13
+                            (boolean, optional)