Open shubham9436 opened 1 day ago
The I2C interfaces at addresses 0xfef04500 and 0xfef09500 are dedicated to the HDMI connectors - they are the control channels, used for reading the EDID etc. You get a hint that they aren't the normal I2C interfaces from i2cdetect:
~$ i2cdetect -l
i2c-20 i2c fef04500.i2c I2C adapter
i2c-21 i2c fef09500.i2c I2C adapter
The Device Tree file gives them high bus numbers to differentiate them from the general purpose interfaces.
Describe the bug
I am trying to set the clock frequency of the i2c but unable to do so.
I have tried configuring the /boot/config.txt
When i reboot and execute the command
dmesg | grep i2c
, i get the following output onlySteps to reproduce the behaviour
I have tried configuring the /boot/config.txt
Device (s)
Raspberry Pi CM4
System
cat /etc/rpi-issue Raspberry Pi reference 2024-07-04 Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 3a42dcf411046ddac504378ad4852fcb34790218, stage2
vcgencmd version Oct 17 2024 11:34:50 Copyright (c) 2012 Broadcom version b580e2acde306434ab07a913745a21451643ff55 (clean) (release) (start)
uname -a Linux raspberrypi 6.6.56-v8+ #1805 SMP PREEMPT Tue Oct 15 20:05:09 BST 2024 aarch64 GNU/Linux
Logs
[ 1.953095] i2c_dev: i2c /dev entries driver [ 2.794760] brcmstb-i2c fef04500.i2c: @97500hz registered in polling mode [ 2.800296] brcmstb-i2c fef09500.i2c: @97500hz registered in polling mode
Additional context
No response