Sorry, I've not checked pimoroni overlay! link to the sources of the official kernel tree was provided here posting.php?mode=reply&t=370976&sid=179 ... #pr2223044
As I don't have such a display on hands I've used another I2C slave connected to the SW-I2C interface configured on GPIO10/11, configured the bus with below fragments in the overlay:
this gives me the SW I2C-bus as I2C-22 (what I was expecting to see on my CM4 DUT).
From my current understanding SW I2C bus numbers will start from numbers >21 as 21 is DDC1 on (everything) <Pi4
As I don't have such a display on hands I've used another I2C slave connected to the SW-I2C interface configured on GPIO10/11, configured the bus with below fragments in the overlay:
Code:
fragment@0 {target-path = "/";__overlay__ {i2c_gpio: i2c@0 {reg = <0xffffffff>;compatible = "i2c-gpio";gpios = <&gpio 10 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) /* sda */ &gpio 11 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) /* scl */>;i2c-gpio,delay-us = <2>; /* ~100 kHz */#address-cells = <1>;#size-cells = <0>;};};};fragment@1 {target-path = "/aliases";__overlay__ {i2c_gpio = "/i2c@0";};};fragment@2 {target-path = "/__symbols__";__overlay__ {i2c_gpio = "/i2c@0";};};Code:
pi@raspberrypi:~ $ i2cdetect -li2c-20i2c fef04500.i2c I2C adapteri2c-21i2c fef09500.i2c I2C adapteri2c-22i2c ffffffff00000001.i2c I2C adapterpi@raspberrypi:~ $ sudo i2cdetect -y 22 0 1 2 3 4 5 6 7 8 9 a b c d e f00: -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- 63 -- -- -- -- 68 -- -- 6b -- -- -- -- 70: -- -- -- -- -- -- -- -- Statistics: Posted by aBUGSworstnightmare — Wed May 22, 2024 6:27 am