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 overlay:
to my config.txt below was added:this gives me the SW I2C-bus as I2C-22 (what I was expecting to see on my CM4 DUT).
with another slave deviceFrom my current understanding SW I2C bus numbers will start from numbers >21 as 21 is DDC1 on (everything) <Pi4 as - with no bus number predefined - results is--> please post the content of your config.txt!
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 overlay:
Code:
// Overlay for i2c_gpio bitbanging host bus - pull-ups enabled/dts-v1/;/plugin/;#include <dt-bindings/gpio/gpio.h>/ {compatible = "brcm,bcm2835";fragment@0 {target-path = "/";__overlay__ {i2c_gpio: i2c@0 {reg = <0xffffffff>;compatible = "i2c-gpio";gpios = <&gpio 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN|GPIO_PULL_UP) /* sda */ &gpio 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN|GPIO_PULL_UP) /* 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";};};__overrides__ {i2c_gpio_sda = <&i2c_gpio>,"gpios:4";i2c_gpio_scl = <&i2c_gpio>,"gpios:16";i2c_gpio_delay_us = <&i2c_gpio>,"i2c-gpio,delay-us:0";bus = <&i2c_gpio>, "reg:0";};};Code:
dtoverlay=i2c-gpio,bus=22,i2c_gpio_sda=10,i2c_gpio_scl=11Code:
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: -- -- -- -- -- -- -- -- Code:
pi@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: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: 70 -- -- -- -- -- -- -- pi@raspberrypi:~ $ i2cdetect -li2c-20i2c fef04500.i2c I2C adapteri2c-21i2c fef09500.i2c I2C adapteri2c-22i2c 1600000002.i2c I2C adapterpi@raspberrypi:~ $ Code:
dtoverlay=i2c-gpio,i2c_gpio_sda=10,i2c_gpio_scl=11Code:
pi@raspberrypi:~ $ i2cdetect -li2c-20i2c fef04500.i2c I2C adapteri2c-21i2c fef09500.i2c I2C adapteri2c-22i2c ffffffff00000002.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: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: 70 -- -- -- -- -- -- -- pi@raspberrypi:~ $ Statistics: Posted by aBUGSworstnightmare — Wed May 22, 2024 6:27 am