PHYTEC
Page 33
[...]
&i2c2 {
clock-frequency = <400000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c2>;
pinctrl-1 = <&pinctrl_i2c2_gpio>;
sda-gpios = <&gpio5 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
scl-gpios = <&gpio5 16 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
[...]
};
[...]
&iomuxc {
[...]
pinctrl_i2c2: i2c2grp {
fsl,pins = <
MX8MP_IOMUXC_I2C2_SCL__I2C2_SCL 0x400001c3
MX8MP_IOMUXC_I2C2_SDA__I2C2_SDA 0x400001c3
>;
};
pinctrl_i2c2_gpio: i2c2grp_gpio {
fsl,pins = <
MX8MP_IOMUXC_I2C2_SCL__GPIO5_IO16 0x1e3
MX8MP_IOMUXC_I2C2_SDA__GPIO5_IO17 0x1e3
>;
};
[...]
};
EEPROM
phyCORE-i.MX8MP has a i2c EEPROM populated connected to the i2c1 bus.
It is possible to read and write directly to the device:
cat /sys/class/i2c-dev/i2c-0/device/0-0051/eeprom
To read and print the first 1024 bytes of the EEPROM as a hex number, execute:
target$ dd if=/sys/class/i2c-dev/i2c-0/device/0-0051/eeprom bs=1 count=1024 | od -x
To fill the whole EEPROM with zeros, use:
target$ dd if=/dev/zero of=/sys/class/i2c-dev/i2c-0/device/0-0051/eeprom bs=4096 count=1
DT representation, e.g. in phyCORE-i.MX 8M Plus file
:
imx8mp-phycore-som.dtsi
