The power supply part of the board I made myself did not use "stpmic", but used a discrete power supply. I encountered an issue when porting OpenSTLinux (5.1.0). After modifying the power supply in the "u boot" device tree and using "STM32CubeProgrammer" to download, it kept downloading repeatedly, as shown in the following figure:
I have modified these positions: under "i2c4", the "pmic: stpmic@33 All nodes have been deleted, and the following content has been added to the root node:
vddcore: regulator-vddcore {
compatible = "regulator-fixed";
regulator-name = "vddcore";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-boot-on;
};
v3v3: regulator-3p3v {
compatible = "regulator-fixed";
regulator-name = "v3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
regulator-boot-on;
};
v1v8_audio: regulator-v1v8-audio {
compatible = "regulator-fixed";
regulator-name = "v1v8_audio";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
regulator-boot-on;
};
vdd: regulator-vdd {
compatible = "regulator-fixed";
regulator-name = "vdd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
regulator-boot-on;
};
vdd_usb: regulator-vdd-usb {
compatible = "regulator-fixed";
regulator-name = "vdd_usb";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
regulator-boot-on;
};
