Hii,
I am using STPMIC25A with STM32mp257FAK3 with DDR3L in one custom design and LPDDR4 in second custom design.
I am able to change o/p of Buck 4, Buck 6 and LDO 3 as per the requirement by changing the voltage for the same in the device tree, under fdts in Arm Trusted Firmware. I am sharing the node below:
&i2c7 {
pinctrl-names = "default";
pinctrl-0 = <&i2c7_pins_a>;
i2c-scl-rising-time-ns = <185>;
i2c-scl-falling-time-ns = <20>;
clock-frequency = <400000>;
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
pmic2: stpmic@33 {
compatible = "st,stpmic2";
reg = <0x33>;
status = "okay";
regulators {
compatible = "st,stpmic2-regulators";
vddcpu: buck1 {
regulator-name = "vddcpu";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <910000>;
regulator-always-on;
};
vddcore: buck2 {
regulator-name = "vddcore";
regulator-min-microvolt = <820000>;
regulator-max-microvolt = <820000>;
regulator-always-on;
};
vddgpu: buck3 {
regulator-name = "vddgpu";
regulator-min-microvolt = <800000>;
regulator-max-microvolt = <900000>;
regulator-always-on;
};
vddio_pmic: buck4 {
regulator-name = "vddio_pmic";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
v1v8: buck5 {
regulator-name = "v1v8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};
vdd2_ddr: buck6 {
regulator-name = "vdd2_ddr";
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
};
v3v3: buck7 {
regulator-name = "v3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
vdda1v8_aon: ldo1 {
regulator-name = "vdda1v8_aon";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};
vdd_emmc: ldo2 {
regulator-name = "vdd_emmc";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
vdd1_ddr: ldo3 {
regulator-name = "vdd1_ddr";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};
vdd3v3_usb: ldo4 {
regulator-name = "vdd3v3_usb";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
v5v_hdmi: ldo5 {
regulator-name = "v5v_hdmi";
regulator-min-microvolt = <2000000>;
regulator-max-microvolt = <2000000>;
};
vdd_sdcard: ldo7 {
regulator-name = "vdd_sdcard";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
vddio_sdcard: ldo8 {
regulator-name = "vddio_sdcard";
st,regulator-bypass-microvolt = <3300000>;
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
};
};
};
Please confirm are there any other changes required for proper operation.
