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error at PMIC I2C
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2024-01-08 03:23 AM
We have set PB7 and PE15 for I2c4 communication for PMIC in op-tee stm32mp135f-dk.dts.
but we keep getting pmic error like this -
I/TC: Embedded DTB found
I/TC: OP-TEE version: Unknown_3.19 (gcc version 12.2.0 (GCC)) #23 Mon Jan 8 10:50:26 UTC 2024 arm
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: WARNING: All debug access are allowed
E/TC:0 0 Panic at core/arch/arm/plat-stm32mp1/drivers/stm32mp1_pmic.c:183 <initialize_pmic_i2c>
E/TC:0 0 TEE load address @ 0xde000000
E/TC:0 0 Call stack:
E/TC:0 0 0xde0030f9
E/TC:0 0 0xde0193a7
E/TC:0 0 0xde006735
E/TC:0 0 0xde017fb9
E/TC:0 0 0xde018089
E/TC:0 0 0xde018773
E/TC:0 0 0xde01a095
E/TC:0 0 0xde002fbb
E/TC:0 0 0xde00019c
Labels:
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STM32 Security
4 REPLIES 4
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2024-02-01 11:25 PM
I have the exact same issue with PB7 and PE15. Have you been able to solve this issue?
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2024-02-12 08:07 PM
Here is the PMIC and power related DeviceTree parts that works for me.
optee-os dts:
(Use this part same in tf-a dts file.)
/ { /* root */
vin: vin {
compatible = "regulator-fixed";
regulator-name = "vin";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-always-on;
};
v3v3_ao: v3v3_ao {
compatible = "regulator-fixed";
regulator-name = "v3v3_ao";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
};Check that under &etzpc node you have I2C4 secured
DECPROT(STM32MP1_ETZPC_I2C4_ID, DECPROT_S_RW, DECPROT_UNLOCK)
(Use this part (i2c4 node) same in tf-a dts file.)
&i2c4{
pinctrl-names = "default";
pinctrl-0 = <&i2c4_pins_mx>;
status = "okay";
/* USER CODE BEGIN i2c4 */
clock-frequency = <400000>;
i2c-scl-rising-time-ns = <185>;
i2c-scl-falling-time-ns = <20>;
pmic: stpmic@33 {
compatible = "st,stpmic1";
reg = <0x33>;
status = "okay";
st,wakeup-pin-number = <1>;
st,notif-it-id = <0>;
wakeup-source;
regulators {
compatible = "st,stpmic1-regulators";
buck1-supply = <&vin>;
buck2-supply = <&vin>;
buck3-supply = <&vin>;
buck4-supply = <&vin>;
ldo1-supply = <&vin>;
ldo4-supply = <&vin>;
ldo5-supply = <&vin>;
ldo6-supply = <&vin>;
vref_ddr-supply = <&vin>;
pwr_sw1-supply = <&bst_out>;
pwr_sw2-supply = <&v3v3_ao>;
vddcpu: buck1 {
regulator-name = "vddcpu";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-over-current-protection;
lp-stop {
regulator-suspend-microvolt = <1250000>;
};
lplv-stop {
regulator-suspend-microvolt = <900000>;
};
lplv-stop2 {
regulator-off-in-suspend;
};
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
vdd_ddr: buck2 {
regulator-name = "vdd_ddr";
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-over-current-protection;
standby-ddr-off {
regulator-off-in-suspend;
};
};
vdd: buck3 {
regulator-name = "vdd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
st,mask-reset;
regulator-over-current-protection;
};
vddcore: buck4 {
regulator-name = "vddcore";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1250000>;
regulator-always-on;
regulator-over-current-protection;
lplv-stop {
regulator-suspend-microvolt = <900000>;
};
lplv-stop2 {
regulator-suspend-microvolt = <900000>;
};
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
vdd_adc: ldo1 {
regulator-name = "vdd_adc";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
unused1: ldo2 {
regulator-name = "ldo2";
};
unused2: ldo3 {
regulator-name = "ldo3";
};
vdd_usb: ldo4 {
regulator-name = "vdd_usb";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
vdd_sd: ldo5 {
regulator-name = "vdd_sd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
v1v8_periph: ldo6 {
regulator-name = "v1v8_periph";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
vref_ddr: vref_ddr {
regulator-name = "vref_ddr";
regulator-always-on;
standby-ddr-sr {
regulator-off-in-suspend;
};
standby-ddr-off {
regulator-off-in-suspend;
};
};
bst_out: boost {
regulator-name = "bst_out";
};
v3v3_sw: pwr_sw2 {
regulator-name = "v3v3_sw";
regulator-active-discharge = <1>;
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
};
};
/* USER CODE END i2c4 */
};I also have this node added but I don't think you need it to PMIC work:
&pwr_regulators{
status = "okay";
/* USER CODE BEGIN pwr_regulators */
system_suspend_supported_soc_modes = <
STM32_PM_CSLEEP_RUN
STM32_PM_CSTOP_ALLOW_LP_STOP
STM32_PM_CSTOP_ALLOW_LPLV_STOP
STM32_PM_CSTOP_ALLOW_LPLV_STOP2
STM32_PM_CSTOP_ALLOW_STANDBY_DDR_SR
>;
system_off_soc_mode = <STM32_PM_SHUTDOWN>;
vdd-supply = <&vdd>;
vdd_3v3_usbfs-supply = <&vdd_usb>;
/* USER CODE END pwr_regulators */
};and make sure you have secured you I2C4 pins. For me:
&gpiob {
st,protreg = < (TZPROT(9)|TZPROT(13)) >;
};but for you it shoud be something like this:
&gpiob { /* PB7 */
st, protreg = < (TZPROT(7))>;
};
&gpioe { /* PE15 */
st, protreg = < (TZPROT(15))>;
};/* Add this part also under the u-boot and kernel dts file /*
&scmi_regu {
scmi_vddcpu: voltd-vddcpu {
reg = <VOLTD_SCMI_STPMIC1_BUCK1>;
voltd-supply = <&vddcpu>;
};
scmi_vdd: voltd-vdd {
reg = <VOLTD_SCMI_STPMIC1_BUCK3>;
voltd-supply = <&vdd>;
};
scmi_vddcore: voltd-vddcore {
reg = <VOLTD_SCMI_STPMIC1_BUCK4>;
voltd-supply = <&vddcore>;
};
scmi_vdd_adc: voltd-vdd_adc {
reg = <VOLTD_SCMI_STPMIC1_LDO1>;
voltd-supply = <&vdd_adc>;
};
scmi_vdd_usb: voltd-vdd_usb {
reg = <VOLTD_SCMI_STPMIC1_LDO4>;
voltd-supply = <&vdd_usb>;
};
scmi_vdd_sd: voltd-vdd_sd {
reg = <VOLTD_SCMI_STPMIC1_LDO5>;
voltd-supply = <&vdd_sd>;
};
scmi_v1v8_periph: voltd-v1v8_periph {
reg = <VOLTD_SCMI_STPMIC1_LDO6>;
voltd-supply = <&v1v8_periph>;
};
scmi_v3v3_sw: voltd-v3v3_sw {
reg = <VOLTD_SCMI_STPMIC1_PWR_SW2>;
voltd-supply = <&v3v3_sw>;
};
};
I hope it would solve your problem with PMIC.
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2024-02-26 05:46 PM
@manishee and @arifbalik did you guys solved your issues?
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2024-06-11 11:18 PM
Yes, it turns out the pin should be inside the secure context. Changing this solved the issue for me
&gpiob{
st,protreg = < (TZPROT(9) | TZPROT(7)) >;
};
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