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USB TF-A build stuck on ASSERT: drivers/st/regulator/regulator_fixed.c:81
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2025-11-21 6:58 AM
Hello,
I have made a custom STM32MP133D board and I am in the process of building the custom bring up. The bringup uses discrete regulators and not a pmic. I have followed the process of building the device tree for the TF-A and build the TF-A .stm32 binary configured for USB. The .stm32 successfully flashes but the code stucks on ASSERT: drivers/st/regulator/regulator_fixed.c:81 and Exception mode=0x00000016 at: 0x00000000 suggesting a null pointer and an underline issue with my dts.
I have made the ddr memory tests for the pcb bring up and successfully passes all the memory tests using the tfa.dtsi ddr configuration.
I have also attached the the device tree for the tfa.
Can anyone help me with this issue?
// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
/*
* Copyright (C) 2025, STMicroelectronics - All Rights Reserved
* Author: STM32CubeMX code generation for STMicroelectronics.
*/
/* For more information on Device Tree configuration, please refer to
* https://wiki.st.com/stm32mpu/wiki/Category:Device_tree_configuration
*/
/dts-v1/;
#include <dt-bindings/pinctrl/stm32-pinfunc.h>
#include <dt-bindings/clock/stm32mp13-clksrc.h>
#include "stm32mp13-mx.dtsi"
#include "stm32mp133.dtsi"
#include "stm32mp13-ddr.dtsi"
/* USER CODE BEGIN includes */
/* USER CODE END includes */
/ {
model = "STMicroelectronics custom STM32CubeMX board - openstlinux-6.1-yocto-mickledore-mpu-v24.06.26";
compatible = "st,stm32mp133d-thingscore-1-mx", "st,stm32mp133";
memory@c0000000 {
device_type = "memory";
reg = <0xc0000000 0x20000000>;
/* USER CODE BEGIN memory */
/* USER CODE END memory */
};
/* USER CODE BEGIN root */
aliases {
serial0 = &uart4;
};
chosen {
stdout-path = "serial0:115200n8";
};
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;
};
vdd: vdd {
compatible = "regulator-fixed";
regulator-name = "vdd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
vdd_sd: vdd_sd {
compatible = "regulator-fixed";
regulator-name = "vdd_sd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
};
vdd_cpu: vddcpu {
compatible = "regulator-fixed";
regulator-name = "vdd_cpu";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1250000>;
regulator-always-on;
};
vdd_core: vddcore {
compatible = "regulator-fixed";
regulator-name = "vdd_core";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1250000>;
regulator-always-on;
};
vdd_ddr: vdd_ddr {
compatible = "regulator-fixed";
regulator-name = "vdd_ddr";
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
};
vref_ddr: vref_ddr {
compatible = "regulator-fixed";
regulator-name = "vref_ddr";
regulator-min-microvolt = <675000>; /* 0.5 * VDD_DDR */
regulator-max-microvolt = <675000>;
regulator-always-on;
};
vtt_ddr: vref_ddr {
regulator-name = "vtt_ddr";
regulator-over-current-protection;
st,regulator-sink-source;
};
vdd_usb: vdd_usb {
compatible = "regulator-fixed";
regulator-name = "vdd_usb";
regulator-min-microvolt = <3300000>; /* 0.5 * VDD_DDR */
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
/* USER CODE END root */
clocks {
/* USER CODE BEGIN clocks */
/* USER CODE END clocks */
clk_hsi: clk-hsi {
clock-frequency = <64000000>;
/* USER CODE BEGIN clk_hsi */
/* USER CODE END clk_hsi */
};
clk_lse: clk-lse {
clock-frequency = <32768>;
st,drive = < LSEDRV_MEDIUM_HIGH >;
/* USER CODE BEGIN clk_lse */
/* USER CODE END clk_lse */
};
clk_hse: clk-hse {
clock-frequency = <24000000>;
/* USER CODE BEGIN clk_hse */
/* USER CODE END clk_hse */
};
clk_i2sin: clk-i2sin {
status = "disabled";
/* USER CODE BEGIN clk_i2sin */
/* USER CODE END clk_i2sin */
};
};
}; /*root*/
&pinctrl {
quadspi_pins_mx: quadspi_mx-0 {
pins1 {
pinmux = <STM32_PINMUX('D', 1, AF9)>, /* QUADSPI_BK1_NCS */
<STM32_PINMUX('D', 5, AF9)>, /* QUADSPI_BK1_IO0 */
<STM32_PINMUX('D', 11, AF9)>, /* QUADSPI_BK1_IO2 */
<STM32_PINMUX('D', 15, AF9)>, /* QUADSPI_BK1_IO3 */
<STM32_PINMUX('E', 9, AF9)>; /* QUADSPI_BK1_IO1 */
bias-disable;
drive-push-pull;
slew-rate = <1>;
};
pins2 {
pinmux = <STM32_PINMUX('D', 4, AF9)>; /* QUADSPI_CLK */
bias-disable;
drive-push-pull;
slew-rate = <2>;
};
};
sdmmc2_pins_mx: sdmmc2_mx-0 {
pins1 {
pinmux = <STM32_PINMUX('B', 3, AF10)>, /* SDMMC2_D2 */
<STM32_PINMUX('B', 4, AF10)>, /* SDMMC2_D3 */
<STM32_PINMUX('B', 14, AF10)>, /* SDMMC2_D0 */
<STM32_PINMUX('B', 15, AF10)>, /* SDMMC2_D1 */
<STM32_PINMUX('G', 6, AF10)>; /* SDMMC2_CMD */
bias-disable;
drive-push-pull;
slew-rate = <1>;
};
pins2 {
pinmux = <STM32_PINMUX('E', 3, AF10)>; /* SDMMC2_CK */
bias-disable;
drive-push-pull;
slew-rate = <3>;
};
};
uart4_pins_mx: uart4_mx-0 {
pins1 {
pinmux = <STM32_PINMUX('A', 9, AF8)>; /* UART4_TX */
bias-disable;
drive-push-pull;
slew-rate = <0>;
};
pins2 {
pinmux = <STM32_PINMUX('H', 14, AF8)>; /* UART4_RX */
bias-disable;
};
};
/* USER CODE BEGIN pinctrl */
/* USER CODE END pinctrl */
};
&bsec{
status = "okay";
/* USER CODE BEGIN bsec */
board_id:board_id@f0{
reg = <0xf0 0x4>;
st,non-secure-otp;
};
/* USER CODE END bsec */
};
&hash{
status = "okay";
/* USER CODE BEGIN hash */
/* USER CODE END hash */
};
&pwr_regulators{
status = "okay";
/* USER CODE BEGIN pwr_regulators */
vdd-supply = <&vdd>;
// vdd_3v3_usbfs-supply = <&vdd_usb>;
/* USER CODE END pwr_regulators */
};
&qspi{
pinctrl-names = "default";
pinctrl-0 = <&quadspi_pins_mx>;
status = "okay";
/* USER CODE BEGIN qspi */
flash0: flash@0 {
compatible = "winbond,w25q256jvq", "jedec,spi-nor";
reg = <0>; /* chip select 0 */
spi-max-frequency = <80000000>; /* 80 MHz */
spi-rx-bus-width = <4>; /* Quad-SPI */
spi-tx-bus-width = <4>;
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "tf-a";
reg = <0x00000000 0x00040000>; /* 256 KB */
};
partition@40000 {
label = "fip";
reg = <0x00040000 0x00200000>; /* 2 MB */
};
partition@300000 {
label = "kernel";
reg = <0x00300000 0x00500000>; /* 5 MB */
};
partition@800000 {
label = "rootfs";
reg = <0x00800000 0x01800000>; /* rest of flash (~24 MB) */
};
};
/* USER CODE END qspi */
};
&rcc{
status = "okay";
/* USER CODE BEGIN rcc */
/* USER CODE END rcc */
st,clksrc=<
CLK_MPU_PLL1P
CLK_AXI_PLL2P
CLK_MLAHBS_HSI
CLK_CKPER_DISABLED
CLK_QSPI_ACLK
CLK_SDMMC2_HCLK6
CLK_STGEN_HSI
CLK_UART4_HSI
CLK_RNG1_CSI
>;
st,clkdiv = <
DIV(DIV_MPU, 1)
DIV(DIV_AXI, 0)
DIV(DIV_MLAHB, 0)
DIV(DIV_APB1, 0)
DIV(DIV_APB2, 0)
DIV(DIV_APB3, 0)
DIV(DIV_APB4, 1)
DIV(DIV_APB5, 2)
DIV(DIV_APB6, 0)
>;
st,pll_vco {
pll1_vco_1300Mhz: pll1-vco-1300Mhz {
src=< CLK_PLL12_HSE >;
divmn = < 2 80 >;
frac = < 0x800 >;
};
pll2_vco_800Mhz: pll2-vco-800Mhz {
src=< CLK_PLL12_HSE >;
divmn = < 2 49 >;
};
/* USER CODE BEGIN rcc_st-pll_vco */
/* USER CODE END rcc_st-pll_vco */
};
pll1:st,pll@0 {
compatible = "st,stm32mp1-pll";
reg = <0>;
st,pll = < &pll1_cfg1 >;
pll1_cfg1: pll1_cfg1 {
st,pll_vco = < &pll1_vco_1300Mhz >;
st,pll_div_pqr = < 0 1 1 >;
};
/* USER CODE BEGIN pll1 */
/* USER CODE END pll1 */
};
pll2:st,pll@1 {
compatible = "st,stm32mp1-pll";
reg = <1>;
st,pll = < &pll2_cfg1 >;
pll2_cfg1: pll2_cfg1 {
st,pll_vco = < &pll2_vco_800Mhz >;
st,pll_div_pqr = < 1 1 0 >;
};
/* USER CODE BEGIN pll2 */
/* USER CODE END pll2 */
};
};
&rng{
status = "okay";
/* USER CODE BEGIN rng */
/* USER CODE END rng */
};
&sdmmc2{
pinctrl-names = "default";
pinctrl-0 = <&sdmmc2_pins_mx>;
status = "okay";
/* USER CODE BEGIN sdmmc2 */
disable-wp;
st,neg-edge;
bus-width = <4>;
vmmc-supply = <&vdd_sd>;
/* USER CODE END sdmmc2 */
};
&uart4{
pinctrl-names = "default";
pinctrl-0 = <&uart4_pins_mx>;
status = "okay";
/* USER CODE BEGIN uart4 */
/* USER CODE END uart4 */
};
/* USER CODE BEGIN addons */
&cpu0 {
cpu-supply = <&vdd_cpu>;
};
/* USER CODE END addons */-------After flashing using usb
NOTICE: CPU: STM32MP133D Rev.Y
NOTICE: Model: STMicroelectronics custom STM32CubeMX board - openstlinux-6.1-yocto-mickledore-mpu-v24.06.26
ASSERT: drivers/st/regulator/regulator_fixed.c:81
Exception mode=0x00000016 at: 0x00000000
Labels:
- Labels:
-
OpenSTLinux
-
STM32MP13 Lines
-
TF-A
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