Why USART 2 failed to initialize when Linux started？

[Yji.1]

board: stm32mp157a-dk1

device-tree:

pinctrl{

usart2_pins_b: usart2-0 {

pins1 {

pinmux = <STM32_PINMUX('F', 5, AF7)>; /* USART2_TX */

bias-disable;

drive-push-pull;

slew-rate = <0>;

};

pins2 {

pinmux = <STM32_PINMUX('F', 4, AF7)>; /* USART2_RX */

bias-disable;

};

};

usart2_idle_pins_b: usart2-idle-0 {

pins1 {

pinmux = <STM32_PINMUX('F', 5, ANALOG)>; /* USART2_TX */

};

pins2 {

pinmux = <STM32_PINMUX('F', 4, AF7)>; /* USART2_RX */

bias-disable;

};

};

usart2_sleep_pins_b: usart2-sleep-0 {

pins {

pinmux = <STM32_PINMUX('F', 5, ANALOG)>, /* USART2_TX */

<STM32_PINMUX('F', 4, ANALOG)>; /* USART2_RX */ };

};

};

&usart2 {

pinctrl-names = "default", "sleep", "idle";

pinctrl-0 = <&usart2_pins_b>;

pinctrl-1 = <&usart2_sleep_pins_b>;

pinctrl-2 = <&usart2_idle_pins_b>;

status = "okay";

};

error info:

[  0.574170] STM32 USART driver initialized

[  0.574825] stm32-usart 4000e000.serial: failed to get alias id, errno -19

[  0.576148] 40010000.serial: ttySTM0 at MMIO 0x40010000 (irq = 27, base_baud = 4000000) is a stm32-usart

[  1.404594] console [ttySTM0] enabled

[  1.408934] stm32-usart 40010000.serial: interrupt mode used for rx (no dma)

[  1.415351] stm32-usart 40010000.serial: interrupt mode used for tx (no dma)

please give me some.

[Yji.1]

linux kernel：​

Linux buildroot 4.19.26-rt16 #1 SMP PREEMPT RT Sat Apr 11 09:24:16 CST 2020 armv7l GNU/Linux

[Yji.1]

I finish it.

I miss to config aliases.

aliases {

ethernet0 = &ethernet0;

serial0 = &uart4;

serial1 = &usart2;

serial2 = &uart7;

};

serial1 = &usart2, it's ok.