Question
Activating UART3 for Linux not possible. Are there any hints for me, where to look?
Hi Folks,
i created a custom dts and build it via the mx-addons howto. My goal is to activate USART3 on DK2.
For USART3 is create the following source in the DT:
&usart3{
pinctrl-names = "default", "sleep", "idle";
pinctrl-0 = <&usart3_pins_a>;
pinctrl-1 = <&usart3_sleep_pins_a>;
pinctrl-2 = <&usart3_idle_pins_a>
status = "okay";
/* USER CODE BEGIN usart3 */
/* USER CODE END usart3 */
};
usart3_pins_mx: usart3_mx-0 {
u-boot,dm-pre-reloc;
pins1 {
u-boot,dm-pre-reloc;
pinmux = <STM32_PINMUX('B', 10, AF7)>, /* USART3_TX */
<STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */
bias-disable;
drive-push-pull;
slew-rate = <0>;
};
pins2 {
u-boot,dm-pre-reloc;
pinmux = <STM32_PINMUX('B', 12, AF8)>, /* USART3_RX */
<STM32_PINMUX('B', 13, AF7)>; /* USART3_CTS */
bias-disable;
};
};
usart3_sleep_pins_mx: usart3_sleep_mx-0 {
u-boot,dm-pre-reloc;
pins {
u-boot,dm-pre-reloc;
pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
<STM32_PINMUX('B', 12, ANALOG)>, /* USART3_RX */
<STM32_PINMUX('B', 13, ANALOG)>, /* USART3_CTS */
<STM32_PINMUX('G', 8, ANALOG)>; /* USART3_RTS */
};
};
/* USER CODE BEGIN pinctrl */
/* USER CODE END pinctrl */
};And i get in the bootmessage:
[ 0.430813] stm32-dma 48000000.dma: STM32 DMA driver registered
[ 0.432952] stm32-dma 48001000.dma: STM32 DMA driver registered
[ 0.514748] STM32 USART driver initialized
[ 0.516149] stm32-usart 4000e000.serial: Linked as a consumer to 48000000.dma
[ 0.516515] 4000e000.serial: ttySTM3 at MMIO 0x4000e000 (irq = 24, base_baud = 4000000) is a stm32-usart
[ 0.516810] serial serial0: tty port ttySTM3 registered
[ 0.516877] genirq: irq_chip stm32-exti-h did not update eff. affinity mask of irq 72
[ 0.517785] stm32-usart: probe of 4000f000.serial failed with error -22
[ 0.518837] stm32-usart 40010000.serial: interrupt mode used for rx (no dma)
[ 0.518863] stm32-usart 40010000.serial: interrupt mode used for tx (no dma)
[ 0.518892] 40010000.serial: ttySTM0 at MMIO 0x40010000 (irq = 26, base_baud = 4000000) is a stm32-usart
[ 1.463868] console [ttySTM0] enabledThe USART3 is at 400f000 so i get these error 22.
Does any one has any hints for me where to look?
Best regards and thanks,
Niklas