how to RS485 in devicetree IMX8mp

[Cyriactoms]

I am using  custom board which is designed based on imx8mp evk board having imx8mp. I need to configure rs485 for uart1 and uart3 i have created one based on my knowledge but data transfer is not happening in it. can anyone help to figureout the issue with it 

&uart1{

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_uart1>;

assigned-clocks = <&clk IMX8MP_CLK_UART1>;

assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>;

fsl,uart-has-rtscts;

linux,rs485-enabled-at-boot-time;

rs485-rts-active-low;

rs485-rx-during-tx;

rs485-rts-delay = <0 0>;

status = "okay";

};

&uart3{

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_uart3>;

assigned-clocks = <&clk IMX8MP_CLK_UART3>;

assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>;

linux,rs485-enabled-at-boot-time;

rs485-rts-active-low;

rs485-rx-during-tx;

rs485-rts-delay = <0 0>;

status = "okay";

};

pinctrl_uart1: rs485_01{

fsl,pins =<

MX8MP_IOMUXC_UART1_RXD__UART1_DCE_RX 0x00000106

MX8MP_IOMUXC_UART1_TXD__UART1_DCE_TX 0x00000106

MX8MP_IOMUXC_SD1_DATA0__UART1_DCE_RTS 0x00000106

MX8MP_IOMUXC_SD1_DATA1__UART1_DCE_CTS 0x00000106

>;

};

pinctrl_uart3: rs485_02{

fsl,pins =<

MX8MP_IOMUXC_UART3_RXD__UART3_DCE_RX 0x00000106

MX8MP_IOMUXC_UART3_TXD__UART3_DCE_TX 0x00000106

MX8MP_IOMUXC_SD1_STROBE__UART3_DTE_RTS 0x00000106

MX8MP_IOMUXC_SD1_RESET_B__UART3_DTE_CTS 0x00000106

[Manuel_Salas]

Hello @Cyriactoms 

I hope you are doing very well.

I noticed that in your UART3 configuration, you are mixing DCE and DTE modes for the TX/RX and RTS/CTS pins. This inconsistency can lead to improper signal routing. Please ensure that all pins for a UART instance use the same mode (either DCE or DTE).

Also, the rs485-rts-active-low property assumes your transceiver enables transmission when RTS is low, please be sure about it.

Several of your RTS/CTS pins are muxed from SD1 interface signals. Ensure that usdhc1 is disabled.

I hope this can helps to you.

Best regards,

Salas.

[Cyriactoms]

rs485-rts-active-low if i didnt add this function means what is the default state

[Cyriactoms]

the DTE pins i got it from config tools when i do the pinmux  ihave atteached the screenshot on it

[Cyriactoms]

Is there anyother defconfig need to be added for the rs485 to be enabled