2378927_en-US

[#1]

IMX8M+ w/ BT+WiFi module (AW-XB583MA-PUR) BT takes 50-60 seconds time to get initialized

Dear NXP team,

We have iMx8M+ based custom board and using BT & WiFi ( module AW-XB583MA-PUR from Azurawave) over PCIe and UART respectively.

We are facing issue while BT initializing which takes around 50-60 seconds (fixed duration always) to get response on 1st HCI reset command over UART. We checked/debugged it with Azurawave team and they suggested also to check w/ NXP (as it seems to them) that this might be NXP side issue.

Below are the SoC connections to module:

NXP: UART1_RXD <---> Module: UART TXD
NXP: UART1_TXD <---> Module: UART RXD
NXP: UART3_TXD <---> Module: UART RTS
NXP: UART3_RXD <---> Module: UART CTS

Device tree changes we did:

&uart1 { /* BT */
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;*/
status = "okay";
};


pinctrl_uart1: uart1grp {
fsl,pins = <
MX8MP_IOMUXC_UART1_RXD__UART1_DCE_RX 0x140
MX8MP_IOMUXC_UART1_TXD__UART1_DCE_TX 0x140
MX8MP_IOMUXC_UART3_RXD__UART1_DCE_CTS 0x140
MX8MP_IOMUXC_UART3_TXD__UART1_DCE_RTS 0x140
>;
};

i.MX 8M | i.MX 8M Mini | i.MX 8M NanoLinuxRe: IMX8M+ w/ BT+WiFi module (AW-XB583MA-PUR) BT takes 50-60 seconds time to get initialized

Hello @hiteshviradiya 

Hope you are doing very well.

Could you please share details on device tree? I just can see the Pinmux code.

Also, details about the BSP version you are using and the driver used to connect to the WIFI module.

Best regards,

Salas.

Re: IMX8M+ w/ BT+WiFi module (AW-XB583MA-PUR) BT takes 50-60 seconds time to get initialized

Dear @Manuel_Salas,

We are using customized buildroot (version 2024.08) w/ Kernel version: 6.6.36. I already shared BT related device tree code along with Pinmux but sharing it again as below:

&uart1 { /* BT */
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;
status = "okay";
};

pinctrl_uart1: uart1grp {
fsl,pins = <
MX8MP_IOMUXC_UART1_RXD__UART1_DCE_RX 0x140
MX8MP_IOMUXC_UART1_TXD__UART1_DCE_TX 0x140
MX8MP_IOMUXC_UART3_RXD__UART1_DCE_CTS 0x140
MX8MP_IOMUXC_UART3_TXD__UART1_DCE_RTS 0x140
>;
};

Let me know if you want any other specific device tree node.