topic Re: imx93evk /dev/ttyLP4 is not created for Bluetooth in i.MX Processors

imx93evk /dev/ttyLP4 is not created for Bluetooth

Chihyu_Lin — Thu, 28 Sep 2023 12:53:47 GMT

IMX93EVK default setting with iw612 UART Bluetooth using lpuart5, but /dev/ttyLP4 was not enable.

[ 0.000000] Kernel command line: console=ttyLP0,115200 earlycon root=/dev/mmcblk0p2 rootwait rw
[ 0.870871] 44380000.serial: ttyLP0 at MMIO 0x44380010 (irq = 18, base_baud = 1500000) is a FSL_LPUART
[ 0.880228] printk: console [ttyLP0] enabled
[ 0.905456] 42590000.serial: ttyLP4 at MMIO 0x42590010 (irq = 19, base_baud = 1500000) is a FSL_LPUART
[ 0.914849] serial serial0: tty port ttyLP4 registered

Re: imx93evk /dev/ttyLP4 is not created for Bluetooth

brian14 — Mon, 02 Oct 2023 20:46:46 GMT

Hi @Chihyu_Lin,

Could you please tell me your BSP version?

Also, I suggest using the iMX Linux User's Guide of your BSP version and use the commands provided in the section Connectivity to effectively use the Bluetooth driver.

Here is a link to iMX Linux User's Guide from our latest BSP release: i.MX Linux User's Guide (nxp.com)

Have a great day!

Re: imx93evk /dev/ttyLP4 is not created for Bluetooth

Chihyu_Lin — Fri, 06 Oct 2023 02:24:38 GMT

Thanks for your reply, I had found a document about new kernel BT UART setting. The problem is solved.

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Bluetooth-NXP-UART-Driver-Linux-BSP-6-1-22-btnxpuart/ta-p/1708588