On 2/18/2026 10:59 PM, Sébastien Szymanski wrote:
Like i.MX8 and i.MXRT, on i.MX9, the Receive RX FIFO Enable (RXFE) field in LPUART FIFO register is bit 3, so set FIFO_RXFE to 0x08 on i.MX9 too. Signed-off-by: Sébastien Szymanski <[email protected]> --- drivers/serial/serial_lpuart.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/serial/serial_lpuart.c b/drivers/serial/serial_lpuart.c index 9fdb6503085d..bbce59443388 100644 --- a/drivers/serial/serial_lpuart.c +++ b/drivers/serial/serial_lpuart.c @@ -53,7 +53,8 @@ #define FIFO_RXSIZE_MASK 0x7 #define FIFO_RXSIZE_OFF 0 #define FIFO_TXFE 0x80 -#if defined(CONFIG_ARCH_IMX8) || defined(CONFIG_ARCH_IMXRT) +#if defined(CONFIG_ARCH_IMX8) || defined (CONFIG_ARCH_IMX9) || \ + defined(CONFIG_ARCH_IMXRT) #define FIFO_RXFE 0x08 #else #define FIFO_RXFE 0x40
Previous value 0x40 is wrong for all platforms. You can directly change it to 0x08 and remove all ARCH marcos.
Best regards, Ye Li
