[PATCH] IXP425: Changing serial port initialization sequence
On my IXP425 board (Janz emPC-A400), the first few characters of the u-boot startup message were missing.
I fixed it by enabling the UART before all other initialization.
I also enabled (and flushed) the FIFO of the UART.
The patch is against "latest" u-boot git-repository
Please (still) be patient if style of submission or patches are offending.
Signed-off-by: Stefan Althoefer stefan.althoefer@web.de ----
diff -uprN u-boot-orig//cpu/ixp/serial.c u-boot/cpu/ixp/serial.c --- u-boot-orig//cpu/ixp/serial.c 2008-12-02 17:25:31.000000000 +0100 +++ u-boot/cpu/ixp/serial.c 2008-12-02 22:46:27.000000000 +0100 @@ -50,8 +50,10 @@ void serial_setbrg (void) else hang ();
- IER(uart) = 0; /* Disable for now */ - FCR(uart) = 0; /* No fifos enabled */ + IER(uart) = IER_UUE; + + /* Enable an clear FIFOs */ + FCR(uart) = FCR_RESETTF | FCR_RESETRF | FCR_TRFIFOE;
/* set baud rate */ LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; @@ -63,7 +65,6 @@ void serial_setbrg (void) #else MCR(uart) = 0; /* set RTS inactive */ #endif - IER(uart) = IER_UUE; }
/*