tty: serial: xuartps: Setup early console when uartclk is also passed

Baudrate calculation depends on requested baudrate and uart clock.
This patch is checking that uartclk is also passed.

The same logic is used 8250_early.c/init_port function.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index abcb4d09a2d866d05b7af3c1ff5d3f68492514c1..bd72dd843338dc9a3aecaacaa04dc7b2fc2442db 100644 (file)
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1181,7 +1181,7 @@ static int __init cdns_early_console_setup(struct earlycon_device *device,
        /* only set baud if specified on command line - otherwise
         * assume it has been initialized by a boot loader.
         */
-       if (device->baud) {
+       if (port->uartclk && device->baud) {
                u32 cd = 0, bdiv = 0;
                u32 mr;
                int div8;