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

Message ID 777dc4f87d27e9db383ef04bd21b8aebbb2b2015.1524473714.git.michal.simek@xilinx.com (mailing list archive)
State New, archived
Headers show

Commit Message

Michal Simek April 23, 2018, 8:55 a.m. UTC 
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>
---

 drivers/tty/serial/xilinx_uartps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 19d370779767..0fc9de20843c 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -1142,7 +1142,7 @@  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;