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Commit 814453ad authored by Michal Simek's avatar Michal Simek Committed by Greg Kroah-Hartman
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earlycon: Initialize port->uartclk based on clock-frequency property 



On DT based platforms when current-speed property is present baudrate
is setup. Also port->uartclk is initialized to bogus BASE_BAUD * 16
value. Drivers like uartps/ns16550 contain logic when baudrate and
uartclk is used for baudrate calculation.

The patch is reading optional clock-frequency property to replace bogus
BASE_BAUD * 16 calculation to have proper baudrate calculation.

Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 54e53b2e

drivers/tty/serial/earlycon.c

+4 −0
Original line number Diff line number Diff line
@@ -279,6 +279,10 @@ int __init of_setup_earlycon(const struct earlycon_id *match, 
	if (val)

		early_console_dev.baud = be32_to_cpu(*val);



	val = of_get_flat_dt_prop(node, "clock-frequency", NULL);

	if (val)

		port->uartclk = be32_to_cpu(*val);



	if (options) {

		early_console_dev.baud = simple_strtoul(options, NULL, 0);

		strlcpy(early_console_dev.options, options,