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serial: sprd: check console via stdout-path in addition

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The SPRD serial driver need to know which serial port would be used as
console in an early period during initialization, the purpose is to
keep the console port alive as possible even if there's some error
caused by no clock configured under serial devicetree nodes. But with
the patch [1], the console port couldn't be identified if missing
console command line.

So this patch adds using another interface to do check by reading
stdout-path.

[1] https://lore.kernel.org/lkml/20190826072929.7696-4-zhang.lyra@gmail.com/

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/20200316101930.9962-2-zhang.lyra@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunyan Zhang 2020-03-16 18:19:28 +08:00 committed by Greg Kroah-Hartman
parent c3a834e87c
commit 72cc06be19
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/sprd_serial.c
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@ -1147,7 +1147,8 @@ static bool sprd_uart_is_console(struct uart_port *uport)
{
struct console *cons = sprd_uart_driver.cons;
if (cons && cons->index >= 0 && cons->index == uport->line)
if ((cons && cons->index >= 0 && cons->index == uport->line) ||
of_console_check(uport->dev->of_node, SPRD_TTY_NAME, uport->line))
return true;
return false;