On Mon, Mar 16, 2020 at 6:19 PM Chunyan Zhang <zhang.lyra@xxxxxxxxx> wrote: > > From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx> > > 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@xxxxxxxxx/ > > Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx> Reviewed-by: Baolin Wang <baolin.wang7@xxxxxxxxx> > --- > drivers/tty/serial/sprd_serial.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c > index 3d3c70634589..18706333f146 100644 > --- a/drivers/tty/serial/sprd_serial.c > +++ b/drivers/tty/serial/sprd_serial.c > @@ -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; > -- > 2.20.1 > -- Baolin Wang
