From ca782f16ce02e3f4fa2ae28a5ff256ac69f731e2 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Mon, 6 Apr 2015 10:52:39 -0400 Subject: earlycon: 8250: Document kernel command line options Document the expected behavior of kernel command lines of the forms: console=uart[8250],io|mmio|mmio32,[,options] console=uart[8250],[,options] and earlycon=uart[8250],io|mmio|mmio32,[,options] earlycon=uart[8250],[,options] Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 18142ee3c013..422ebea96a64 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -3471,12 +3471,13 @@ static int univ8250_console_setup(struct console *co, char *options) * @options: ptr to option string from console command line * * Only attempts to match console command lines of the form: - * console=uart<>,io|mmio|mmio32,, - * console=uart<>,,options + * console=uart[8250],io|mmio|mmio32,[,] + * console=uart[8250],0x[,] * This form is used to register an initial earlycon boot console and * replace it with the serial8250_console at 8250 driver init. * * Performs console setup for a match (as required by interface) + * If no are specified, then assume the h/w is already setup. * * Returns 0 if console matches; otherwise non-zero to use default matching */ -- cgit v1.2.3-59-g8ed1b