From 60efcf0414be5876d81276e3c1fd12680ba2ce71 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 12 Jun 2014 12:52:44 -0500 Subject: [PATCH] tty/serial: fix 8250 early console option passing to regular console In the conversion to generic early console, the passing of options from the early 8250 console to the regular ttyS console was broken. This resulted in the baud rate changing when switching consoles during boot. This feature allows specifying a single console option on the kernel command line rather than both an early console and regular serial tty console. It would be nice to generalize this feature. However, it only works if the correct baud rate can be probed early which is not the case on many platforms which have non-standard UART clock rates. So for now, this is left as an 8250 specific feature. Reported-and-tested-by: Tony Luck Signed-off-by: Rob Herring Cc: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_early.c | 5 ++++- drivers/tty/serial/earlycon.c | 2 +- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index cfef801a49d4..4858b8a99d3b 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -144,8 +144,11 @@ static int __init early_serial8250_setup(struct earlycon_device *device, if (!(device->port.membase || device->port.iobase)) return 0; - if (!device->baud) + if (!device->baud) { device->baud = probe_baud(&device->port); + snprintf(device->options, sizeof(device->options), "%u", + device->baud); + } init_port(device); diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index 5131b5ee6164..a514ee6f5406 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -25,7 +25,7 @@ #include static struct console early_con = { - .name = "earlycon", + .name = "uart", /* 8250 console switch requires this name */ .flags = CON_PRINTBUFFER | CON_BOOT, .index = -1, }; -- GitLab