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authorAlexandre Belloni2019-01-15 18:18:14 +0100
committerGreg Kroah-Hartman2019-01-18 11:23:00 +0100
commitb30fd1a6f6f2920e037fc659a015d0b76c604931 (patch)
treed1affb45e6b91c53223df70cf463ec8c14260abb
parent7d470ebf586bdac32e3ca1c5fcc049c36c6a10d5 (diff)
tty: serial: lpc32xx_hs: fix missing console boot messages
When probing the HSUART, it is put in loopback mode in order to prevent a potential issue that may happen on RX (Errata HSUART.1). serial_lpc32xx_startup() moves it out of loopback mode but this is too late to get the kernel boot messages before userspace opens the device. Also get out of loopback mode in lpc32xx_hsuart_console_setup(). Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/tty/serial/lpc32xx_hs.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index d1d73261575b..f4e27d0ad947 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -151,6 +151,8 @@ static void lpc32xx_hsuart_console_write(struct console *co, const char *s,
local_irq_restore(flags);
}
+static void lpc32xx_loopback_set(resource_size_t mapbase, int state);
+
static int __init lpc32xx_hsuart_console_setup(struct console *co,
char *options)
{
@@ -170,6 +172,8 @@ static int __init lpc32xx_hsuart_console_setup(struct console *co,
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
+ lpc32xx_loopback_set(port->mapbase, 0); /* get out of loopback mode */
+
return uart_set_options(port, co, baud, parity, bits, flow);
}