This is a note to let you know that I've just added the patch titled
mxs: uart: fix setting RTS from software
to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From a6833214cfc6fa8a7c59426af77794cc190c6cfc Mon Sep 17 00:00:00 2001
From: Steffen Trumtrar <[email protected]>
Date: Thu, 13 Dec 2012 14:27:43 +0100
Subject: mxs: uart: fix setting RTS from software
With the patch "serial: mxs-auart: fix the wrong RTS hardware flow control" the
mainline mxs-uart driver now sets RTSEN only when hardware flow control is
enabled via software. It is not possible any longer to set RTS manually via
software. However, the manual modification is a valid operation.
Regain the possibility to set RTS via software and only set RTSEN when hardware
flow control is explicitly enabled via settermios cflag CRTSCTS.
Signed-off-by: Steffen Trumtrar <[email protected]>
Cc: stable <[email protected]>
Reviewed-by: Huang Shijie <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/tty/serial/mxs-auart.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 6db23b0..9f63f88 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -412,10 +412,12 @@ static void mxs_auart_set_mctrl(struct uart_port *u,
unsigned mctrl)
u32 ctrl = readl(u->membase + AUART_CTRL2);
- ctrl &= ~AUART_CTRL2_RTSEN;
+ ctrl &= ~(AUART_CTRL2_RTSEN | AUART_CTRL2_RTS);
if (mctrl & TIOCM_RTS) {
if (tty_port_cts_enabled(&u->state->port))
ctrl |= AUART_CTRL2_RTSEN;
+ else
+ ctrl |= AUART_CTRL2_RTS;
}
s->ctrl = mctrl;
--
1.8.1.336.g94702dd
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