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authorUlrich Hecht <ulrich.hecht+renesas@gmail.com>2017-02-08 18:31:14 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-10 15:10:16 +0100
commit90afa5255f5c5ae67c869918e4c5f60b8580db70 (patch)
treede12ae1c357c5c6bcc335db5636d0474e0b7c982 /drivers/tty
parent6a5f0e2f9352accf857f683518bd3cc6ef6ae6c6 (diff)
downloadlinux-90afa5255f5c5ae67c869918e4c5f60b8580db70.tar.bz2
serial: sh-sci: fix hardware RX trigger level setting
1. Do not set the RX trigger level for software timeout devices on reset; there is no timeout by default, and data will rot. 2. Do set the RX trigger level for hardware timeout devices when set via sysfs attribute. Fixes SCIFA-type serial consoles. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/sh-sci.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index f95a56ca936e..9a47cc4f16a2 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1076,8 +1076,11 @@ static ssize_t rx_trigger_store(struct device *dev,
if (kstrtol(buf, 0, &r) == -EINVAL)
return -EINVAL;
+
sci->rx_trigger = scif_set_rtrg(port, r);
- scif_set_rtrg(port, 1);
+ if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
+ scif_set_rtrg(port, 1);
+
return count;
}
@@ -2179,7 +2182,11 @@ static void sci_reset(struct uart_port *port)
setup_timer(&s->rx_fifo_timer, rx_fifo_timer_fn,
(unsigned long)s);
} else {
- scif_set_rtrg(port, s->rx_trigger);
+ if (port->type == PORT_SCIFA ||
+ port->type == PORT_SCIFB)
+ scif_set_rtrg(port, 1);
+ else
+ scif_set_rtrg(port, s->rx_trigger);
}
}
}