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| author | Ulrich Hecht <ulrich.hecht+renesas@gmail.com> | 2017-02-08 18:31:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-10 15:10:16 +0100 |
| commit | 90afa5255f5c5ae67c869918e4c5f60b8580db70 (patch) | |
| tree | de12ae1c357c5c6bcc335db5636d0474e0b7c982 /drivers | |
| parent | 6a5f0e2f9352accf857f683518bd3cc6ef6ae6c6 (diff) | |
| download | linux-stable-90afa5255f5c5ae67c869918e4c5f60b8580db70.tar.gz linux-stable-90afa5255f5c5ae67c869918e4c5f60b8580db70.tar.bz2 linux-stable-90afa5255f5c5ae67c869918e4c5f60b8580db70.zip | |
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')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 11 |
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); } } } |