summaryrefslogtreecommitdiff
path: root/Documentation/driver-api/serial
diff options
context:
space:
mode:
authorMartin Hundebøll <martin@geanix.com>2019-07-10 22:26:53 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-09-04 13:43:43 +0300
commit69b1aaa4504159054728cebe8df43b82c41e8987 (patch)
tree498dbfba1b1384669d0bd8312fff859f145125ed /Documentation/driver-api/serial
parentd45331b00ddb179e291766617259261c112db872 (diff)
downloadlinux-69b1aaa4504159054728cebe8df43b82c41e8987.tar.xz
tty: n_gsm: remove obsolete mknod doc example
The n_gsm driver handles registration of /dev/gsmttyX nodes, so there's no need to do mknod manually. Signed-off-by: Martin Hundebøll <martin@geanix.com> Link: https://lore.kernel.org/r/20190710192656.60381-1-martin@geanix.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/driver-api/serial')
-rw-r--r--Documentation/driver-api/serial/n_gsm.rst14
1 files changed, 2 insertions, 12 deletions
diff --git a/Documentation/driver-api/serial/n_gsm.rst b/Documentation/driver-api/serial/n_gsm.rst
index f3ad9fd26408..4f37198423f7 100644
--- a/Documentation/driver-api/serial/n_gsm.rst
+++ b/Documentation/driver-api/serial/n_gsm.rst
@@ -63,24 +63,14 @@ Major parts of the initialization program :
daemon(0,0);
pause();
-4. create the devices corresponding to the "virtual" serial ports (take care,
- each modem has its configuration and some DLC have dedicated functions,
- for example GPS), starting with minor 1 (DLC0 is reserved for the management
- of the mux)::
-
- MAJOR=`cat /proc/devices |grep gsmtty | awk '{print $1}`
- for i in `seq 1 4`; do
- mknod /dev/ttygsm$i c $MAJOR $i
- done
-
-5. use these devices as plain serial ports.
+4. use these devices as plain serial ports.
for example, it's possible:
- and to use gnokii to send / receive SMS on ttygsm1
- to use ppp to establish a datalink on ttygsm2
-6. first close all virtual ports before closing the physical port.
+5. first close all virtual ports before closing the physical port.
Note that after closing the physical port the modem is still in multiplexing
mode. This may prevent a successful re-opening of the port later. To avoid