[PATCH 2/2] tty: n_gsm: add partial copyright Siemens Mobility GmbH

["D. Starke" <daniel.starke@siemens.com>]

From: Daniel Starke <daniel.starke@siemens.com>

More than 1/3 of the n_gsm code has been contributed by us in the last
1.5 years, completing conformance with the standard and stabilizing the
driver:
- added UI (unnumbered information) frame support
- added PN (parameter negotiation) message handling and function support
- added optional keep-alive control link supervision via test messages
- added TIOCM_OUT1 and TIOCM_OUT2 to allow responder to operate as modem
- added TIOCMIWAIT support on virtual ttys
- added additional ioctls and parameters to configure the new functions
- added overall locking mechanism to avoid data race conditions
- added outgoing data flow to decouple physical from virtual tty handling
  for better performance and to avoid dead-locks
- fixed advanced option mode implementation
- fixed convergence layer type 2 implementation
- fixed handling of CLD (multiplexer close down) messages
- fixed broken muxer close down procedure
- and many more bug fixes

With this most of our initial RFC has been implemented. It gives the driver
a quality boost unseen in the decade before.

Add a partial copyright notice to the n_gsm files to highlight this
contribution.

Link: https://lore.kernel.org/all/20220225080758.2869-1-daniel.starke@siemens.com/
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
---
 drivers/tty/n_gsm.c         | 1 +
 include/uapi/linux/gsmmux.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 0ee7531c9201..fa882c7f4770 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2,6 +2,7 @@
 /*
  * n_gsm.c GSM 0710 tty multiplexor
  * Copyright (c) 2009/10 Intel Corporation
+ * Portions Copyright (c) 2022/23 Siemens Mobility GmbH
  *
  *	* THIS IS A DEVELOPMENT SNAPSHOT IT IS NOT A FINAL RELEASE *
  *
diff --git a/include/uapi/linux/gsmmux.h b/include/uapi/linux/gsmmux.h
index 4c878d84dbda..101ebd15954e 100644
--- a/include/uapi/linux/gsmmux.h
+++ b/include/uapi/linux/gsmmux.h
@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* Portions Copyright (c) 2022/23 Siemens Mobility GmbH */
 #ifndef _LINUX_GSMMUX_H
 #define _LINUX_GSMMUX_H
 
-- 
2.34.1