[patch v7 4/4] Documentation: jtag: Add ABI documentation

[Oleksandr Shamray]

Added document that describe the ABI for JTAG class drivrer

Signed-off-by: Oleksandr Shamray <oleksandrs at mellanox.com>
---
v6->v7
Comments pointed by Pavel Machek <pavel at ucw.cz>
- Added jtag-cdev documentation to Documentation/ABI/testing folder
---
 Documentation/ABI/testing/jatg-cdev |   27 +++++++++++++++++++++++++++
 MAINTAINERS                         |    1 +
 2 files changed, 28 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/ABI/testing/jatg-cdev

diff --git a/Documentation/ABI/testing/jatg-cdev b/Documentation/ABI/testing/jatg-cdev
new file mode 100644
index 0000000..14a3610
--- /dev/null
+++ b/Documentation/ABI/testing/jatg-cdev
@@ -0,0 +1,27 @@
+What:		/dev/jtag[0-9]+
+Date:		September 2017
+KernelVersion:	4.14
+Contact:	oleksandrs at mellanox.com
+Description:
+		The character device files /dev/jtag* are the interface
+		between JTAG master interfase and userspace.
+
+		The ioctl(2)-based ABI is defined and documented in
+		[include/uapi]<linux/jtag.h>.
+
+		The following file operations are supported:
+
+		open(2)
+		The argument flag currently support only one access
+		mode O_RDWR.
+
+		ioctl(2)
+		Initiate various actions.
+		See the inline documentation in [include/uapi]<linux/jtag.h>
+		for descriptions of all ioctls.
+
+		close(2)
+		Stops and free up the I/O contexts that was associated
+		with the file descriptor.
+
+Users:		TBD
\ No newline at end of file
diff --git a/MAINTAINERS b/MAINTAINERS
index bfdfa94..dfcf49c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7300,6 +7300,7 @@ F:	include/linux/jtag.h
 F:	include/uapi/linux/jtag.h
 F:	drivers/jtag/
 F:	Documentation/devicetree/bindings/jtag/
+F:	Documentation/ABI/testing/jtag-cdev
 
 K10TEMP HARDWARE MONITORING DRIVER
 M:	Clemens Ladisch <clemens at ladisch.de>
-- 
1.7.1