HSI: Add HSI ABI documentation

Adds sysfs HSI framework documentation

Signed-off-by: Carlos Chinea <carlos.chinea@nokia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-hsi b/Documentation/ABI/testing/sysfs-bus-hsi
new file mode 100644
index 000000000000..1b1b282a99e1
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-hsi
@@ -0,0 +1,19 @@
+What:           /sys/bus/hsi
+Date:           April 2012
+KernelVersion:  3.4
+Contact:        Carlos Chinea <carlos.chinea@nokia.com>
+Description:
+                High Speed Synchronous Serial Interface (HSI) is a
+                serial interface mainly used for connecting application
+                engines (APE) with cellular modem engines (CMT) in cellular
+                handsets.
+                The bus will be populated with devices (hsi_clients) representing
+                the protocols available in the system. Bus drivers implement
+                those protocols.
+
+What:           /sys/bus/hsi/devices/.../modalias
+Date:           April 2012
+KernelVersion:  3.4
+Contact:        Carlos Chinea <carlos.chinea@nokia.com>
+Description:    Stores the same MODALIAS value emitted by uevent
+                Format: hsi:<hsi_client device name>