ASoC: Intel: Add ASoC Intel SST Atom sysfs description

For ASoC Intel SST Atom based devices a sysfs entry is created
in order to track FW version. The FW version is useful in order to
check the different Version of LPE DSP FW across Intel SoCs.

Signed-off-by: Sebastien Guiriec <sebastien.guiriec@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-platform-sst-atom b/Documentation/ABI/testing/sysfs-platform-sst-atom
new file mode 100644
index 000000000000..0d07c0395660
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-sst-atom
@@ -0,0 +1,17 @@
+What:           /sys/devices/platform/8086%x:00/firmware_version
+Date:           November 2016
+KernelVersion:  4.10
+Contact:        "Sebastien Guiriec" <sebastien.guiriec@intel.com>
+Description:
+                LPE Firmware version for SST driver on all atom
+                plaforms (BYT/CHT/Merrifield/BSW).
+                If the FW has never been loaded it will display:
+                        "FW not yet loaded"
+                If FW has been loaded it will display:
+                        "v01.aa.bb.cc"
+                aa: Major version is reflecting SoC version:
+                        0d: BYT FW
+                        0b: BSW FW
+                        07: Merrifield FW
+                bb: Minor version
+                cc: Build version