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>
diff --git a/Documentation/ABI/testing/sysfs-platform-sst-atom b/Documentation/ABI/testing/sysfs-platform-sst-atom
new file mode 100644
index 0000000..0d07c03
--- /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
