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-rw-r--r--dts/Bindings/scsi/hisilicon-sas.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/dts/Bindings/scsi/hisilicon-sas.txt b/dts/Bindings/scsi/hisilicon-sas.txt
index df3bef7..8c6659e 100644
--- a/dts/Bindings/scsi/hisilicon-sas.txt
+++ b/dts/Bindings/scsi/hisilicon-sas.txt
@@ -53,6 +53,13 @@ Main node required properties:
Optional main node properties:
- hip06-sas-v2-quirk-amt : when set, indicates that the v2 controller has the
"am-max-transmissions" limitation.
+ - hisilicon,signal-attenuation : array of 3 32-bit values, containing de-emphasis,
+ preshoot, and boost attenuation readings for the board. They
+ are used to describe the signal attenuation of the board. These
+ values' range is 7600 to 12400, and used to represent -24dB to
+ 24dB.
+ The formula is "y = (x-10000)/10000". For example, 10478
+ means 4.78dB.
Example:
sas0: sas@c1000000 {