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-rw-r--r-- | Documentation/devicetree/bindings/net/micrel-ksz90x1.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt index 2f71e7320576..9c84f3dc862c 100644 --- a/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt +++ b/Documentation/devicetree/bindings/net/micrel-ksz90x1.txt @@ -63,8 +63,21 @@ KSZ9131: step is 100ps. Unlike KSZ9031, the values represent picoseccond delays. A negative value can be assigned as rxc-skew-psec = <(-100)>;. + The KSZ9131 provides additional 2ns delay register for RXC and TXC signals + with the RX DLL and TX DLL Control Register. This is a self adjusting delay + locked loop that maintains 2ns of delay for either RXC or TXC register. + Optional properties: + - rxc-dll-2ns : 1 to enable 2ns dll controlled delay on RXC + 0 to disable this delay. + If omitted, register will not be touched. The + delay is enabled by default by hardware. + - txc-dll-2ns : 1 to enable 2ns dll controlled delay on TXC + 0 to disable this delay. + If omitted, register will not be touched. The + delay is disabled by default by hardware. + Range of the value -700 to 2400, default value 0: - rxc-skew-psec : Skew control of RX clock pad |