diff options
| author | Trent Piepho <tpiepho@impinj.com> | 2019-05-22 18:43:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-22 17:40:17 -0700 |
| commit | 9c3f3410f5ace868c7c82fe4479fd36bed5eee64 (patch) | |
| tree | 8cb3fb8c60ab04def2814bfbf1cb3f6409fe2e37 /Documentation | |
| parent | 74dd5aa1ed94a8099a57bb7f91300668d0600ade (diff) | |
dt-bindings: phy: dp83867: Describe how driver behaves w.r.t rgmii delay
Add a note to make it more clear how the driver behaves when "rgmii" vs
"rgmii-id", "rgmii-idrx", or "rgmii-idtx" interface modes are selected.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Trent Piepho <tpiepho@impinj.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/ti,dp83867.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.txt b/Documentation/devicetree/bindings/net/ti,dp83867.txt index 9ef9338aaee1..99b8681bde49 100644 --- a/Documentation/devicetree/bindings/net/ti,dp83867.txt +++ b/Documentation/devicetree/bindings/net/ti,dp83867.txt @@ -11,6 +11,14 @@ Required properties: - ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h for applicable values +Note: If the interface type is PHY_INTERFACE_MODE_RGMII the TX/RX clock delays + will be left at their default values, as set by the PHY's pin strapping. + The default strapping will use a delay of 2.00 ns. Thus + PHY_INTERFACE_MODE_RGMII, by default, does not behave as RGMII with no + internal delay, but as PHY_INTERFACE_MODE_RGMII_ID. The device tree + should use "rgmii-id" if internal delays are desired as this may be + changed in future to cause "rgmii" mode to disable delays. + Optional property: - ti,min-output-impedance - MAC Interface Impedance control to set the programmable output impedance to |