]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
dt-bindings: net: renesas,ravb: Document internal clock delay properties
authorGeert Uytterhoeven <geert+renesas@glider.be>
Thu, 1 Oct 2020 10:10:05 +0000 (12:10 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 1 Oct 2020 19:53:30 +0000 (12:53 -0700)
Some EtherAVB variants support internal clock delay configuration, which
can add larger delays than the delays that are typically supported by
the PHY (using an "rgmii-*id" PHY mode, and/or "[rt]xc-skew-ps"
properties).

Add properties for configuring the internal MAC delays.
These properties are mandatory, even when specified as zero, to
distinguish between old and new DTBs.

Update the (bogus) example accordingly.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Documentation/devicetree/bindings/net/renesas,ravb.txt

index 032b76f14f4fdb384a594fae6858160ae2997705..4a62dd11d5c488f419a2c3fefb287afd902079fc 100644 (file)
@@ -64,6 +64,18 @@ Optional properties:
                         AVB_LINK signal.
 - renesas,ether-link-active-low: boolean, specify when the AVB_LINK signal is
                                 active-low instead of normal active-high.
+- rx-internal-delay-ps: Internal RX clock delay.
+                       This property is mandatory and valid only on R-Car Gen3
+                       and RZ/G2 SoCs.
+                       Valid values are 0 and 1800.
+                       A non-zero value is allowed only if phy-mode = "rgmii".
+                       Zero is not supported on R-Car D3.
+- tx-internal-delay-ps: Internal TX clock delay.
+                       This property is mandatory and valid only on R-Car H3,
+                       M3-W, M3-W+, M3-N, V3M, and V3H, and RZ/G2M and RZ/G2N.
+                       Valid values are 0 and 2000.
+                       A non-zero value is allowed only if phy-mode = "rgmii".
+                       Zero is not supported on R-Car V3H.
 
 Example:
 
@@ -105,8 +117,10 @@ Example:
                                  "ch24";
                clocks = <&cpg CPG_MOD 812>;
                power-domains = <&cpg>;
-               phy-mode = "rgmii-id";
+               phy-mode = "rgmii";
                phy-handle = <&phy0>;
+               rx-internal-delay-ps = <0>;
+               tx-internal-delay-ps = <2000>;
 
                pinctrl-0 = <&ether_pins>;
                pinctrl-names = "default";
@@ -115,18 +129,7 @@ Example:
                #size-cells = <0>;
 
                phy0: ethernet-phy@0 {
-                       rxc-skew-ps = <900>;
-                       rxdv-skew-ps = <0>;
-                       rxd0-skew-ps = <0>;
-                       rxd1-skew-ps = <0>;
-                       rxd2-skew-ps = <0>;
-                       rxd3-skew-ps = <0>;
-                       txc-skew-ps = <900>;
-                       txen-skew-ps = <0>;
-                       txd0-skew-ps = <0>;
-                       txd1-skew-ps = <0>;
-                       txd2-skew-ps = <0>;
-                       txd3-skew-ps = <0>;
+                       rxc-skew-ps = <1500>;
                        reg = <0>;
                        interrupt-parent = <&gpio2>;
                        interrupts = <11 IRQ_TYPE_LEVEL_LOW>;