From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Rob Herring <robh+dt@kernel.org>
Cc: Andrew Lunn <andrew@lunn.ch>,
Oleksij Rempel <linux@rempel-privat.de>,
Philippe Schenker <philippe.schenker@toradex.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH/RFC 1/5] dt-bindings: net: renesas,ravb: Document internal clock delay properties
Date: Fri, 19 Jun 2020 21:15:50 +0200 [thread overview]
Message-ID: <20200619191554.24942-2-geert+renesas@glider.be> (raw)
In-Reply-To: <20200619191554.24942-1-geert+renesas@glider.be>
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 example accordingly.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
.../devicetree/bindings/net/renesas,ravb.txt | 29 ++++++++++---------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/renesas,ravb.txt b/Documentation/devicetree/bindings/net/renesas,ravb.txt
index 032b76f14f4fdb38..488ada78b6169b8e 100644
--- a/Documentation/devicetree/bindings/net/renesas,ravb.txt
+++ b/Documentation/devicetree/bindings/net/renesas,ravb.txt
@@ -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.
+- renesas,rxc-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.
+- renesas,txc-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>;
+ renesas,rxc-delay-ps = <0>;
+ renesas,txc-delay-ps = <2000>;
pinctrl-0 = <ðer_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>;
--
2.17.1
next prev parent reply other threads:[~2020-06-19 19:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 19:15 [PATCH/RFC 0/5] ravb: Add support for explicit internal clock delay configuration Geert Uytterhoeven
2020-06-19 19:15 ` Geert Uytterhoeven [this message]
2020-06-20 5:47 ` [PATCH/RFC 1/5] dt-bindings: net: renesas,ravb: Document internal clock delay properties Oleksij Rempel
2020-06-20 14:43 ` Andrew Lunn
2020-06-21 8:23 ` Geert Uytterhoeven
2020-06-20 18:15 ` Sergei Shtylyov
2020-06-21 8:26 ` Geert Uytterhoeven
2020-06-19 19:15 ` [PATCH/RFC 2/5] ravb: Split delay handling in parsing and applying Geert Uytterhoeven
2020-06-20 18:34 ` Sergei Shtylyov
2020-06-19 19:15 ` [PATCH/RFC 3/5] ravb: Add support for explicit internal clock delay configuration Geert Uytterhoeven
2020-06-20 19:03 ` Sergei Shtylyov
2020-06-19 19:15 ` [PATCH/RFC 4/5] arm64: dts: renesas: rcar-gen3: Convert EtherAVB to explicit delay handling Geert Uytterhoeven
2020-06-19 19:15 ` [PATCH/RFC 5/5] arm64: dts: renesas: rzg2: " Geert Uytterhoeven
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