netdev - [PATCH v2 2/3] dt-binding: net: sfp binding documentation

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Message-Id: <7ae5d883fd038cf518949b0aa9cbe5369e2a1851.1504086672.git.baruch@tkos.co.il>
Date:   Wed, 30 Aug 2017 12:51:11 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <rmk+kernel@....linux.org.uk>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Baruch Siach <baruch@...s.co.il>
Subject: [PATCH v2 2/3] dt-binding: net: sfp binding documentation

Add device-tree binding documentation SFP transceivers. Support for SFP
transceivers has been recently introduced (drivers/net/phy/sfp.c).

Signed-off-by: Baruch Siach <baruch@...s.co.il>
---
v2:
  Rename -gpio properties to -gpios
  Rename the rate-select-gpio property to rate-select0-gpios
  Add the rate-select1-gpios property
  Add examples
---
 Documentation/devicetree/bindings/net/sff,sfp.txt | 74 +++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/sff,sfp.txt

diff --git a/Documentation/devicetree/bindings/net/sff,sfp.txt b/Documentation/devicetree/bindings/net/sff,sfp.txt
new file mode 100644
index 000000000000..1d9c786d6287
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/sff,sfp.txt
@@ -0,0 +1,74 @@
+Small Form Factor (SFF) Committee Small Form-factor Pluggable (SFP)
+Transceiver
+
+Required properties:
+
+- compatible : must be "sff,sfp"
+
+Optional Properties:
+
+- i2c-bus : phandle of an I2C bus controller for the SFP two wire serial
+  interface
+
+- moddef0-gpios : phandle of the MOD-DEF0 (AKA Mod_ABS) module presence input
+  gpio signal
+
+- los-gpios : phandle of the Receiver Loss of Signal Indication input gpio
+  signal
+
+- tx-fault-gpios : phandle of the Module Transmitter Fault input gpio signal
+
+- tx-disable-gpios : phandle of the Transmitter Disable output gpio signal
+
+- rate-select0-gpios : phandle of the Rx Signaling Rate Select (AKA RS0) output
+  gpio
+
+- rate-select1-gpios : phandle of the Tx Signaling Rate Select (AKA RS1) output
+  gpio (SFP+ only)
+
+Example #1: Direct serdes to SFP connection
+
+sfp_eth3: sfp-eth3 {
+	compatible = "sff,sfp";
+	i2c-bus = <&sfp_1g_i2c>;
+	los-gpios = <&cpm_gpio2 22 GPIO_ACTIVE_HIGH>;
+	moddef0-gpios = <&cpm_gpio2 21 GPIO_ACTIVE_LOW>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&cpm_sfp_1g_pins &cps_sfp_1g_pins>;
+	tx-disable-gpios = <&cps_gpio1 24 GPIO_ACTIVE_HIGH>;
+	tx-fault-gpios = <&cpm_gpio2 19 GPIO_ACTIVE_HIGH>;
+};
+
+&cps_emac3 {
+	phy-mode = "sgmii";
+	phy-names = "comphy";
+	phys = <&cps_comphy 5 COMPHY_SGMII2>;
+	sfp = <&sfp_eth3>;
+};
+
+Example #2: Serdes to PHY to SFP connection
+
+sfp_eth0: sfp-eth0 {
+	compatible = "sff,sfp+";
+	i2c-bus = <&sfpp0_i2c>;
+	los-gpio = <&cps_gpio1 28 GPIO_ACTIVE_HIGH>;
+	moddef0-gpio = <&cps_gpio1 27 GPIO_ACTIVE_LOW>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&cps_sfpp0_pins>;
+	tx-disable-gpio = <&cps_gpio1 29 GPIO_ACTIVE_HIGH>;
+	tx-fault-gpio  = <&cps_gpio1 26 GPIO_ACTIVE_HIGH>;
+};
+
+p0_phy: ethernet-phy@0 {
+	compatible = "ethernet-phy-ieee802.3-c45";
+	pinctrl-names = "default";
+	pinctrl-0 = <&cpm_phy0_pins &cps_phy0_pins>;
+	reg = <0>;
+	interrupt = <&cpm_gpio2 18 IRQ_TYPE_EDGE_FALLING>;
+	sfp = <&sfp_eth0>;
+};
+
+&cpm_eth0 {
+	phy = <&p0_phy>;
+	phy-mode = "10gbase-kr";
+};
-- 
2.14.1