[openwrt/openwrt] realtek: EnGenius EWS2910P: add support for SFP ports

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/4d1fc8916c50bb06c2cc0147e36d93eba6b85a9c

commit 4d1fc8916c50bb06c2cc0147e36d93eba6b85a9c
Author: Alexandru Gagniuc <mr.nuke.me at gmail.com>
AuthorDate: Sun May 15 21:54:47 2022 -0500

    realtek: EnGenius EWS2910P: add support for SFP ports
    
    The SFP cages 9F and 10F share the same SCL line. Currently, there
    isn't a good way to model this. Thus, only one SFP port can be fully
    supported.
    
    Cage 10F is fully supported with an I2C bus and sfp handle. Linux
    automatically handles enabling or disabling the TX laser.
    
    Cage 9F is only parially supported, without the sfp handle. The SDA
    line is hogged as an input, so that it remains high. SCL transitions
    sould not affect modules connected to this cage. The default value of
    the tx-disable line is high (active). It is exported as a gpio, but
    the laser is off by default. To enable the laser:
    
        echo 0 > /sys/class/gpio/sff-p9-tx-disable/value
    
    Thus, both modules can be used for networking, but only 10F will be
    able to detect and identify a plugged in SFP module.
    
    Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
---
 .../realtek/dts-5.10/rtl8380_engenius_ews2910p.dts | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts b/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
index feb57fecff..f87c9585f9 100644
--- a/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
+++ b/target/linux/realtek/dts-5.10/rtl8380_engenius_ews2910p.dts
@@ -42,6 +42,25 @@
 		#gpio-cells = <2>;
 		gpio-controller;
 		indirect-access-bus-id = <0>;
+
+		sff_p9_gpios {
+			gpio-hog;
+			gpios = < 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>,
+				< 11 GPIO_ACTIVE_HIGH>, /* los-gpio */
+				< 12 GPIO_ACTIVE_LOW>;   /* mod-def0-gpio */
+			input;
+			line-name = "sff-p9-gpios";
+		};
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		sff-p9-tx-disable {
+			gpio-export,name = "sff-p9-tx-disable";
+			gpio-export,output = <1>;
+			gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
+		};
 	};
 
 	gpio-restart {
@@ -72,6 +91,22 @@
 			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
 		};
 	};
+
+	i2c1: i2c-gpio-1 {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpio1 7 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpio1 31 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+	sfp1: sfp-p10 {
+		compatible = "sff,sfp";
+		i2c-bus = <&i2c1>;
+		tx-disable-gpio = <&gpio1 13 GPIO_ACTIVE_HIGH>;
+		los-gpio = <&gpio1 14 GPIO_ACTIVE_HIGH>;
+		mod-def0-gpio = <&gpio1 21 GPIO_ACTIVE_LOW>;
+	};
 };
 
 &spi0 {
@@ -138,6 +173,9 @@
 		INTERNAL_PHY(13)
 		INTERNAL_PHY(14)
 		INTERNAL_PHY(15)
+
+		INTERNAL_PHY(24)
+		INTERNAL_PHY(26)
 	};
 };
 
@@ -155,6 +193,17 @@
 		SWITCH_PORT(14, 7, internal)
 		SWITCH_PORT(15, 8, internal)
 
+		SWITCH_SFP_PORT(24, 9, 1000base-x)
+
+		port at 26 {
+			reg = <26>;
+			label = "lan10";
+			phy-mode = "1000base-x";
+			phy-handle = <&phy26>;
+			managed = "in-band-status";
+			sfp = <&sfp1>;
+		};
+
 		port at 28 {
 			ethernet = <&ethernet0>;
 			reg = <28>;