bmips: b53: enable bcm63268 internal PHYs

On the smartrg sr505n the bootloader only sets registers to enable the
PHYs if it's interrupted. When Linux boots this results in a -EINVAL
error when trying to read from the EPHYs and the GPHY doesn't work.
This patch disables low power mode in the GPHY/EPHYs and properly resets
the EPHYs.

Signed-off-by: Kyle Hendry <kylehendrydev@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17648
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

target/linux/bmips/dts/bcm6318.dtsi

@@ -260,6 +260,12 @@
 					pins = "gpio40";
 				};
 			};
+
+			ephy_rst: reset-controller@3c {
+				compatible = "brcm,bcm6345-reset";
+				reg = <0x3c 0x4>;
+				#reset-cells = <1>;
+			};
 		};
 
 		uart0: serial@10000100 {
@@ -399,6 +405,8 @@
 			reg = <0x10080000 0x8000>;
 			big-endian;
 
+			brcm,gpio-ctrl = <&gpio_cntl>;
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -431,21 +439,41 @@
 				phy1: ethernet-phy@1 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <1>;
+
+					resets = <&ephy_rst 0>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy2: ethernet-phy@2 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <2>;
+
+					resets = <&ephy_rst 1>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy3: ethernet-phy@3 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <3>;
+
+					resets = <&ephy_rst 2>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy4: ethernet-phy@4 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <4>;
+
+					resets = <&ephy_rst 3>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 			};
 

target/linux/bmips/dts/bcm63268.dtsi

@@ -288,6 +288,12 @@
 					pins = "dsl_gpio9";
 				};
 			};
+
+			ephy_rst: reset-controller@3c {
+				compatible = "brcm,bcm6345-reset";
+				reg = <0x3c 0x4>;
+				#reset-cells = <1>;
+			};
 		};
 
 		uart0: serial@10000180 {
@@ -481,8 +487,7 @@
 				 <&timer_clk BCM63268_TCLK_GPHY1>;
 
 			resets = <&periph_rst BCM63268_RST_ENETSW>,
-				 <&periph_rst BCM63268_RST_EPHY>,
+				 <&periph_rst BCM63268_RST_EPHY>;
-				 <&periph_rst BCM63268_RST_GPHY>;
 
 			power-domains = <&periph_pwr BCM63268_POWER_DOMAIN_ROBOSW>;
 
@@ -532,6 +537,8 @@
 			reg = <0x10700000 0x8000>;
 			big-endian;
 
+			brcm,gpio-ctrl = <&gpio_cntl>;
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -564,21 +571,41 @@
 				phy1: ethernet-phy@1 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <1>;
+
+					resets = <&ephy_rst 0>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy2: ethernet-phy@2 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <2>;
+
+					resets = <&ephy_rst 1>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy3: ethernet-phy@3 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <3>;
+
+					resets = <&ephy_rst 2>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy4: ethernet-phy@4 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <4>;
+
+					resets = <&periph_rst BCM63268_RST_GPHY>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 			};
 

target/linux/bmips/dts/bcm6328.dtsi

@@ -248,6 +248,12 @@
 					pins = "usb_port1";
 				};
 			};
+
+			ephy_rst: reset-controller@3c {
+				compatible = "brcm,bcm6345-reset";
+				reg = <0x3c 0x4>;
+				#reset-cells = <1>;
+			};
 		};
 
 		uart0: serial@10000100 {
@@ -417,6 +423,8 @@
 			reg = <0x10e00000 0x8000>;
 			big-endian;
 
+			brcm,gpio-ctrl = <&gpio_cntl>;
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -449,21 +457,41 @@
 				phy1: ethernet-phy@1 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <1>;
+
+					resets = <&ephy_rst 0>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy2: ethernet-phy@2 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <2>;
+
+					resets = <&ephy_rst 1>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy3: ethernet-phy@3 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <3>;
+
+					resets = <&ephy_rst 2>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy4: ethernet-phy@4 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <4>;
+
+					resets = <&ephy_rst 3>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 			};
 

target/linux/bmips/dts/bcm6362.dtsi

@@ -323,6 +323,12 @@
 					pins = "nand_grp";
 				};
 			};
+
+			ephy_rst: reset-controller@3c {
+				compatible = "brcm,bcm6345-reset";
+				reg = <0x3c 0x4>;
+				#reset-cells = <1>;
+			};
 		};
 
 		uart0: serial@10000100 {
@@ -526,6 +532,8 @@
 			reg = <0x10e00000 0x8000>;
 			big-endian;
 
+			brcm,gpio-ctrl = <&gpio_cntl>;
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -558,21 +566,41 @@
 				phy1: ethernet-phy@1 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <1>;
+
+					resets = <&ephy_rst 0>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy2: ethernet-phy@2 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <2>;
+
+					resets = <&ephy_rst 1>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy3: ethernet-phy@3 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <3>;
+
+					resets = <&ephy_rst 2>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy4: ethernet-phy@4 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <4>;
+
+					resets = <&ephy_rst 3>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 			};
 

target/linux/bmips/dts/bcm6368.dtsi

@@ -337,6 +337,12 @@
 					pins = "uart1_grp";
 				};
 			};
+
+			ephy_rst: reset-controller@3c {
+				compatible = "brcm,bcm6345-reset";
+				reg = <0x3c 0x4>;
+				#reset-cells = <1>;
+			};
 		};
 
 		leds: led-controller@100000d0 {
@@ -528,6 +534,8 @@
 			reg = <0x10f00000 0x8000>;
 			big-endian;
 
+			brcm,gpio-ctrl = <&gpio_cntl>;
+
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
@@ -560,21 +568,41 @@
 				phy1: ethernet-phy@1 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <1>;
+
+					resets = <&ephy_rst 6>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy2: ethernet-phy@2 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <2>;
+
+					resets = <&ephy_rst 7>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy3: ethernet-phy@3 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <3>;
+
+					resets = <&ephy_rst 8>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 
 				phy4: ethernet-phy@4 {
 					compatible = "ethernet-phy-ieee802.3-c22";
 					reg = <4>;
+
+					resets = <&ephy_rst 9>;
+					reset-names = "phy";
+					reset-assert-us = <2000>;
+					reset-deassert-us = <2000>;
 				};
 			};