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From:   Grygorii Strashko <grygorii.strashko@ti.com>
To:     Nishanth Menon <nm@ti.com>, <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Lokesh Vutla <lokeshvutla@ti.com>
CC:     <linux-kernel@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        Tero Kristo <kristo@kernel.org>,
        Grygorii Strashko <grygorii.strashko@ti.com>
Subject: [PATCH v2 1/4] arm64: dts: ti: k3-am64-main: Add CPSW DT node
Date:   Thu, 4 Mar 2021 23:10:35 +0200
Message-ID: <20210304211038.12511-2-grygorii.strashko@ti.com>
In-Reply-To: <20210304211038.12511-1-grygorii.strashko@ti.com>
References: <20210304211038.12511-1-grygorii.strashko@ti.com>
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From: Vignesh Raghavendra <vigneshr@ti.com>

Add CPSW3g DT node with two external ports, MDIO and CPTS support. For
CPSW3g DMA channels the ASEL is set to 15 (AM642x per DMA channel coherency
feature), so that CPSW DMA channel participates in Coherency and thus avoid
need to cache maintenance for SKBs. This improves bidirectional TCP
performance by up to 100Mbps (on 1G link).

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
---
 arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 74 ++++++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am64.dtsi      |  2 +
 2 files changed, 76 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index 5f85950daef7..80443dbf272c 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
@@ -178,6 +178,12 @@
 			compatible = "ti,am654-chipid";
 			reg = <0x00000014 0x4>;
 		};
+
+		phy_gmii_sel: phy@4044 {
+			compatible = "ti,am654-phy-gmii-sel";
+			reg = <0x4044 0x8>;
+			#phy-cells = <1>;
+		};
 	};
 
 	main_uart0: serial@2800000 {
@@ -402,4 +408,72 @@
 		ti,otap-del-sel-ddr50 = <0x9>;
 		ti,clkbuf-sel = <0x7>;
 	};
+
+	cpsw3g: ethernet@8000000 {
+		compatible = "ti,am642-cpsw-nuss";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		reg = <0x0 0x8000000 0x0 0x200000>;
+		reg-names = "cpsw_nuss";
+		ranges = <0x0 0x0 0x0 0x8000000 0x0 0x200000>;
+		clocks = <&k3_clks 13 0>;
+		assigned-clocks = <&k3_clks 13 1>;
+		assigned-clock-parents = <&k3_clks 13 9>;
+		clock-names = "fck";
+		power-domains = <&k3_pds 13 TI_SCI_PD_EXCLUSIVE>;
+
+		dmas = <&main_pktdma 0xC500 15>,
+		       <&main_pktdma 0xC501 15>,
+		       <&main_pktdma 0xC502 15>,
+		       <&main_pktdma 0xC503 15>,
+		       <&main_pktdma 0xC504 15>,
+		       <&main_pktdma 0xC505 15>,
+		       <&main_pktdma 0xC506 15>,
+		       <&main_pktdma 0xC507 15>,
+		       <&main_pktdma 0x4500 15>;
+		dma-names = "tx0", "tx1", "tx2", "tx3", "tx4", "tx5", "tx6",
+			    "tx7", "rx";
+
+		ethernet-ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			cpsw_port1: port@1 {
+				reg = <1>;
+				ti,mac-only;
+				label = "port1";
+				phys = <&phy_gmii_sel 1>;
+				mac-address = [00 00 de ad be ef];
+			};
+
+			cpsw_port2: port@2 {
+				reg = <2>;
+				ti,mac-only;
+				label = "port2";
+				phys = <&phy_gmii_sel 2>;
+				mac-address = [00 01 de ad be ef];
+			};
+		};
+
+		cpsw3g_mdio: mdio@f00 {
+			compatible = "ti,cpsw-mdio","ti,davinci_mdio";
+			reg = <0x0 0xf00 0x0 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clocks = <&k3_clks 13 0>;
+			clock-names = "fck";
+			bus_freq = <1000000>;
+		};
+
+		cpts@3d000 {
+			compatible = "ti,j721e-cpts";
+			reg = <0x0 0x3d000 0x0 0x400>;
+			clocks = <&k3_clks 13 1>;
+			clock-names = "cpts";
+			interrupts-extended = <&gic500 GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "cpts";
+			ti,cpts-ext-ts-inputs = <4>;
+			ti,cpts-periodic-outputs = <2>;
+		};
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am64.dtsi b/arch/arm64/boot/dts/ti/k3-am64.dtsi
index 0ae8c844c482..de6805b0c72c 100644
--- a/arch/arm64/boot/dts/ti/k3-am64.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64.dtsi
@@ -28,6 +28,8 @@
 		serial6 = &main_uart4;
 		serial7 = &main_uart5;
 		serial8 = &main_uart6;
+		ethernet0 = &cpsw_port1;
+		ethernet1 = &cpsw_port2;
 	};
 
 	chosen { };
-- 
2.17.1