linux-kernel - [PATCH v3 1/7] arm64: dts: ti: k3-j722s-main: Add support for SERDES0

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Message-ID: <20240524090514.152727-2-s-vadapalli@ti.com>
Date: Fri, 24 May 2024 14:35:08 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <nm@...com>, <vigneshr@...com>, <afd@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <rogerq@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <u-kumar1@...com>,
        <danishanwar@...com>, <srk@...com>, <s-vadapalli@...com>
Subject: [PATCH v3 1/7] arm64: dts: ti: k3-j722s-main: Add support for SERDES0

From: Ravi Gunasekaran <r-gunasekaran@...com>

AM62P's DT source files are reused for J722S inorder to
avoid duplication of nodes. But J722S has additional
peripherals that are not present in AM62P.

Introduce a -main.dtsi to define such additional main
domain peripherals and define the SERDES0 node.

Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
v2:
https://lore.kernel.org/r/20240513114443.16350-2-r-gunasekaran@ti.com/
Changes since v2:
- Renamed serdes0_ln_ctrl to serdes_ln_ctrl to keep the format
  consistent across SoCs where a single node is sufficient to
  represent the Lane-Muxing for all instances of the Serdes.

v1:
https://lore.kernel.org/r/20240429120932.11456-2-r-gunasekaran@ti.com/
Changes since v1:
- Newly introduced k3-j722s-main.dtsi to add main domain peripherals
  that are additionally present in J722S.
- Used generic node names - renamed "clock-cmnrefclk" to "clk-0",
  "wiz@...0000" to "phy@...0000"

 arch/arm64/boot/dts/ti/k3-j722s-main.dtsi | 64 +++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-j722s-main.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
new file mode 100644
index 000000000000..0dac8f1e1291
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Device Tree file for the J722S main domain peripherals
+ * Copyright (C) 2023-2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include <dt-bindings/phy/phy-ti.h>
+
+/ {
+	serdes_refclk: clk-0 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <0>;
+	};
+};
+
+&cbass_main {
+	serdes_wiz0: phy@...0000 {
+		compatible = "ti,am64-wiz-10g";
+		ranges = <0x0f000000 0x0 0x0f000000 0x00010000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		power-domains = <&k3_pds 279 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 279 0>, <&k3_clks 279 1>, <&serdes_refclk>;
+		clock-names = "fck", "core_ref_clk", "ext_ref_clk";
+		num-lanes = <1>;
+		#reset-cells = <1>;
+		#clock-cells = <1>;
+
+		assigned-clocks = <&k3_clks 279 1>;
+		assigned-clock-parents = <&k3_clks 279 5>;
+
+		serdes0: serdes@...0000 {
+			compatible = "ti,j721e-serdes-10g";
+			reg = <0x0f000000 0x00010000>;
+			reg-names = "torrent_phy";
+			resets = <&serdes_wiz0 0>;
+			reset-names = "torrent_reset";
+			clocks = <&serdes_wiz0 TI_WIZ_PLL0_REFCLK>,
+				 <&serdes_wiz0 TI_WIZ_PHY_EN_REFCLK>;
+			clock-names = "refclk", "phy_en_refclk";
+			assigned-clocks = <&serdes_wiz0 TI_WIZ_PLL0_REFCLK>,
+					  <&serdes_wiz0 TI_WIZ_PLL1_REFCLK>,
+					  <&serdes_wiz0 TI_WIZ_REFCLK_DIG>;
+			assigned-clock-parents = <&k3_clks 279 1>,
+						 <&k3_clks 279 1>,
+						 <&k3_clks 279 1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			#clock-cells = <1>;
+
+			status = "disabled"; /* Needs lane config */
+		};
+	};
+};
+
+&main_conf {
+	serdes_ln_ctrl: mux-controller@...0 {
+		compatible = "reg-mux";
+		reg = <0x4080 0x4>;
+		#mux-control-cells = <1>;
+		mux-reg-masks = <0x0 0x3>; /* SERDES0 lane0 select */
+	};
+};
-- 
2.40.1