linux-kernel - [PATCH] arm64: zynqmp: Assign TSU clock frequency for GEMs

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Message-ID: <3b9285b50a2a4abb136ecb0873343a4e84626581.1686228675.git.michal.simek@amd.com>
Date:   Thu, 8 Jun 2023 14:51:23 +0200
From:   Michal Simek <michal.simek@....com>
To:     <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
        <michal.simek@...inx.com>, <git@...inx.com>
CC:     Harini Katakam <harini.katakam@....com>, Andrew Davis <afd@...com>,
        "Ashok Reddy Soma" <ashok.reddy.soma@...inx.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Manikanta Guntupalli <manikanta.guntupalli@....com>,
        Parth Gajjar <parth.gajjar@....com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Robert Hancock <robert.hancock@...ian.com>,
        Vishal Sagar <vishal.sagar@....com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH] arm64: zynqmp: Assign TSU clock frequency for GEMs

From: Harini Katakam <harini.katakam@....com>

Allow changing TSU clock for all GEMs. Kria SOM is using this
functionality that's why set TSU clock frequency as 250MHz (minimum when
running at 1G) to allow PTP functionality.

Signed-off-by: Harini Katakam <harini.katakam@....com>
Signed-off-by: Michal Simek <michal.simek@....com>
---

 arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi       | 4 ++++
 arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso | 1 +
 arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso | 1 +
 3 files changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
index f04716841a0c..ccaca29200bb 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi
@@ -146,24 +146,28 @@ &gem0 {
 	clocks = <&zynqmp_clk LPD_LSBUS>, <&zynqmp_clk GEM0_REF>,
 		 <&zynqmp_clk GEM0_TX>, <&zynqmp_clk GEM0_RX>,
 		 <&zynqmp_clk GEM_TSU>;
+	assigned-clocks = <&zynqmp_clk GEM_TSU>;
 };
 
 &gem1 {
 	clocks = <&zynqmp_clk LPD_LSBUS>, <&zynqmp_clk GEM1_REF>,
 		 <&zynqmp_clk GEM1_TX>, <&zynqmp_clk GEM1_RX>,
 		 <&zynqmp_clk GEM_TSU>;
+	assigned-clocks = <&zynqmp_clk GEM_TSU>;
 };
 
 &gem2 {
 	clocks = <&zynqmp_clk LPD_LSBUS>, <&zynqmp_clk GEM2_REF>,
 		 <&zynqmp_clk GEM2_TX>, <&zynqmp_clk GEM2_RX>,
 		 <&zynqmp_clk GEM_TSU>;
+	assigned-clocks = <&zynqmp_clk GEM_TSU>;
 };
 
 &gem3 {
 	clocks = <&zynqmp_clk LPD_LSBUS>, <&zynqmp_clk GEM3_REF>,
 		 <&zynqmp_clk GEM3_TX>, <&zynqmp_clk GEM3_RX>,
 		 <&zynqmp_clk GEM_TSU>;
+	assigned-clocks = <&zynqmp_clk GEM_TSU>;
 };
 
 &gpio {
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
index e06c6824dea4..ae1b9b2bdbee 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
@@ -145,6 +145,7 @@ &gem3 { /* required by spec */
 	pinctrl-0 = <&pinctrl_gem3_default>;
 	phy-handle = <&phy0>;
 	phy-mode = "rgmii-id";
+	assigned-clock-rates = <250000000>;
 
 	mdio: mdio {
 		#address-cells = <1>;
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
index 030e2c93f0e6..b59e48be6465 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
@@ -128,6 +128,7 @@ &gem3 { /* required by spec */
 	pinctrl-0 = <&pinctrl_gem3_default>;
 	phy-handle = <&phy0>;
 	phy-mode = "rgmii-id";
+	assigned-clock-rates = <250000000>;
 
 	mdio: mdio {
 		#address-cells = <1>;
-- 
2.36.1