linux-kernel - [PATCH 4/5] arm64: dts: ipq5332: Add CMN PLL node for networking hardware

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Message-Id: <20251128-qcom_ipq5332_cmnpll-v1-4-55127ba85613@oss.qualcomm.com>
Date: Fri, 28 Nov 2025 00:40:14 -0800
From: Luo Jie <jie.luo@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Luo Jie <quic_luoj@...cinc.com>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        quic_kkumarcs@...cinc.com, quic_linchen@...cinc.com,
        quic_leiwei@...cinc.com, quic_pavir@...cinc.com,
        quic_suruchia@...cinc.com, Luo Jie <jie.luo@....qualcomm.com>
Subject: [PATCH 4/5] arm64: dts: ipq5332: Add CMN PLL node for networking
 hardware

Add the CMN PLL node required for networking hardware operation on IPQ5332.
The CMN PLL core runs at 6 GHz on this platform, differing from others like
IPQ9574.

Configure the reference clock path where XO (48 MHz or 96 MHz) routes
through the WiFi block's multiplier/divider to provide a stable 48 MHz
reference to the CMN PLL.
.XO (48 MHZ or 96 MHZ)-->WiFi (multiplier/divider)--> 48 MHZ to CMN PLL.

Signed-off-by: Luo Jie <jie.luo@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi | 17 +++++++++++++++-
 arch/arm64/boot/dts/qcom/ipq5332.dtsi            | 26 +++++++++++++++++++++++-
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi b/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
index b37ae7749083..471024ee1ddd 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
@@ -2,7 +2,7 @@
 /*
  * IPQ5332 RDP board common device tree source
  *
- * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
  */
 
 /dts-v1/;
@@ -55,6 +55,17 @@ &blsp1_uart0 {
 	status = "okay";
 };
 
+/*
+ * The bootstrap pins for the board select the XO clock frequency that
+ * supports 48 MHZ or 96 MHZ. This setting automatically enables the
+ * right dividers, to ensure the reference clock output from WiFi to
+ * the CMN PLL is 48 MHZ.
+ */
+&ref_48mhz_clk {
+	clock-div = <1>;
+	clock-mult = <1>;
+};
+
 &sleep_clk {
 	clock-frequency = <32000>;
 };
@@ -63,6 +74,10 @@ &xo_board {
 	clock-frequency = <24000000>;
 };
 
+&xo_clk {
+	clock-frequency = <48000000>;
+};
+
 /* PINCTRL */
 &tlmm {
 	gpio_keys_default: gpio-keys-default-state {
diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
index 45fc512a3bab..0707e053f35d 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
@@ -2,10 +2,11 @@
 /*
  * IPQ5332 device tree source
  *
- * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
  */
 
 #include <dt-bindings/clock/qcom,apss-ipq.h>
+#include <dt-bindings/clock/qcom,ipq5332-cmn-pll.h>
 #include <dt-bindings/clock/qcom,ipq5332-gcc.h>
 #include <dt-bindings/interconnect/qcom,ipq5332.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -16,6 +17,12 @@ / {
 	#size-cells = <2>;
 
 	clocks {
+		ref_48mhz_clk: ref-48mhz-clk {
+			compatible = "fixed-factor-clock";
+			clocks = <&xo_clk>;
+			#clock-cells = <0>;
+		};
+
 		sleep_clk: sleep-clk {
 			compatible = "fixed-clock";
 			#clock-cells = <0>;
@@ -25,6 +32,11 @@ xo_board: xo-board-clk {
 			compatible = "fixed-clock";
 			#clock-cells = <0>;
 		};
+
+		xo_clk: xo-clk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+		};
 	};
 
 	cpus {
@@ -167,6 +179,18 @@ usbphy0: phy@...00 {
 			status = "disabled";
 		};
 
+		cmn_pll: clock-controller@...00 {
+			compatible = "qcom,ipq5332-cmn-pll";
+			reg = <0x0009b000 0x800>;
+			clocks = <&ref_48mhz_clk>,
+				 <&gcc GCC_CMN_12GPLL_AHB_CLK>,
+				 <&gcc GCC_CMN_12GPLL_SYS_CLK>;
+			clock-names = "ref", "ahb", "sys";
+			#clock-cells = <1>;
+			assigned-clocks = <&cmn_pll IPQ5332_CMN_PLL_CLK>;
+			assigned-clock-rates-u64 = /bits/ 64 <6000000000>;
+		};
+
 		qfprom: efuse@...00 {
 			compatible = "qcom,ipq5332-qfprom", "qcom,qfprom";
 			reg = <0x000a4000 0x721>;

-- 
2.43.0