linux-kernel - [PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

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Message-ID: <20230605110443.84568-1-n-francis@ti.com>
Date:   Mon, 5 Jun 2023 16:34:43 +0530
From:   Neha Malcom Francis <n-francis@...com>
To:     <linux-arm-kernel@...ts.infradead.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <n-francis@...com>
Subject: [PATCH] arm64: dts: ti: k3-j721s2: Change CPTS clock parent

MAIN_PLL0 has a flag set in DM (Device Manager) that removes it's
capability to re-initialise clock frequencies. CPTS and RGMII has
MAIN_PLL3 as their parent which does not have this flag. While RGMII
needs this reinitialisation to default frequency to be able to get
250MHz with its divider, CPTS can not get its required 200MHz with its
divider. Thus, move CPTS clock parent on J721S2 from MAIN_PLL3_HSDIV1 to
MAIN_PLL0_HSDIV6.

(Note: even GTC will be moved from MAIN_PLL3 to MAIN_PLL0 in U-Boot side
for the same reason)

Signed-off-by: Neha Malcom Francis <n-francis@...com>
---
 arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi       | 2 ++
 arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
index 2dd7865f7654..331e0c9b4db8 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
@@ -738,6 +738,8 @@ cpts@...d0000 {
 			reg-names = "cpts";
 			clocks = <&k3_clks 226 5>;
 			clock-names = "cpts";
+			assigned-clocks = <&k3_clks 226 5>; /* NAVSS0_CPTS_0_RCLK */
+			assigned-clock-parents = <&k3_clks 226 7>; /* MAIN_0_HSDIVOUT6_CLK */
 			interrupts-extended = <&main_navss_intr 391>;
 			interrupt-names = "cpts";
 			ti,cpts-periodic-outputs = <6>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
index a353705a7463..b55a3e9daf85 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
@@ -333,6 +333,8 @@ cpts@...00 {
 			reg = <0x0 0x3d000 0x0 0x400>;
 			clocks = <&k3_clks 29 3>;
 			clock-names = "cpts";
+			assigned-clocks = <&k3_clks 29 3>; /* CPTS_RFT_CLK */
+			assigned-clock-parents = <&k3_clks 29 5>; /* MAIN_0_HSDIVOUT6_CLK */
 			interrupts-extended = <&gic500 GIC_SPI 858 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "cpts";
 			ti,cpts-ext-ts-inputs = <4>;
-- 
2.34.1