linux-kernel - [RESEND PATCH] arm64: dts: ti: k3-j784s4-mcu-wakeup: Configure wkup

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Message-ID: <20250603042448.783956-1-u-kumar1@ti.com>
Date: Tue, 3 Jun 2025 09:54:48 +0530
From: Udit Kumar <u-kumar1@...com>
To: <nm@...com>, <vigneshr@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <linux-kernel@...r.kernel.org>,
        <u-kumar1@...com>, <b-padhi@...com>
Subject: [RESEND PATCH] arm64: dts: ti: k3-j784s4-mcu-wakeup: Configure wkup_uart0 with clock settings

From: Bhavya Kapoor <b-kapoor@...com>

This commit adds the assigned-clocks and assigned-clock-parents
properties for wkup_uart0 in J784S4. Specifically, the assigned-clocks
property is set to reference the clock identified by
"wkup_usart_mcupll_bypass_out0", ensuring the UART operates with the
correct clock source.

The assigned-clock-parents property specifies "wkup_usart_clksel_out0"
as the parent clock. This configuration is critical for establishing
the proper clocking hierarchy, enabling the UART device to function
reliably across different baud rates.

Signed-off-by: Bhavya Kapoor <b-kapoor@...com>
---
Link to v1: https://lore.kernel.org/all/20241009072056.3511346-1-b-kapoor@ti.com/

 arch/arm64/boot/dts/ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi
index 52e2965a3bf5..1146bc5990ea 100644
--- a/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-j742s2-mcu-wakeup-common.dtsi
@@ -310,6 +310,8 @@ wkup_uart0: serial@...00000 {
 		interrupts = <GIC_SPI 897 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&k3_clks 397 0>;
 		clock-names = "fclk";
+		assigned-clocks = <&k3_clks 397 0>;
+		assigned-clock-parents = <&k3_clks 397 1>;
 		power-domains = <&k3_pds 397 TI_SCI_PD_EXCLUSIVE>;
 		status = "disabled";
 	};
-- 
2.34.1