linux-kernel - [PATCH v3 2/4] arm64: dts: imx8dxl: add lpuart device in cm40 subsystem

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Message-Id: <20240305-m4_lpuart-v3-2-592463ef1d22@nxp.com>
Date: Tue, 05 Mar 2024 10:54:56 -0500
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Frank Li <Frank.Li@....com>, Alice Guo <alice.guo@....com>, 
 Peng Fan <peng.fan@....com>, 
 Alexander Stein <alexander.stein@...tq-group.com>
Subject: [PATCH v3 2/4] arm64: dts: imx8dxl: add lpuart device in cm40
 subsystem

From: Alice Guo <alice.guo@....com>

Add lpuart device in cm40 subsystem.

Signed-off-by: Alice Guo <alice.guo@....com>
Reviewed-by: Peng Fan <peng.fan@....com>
Reviewed-by: Alexander Stein <alexander.stein@...tq-group.com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi b/arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi
index e918ebd76094d..453e4ea6d2c86 100644
--- a/arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-ss-cm40.dtsi
@@ -20,6 +20,18 @@ cm40_subsys: bus@...00000 {
 	ranges = <0x34000000 0x0 0x34000000 0x4000000>;
 	interrupt-parent = <&cm40_intmux>;
 
+	cm40_lpuart: serial@...20000 {
+		compatible = "fsl,imx8qxp-lpuart";
+		reg = <0x37220000 0x1000>;
+		interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cm40_uart_lpcg 1>, <&cm40_uart_lpcg 0>;
+		clock-names = "ipg", "baud";
+		assigned-clocks = <&clk IMX_SC_R_M4_0_UART IMX_SC_PM_CLK_PER>;
+		assigned-clock-rates = <24000000>;
+		power-domains = <&pd IMX_SC_R_M4_0_UART>;
+		status = "disabled";
+	};
+
 	cm40_i2c: i2c@...30000 {
 		compatible = "fsl,imx8qxp-lpi2c", "fsl,imx7ulp-lpi2c";
 		reg = <0x37230000 0x1000>;
@@ -53,6 +65,18 @@ cm40_intmux: intmux@...00000 {
 		status = "disabled";
 	};
 
+	cm40_uart_lpcg: clock-controller@...20000 {
+		compatible = "fsl,imx8qxp-lpcg";
+		reg = <0x37620000 0x1000>;
+		#clock-cells = <1>;
+		clocks = <&clk IMX_SC_R_M4_0_UART IMX_SC_PM_CLK_PER>,
+			 <&cm40_ipg_clk>;
+		clock-indices = <IMX_LPCG_CLK_0>, <IMX_LPCG_CLK_1>;
+		clock-output-names = "cm40_lpcg_uart_clk",
+				     "cm40_lpcg_uart_ipg_clk";
+		power-domains = <&pd IMX_SC_R_M4_0_UART>;
+	};
+
 	cm40_i2c_lpcg: clock-controller@...30000 {
 		compatible = "fsl,imx8qxp-lpcg";
 		reg = <0x37630000 0x1000>;

-- 
2.34.1