linux-kernel - [PATCH V3 10/14] arm64: dts: imx8mn-evk: enable uart1

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Date:   Tue,  8 Nov 2022 10:18:16 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V3 10/14] arm64: dts: imx8mn-evk: enable uart1

From: Peng Fan <peng.fan@....com>

Enable uart1 for BT usage
Configure the clock to source from IMX8MN_SYS_PLL1_80M, because the uart
could only support max 1.5M buadrate if using OSC_24M as clock source.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index 1971f095e4c2..12dc5d398a03 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -247,6 +247,15 @@ &spdif1 {
 	status = "okay";
 };
 
+&uart1 { /* BT */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+	assigned-clocks = <&clk IMX8MN_CLK_UART1>;
+	assigned-clock-parents = <&clk IMX8MN_SYS_PLL1_80M>;
+	fsl,uart-has-rtscts;
+	status = "okay";
+};
+
 &uart2 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
@@ -440,6 +449,15 @@ MX8MN_IOMUXC_SD1_STROBE_GPIO2_IO11	0x159
 		>;
 	};
 
+	pinctrl_uart1: uart1grp {
+		fsl,pins = <
+			MX8MN_IOMUXC_UART1_RXD_UART1_DCE_RX	0x140
+			MX8MN_IOMUXC_UART1_TXD_UART1_DCE_TX	0x140
+			MX8MN_IOMUXC_UART3_RXD_UART1_DCE_CTS_B	0x140
+			MX8MN_IOMUXC_UART3_TXD_UART1_DCE_RTS_B	0x140
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MN_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
-- 
2.37.1