linux-kernel - [PATCH v7 3/4] arm64: dts: sdm845: Add serial console support

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Date:   Tue, 12 Jun 2018 11:09:07 -0600
From:   Karthikeyan Ramasubramanian <kramasub@...eaurora.org>
To:     andy.gross@...aro.org, david.brown@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, wsa@...-dreams.de, gregkh@...uxfoundation.org
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-i2c@...r.kernel.org,
        evgreen@...omium.org, acourbot@...omium.org, swboyd@...omium.org,
        dianders@...omium.org,
        Karthikeyan Ramasubramanian <kramasub@...eaurora.org>
Subject: [PATCH v7 3/4] arm64: dts: sdm845: Add serial console support

From: Rajendra Nayak <rnayak@...eaurora.org>

Add the qup uart node and geni se instance needed to
support the serial console on the MTP.

Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@...eaurora.org>
---
 arch/arm64/boot/dts/qcom/sdm845-mtp.dts | 41 +++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sdm845.dtsi    | 39 +++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-mtp.dts b/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
index 979ab49..17b2fb0 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-mtp.dts
@@ -12,4 +12,45 @@
 / {
 	model = "Qualcomm Technologies, Inc. SDM845 MTP";
 	compatible = "qcom,sdm845-mtp";
+
+	aliases {
+		serial0 = &uart2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&soc {
+	geniqup@...000 {
+		status = "okay";
+
+		serial@...000 {
+			status = "okay";
+		};
+	};
+
+	pinctrl@...0000 {
+		qup-uart2-default {
+			pinconf_tx {
+				pins = "gpio4";
+				drive-strength = <2>;
+				bias-disable;
+			};
+
+			pinconf_rx {
+				pins = "gpio5";
+				drive-strength = <2>;
+				bias-pull-up;
+			};
+		};
+
+		qup-uart2-sleep {
+			pinconf {
+				pins = "gpio4", "gpio5";
+				bias-pull-down;
+			};
+		};
+	};
 };
diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 32f8561..71801b9 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -6,6 +6,7 @@
  */
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/clock/qcom,gcc-sdm845.h>
 
 / {
 	interrupt-parent = <&intc>;
@@ -194,6 +195,20 @@
 			#gpio-cells = <2>;
 			interrupt-controller;
 			#interrupt-cells = <2>;
+
+			qup_uart2_default: qup-uart2-default {
+				pinmux {
+					function = "qup9";
+					pins = "gpio4", "gpio5";
+				};
+			};
+
+			qup_uart2_sleep: qup-uart2-sleep {
+				pinmux {
+					function = "gpio";
+					pins = "gpio4", "gpio5";
+				};
+			};
 		};
 
 		timer@...90000 {
@@ -272,5 +287,29 @@
 			#interrupt-cells = <4>;
 			cell-index = <0>;
 		};
+
+		geniqup@...000 {
+			compatible = "qcom,geni-se-qup";
+			reg = <0xac0000 0x6000>;
+			clock-names = "m-ahb", "s-ahb";
+			clocks = <&gcc GCC_QUPV3_WRAP_1_M_AHB_CLK>,
+				 <&gcc GCC_QUPV3_WRAP_1_S_AHB_CLK>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges;
+			status = "disabled";
+
+			uart2: serial@...000 {
+				compatible = "qcom,geni-debug-uart";
+				reg = <0xa84000 0x4000>;
+				clock-names = "se";
+				clocks = <&gcc GCC_QUPV3_WRAP1_S1_CLK>;
+				pinctrl-names = "default", "sleep";
+				pinctrl-0 = <&qup_uart2_default>;
+				pinctrl-1 = <&qup_uart2_sleep>;
+				interrupts = <GIC_SPI 354 IRQ_TYPE_LEVEL_HIGH>;
+				status = "disabled";
+			};
+		};
 	};
 };
-- 
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