arm64: dts: qcom: add initial support for qcom sa8775p-ride

This adds basic support for the Qualcomm sa8775p platform and the
reference board: sa8775p-ride. The dt files describe the basics of the
SoC and enable booting to shell.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230214092713.211054-3-brgl@bgdev.pl

arch/arm64/boot/dts/qcom/Makefile

@@ -75,6 +75,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= qru1000-idp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sa8155p-adp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sa8295p-adp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sa8540p-ride.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sa8775p-ride.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sc7180-idp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sc7180-trogdor-coachz-r1.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sc7180-trogdor-coachz-r1-lte.dtb

arch/arm64/boot/dts/qcom/sa8775p-ride.dts

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2023, Linaro Limited
+ */
+
+/dts-v1/;
+
+#include "sa8775p.dtsi"
+
+/ {
+	model = "Qualcomm SA8775P Ride";
+	compatible = "qcom,sa8775p-ride", "qcom,sa8775p";
+
+	aliases {
+		serial0 = &uart10;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&qupv3_id_1 {
+	status = "okay";
+};
+
+&sleep_clk {
+	clock-frequency = <32764>;
+};
+
+&tlmm {
+	qup_uart10_default: qup-uart10-state {
+		pins = "gpio46", "gpio47";
+		function = "qup1_se3";
+	};
+};
+
+&uart10 {
+	compatible = "qcom,geni-debug-uart";
+	pinctrl-0 = <&qup_uart10_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&xo_board_clk {
+	clock-frequency = <38400000>;
+};