arm64: dts: qcom: ipq5332: add support for the RDP468 variant

Add the initial device tree support for the Reference Design
Platform(RDP) 468 based on IPQ5332 family of SoCs. This patch carries the
support for Console UART, SPI NOR, eMMC.

Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230323093120.20558-3-quic_kathirav@quicinc.com

Author: Kathiravan T

arch/arm64/boot/dts/qcom/Makefile

@@ -4,6 +4,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= apq8094-sony-xperia-kitakami-karin_windy.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8096-db820c.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= apq8096-ifc6640.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= ipq5332-mi01.2.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= ipq5332-rdp468.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= ipq6018-cp01-c1.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk01.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= ipq8074-hk10-c1.dtb

arch/arm64/boot/dts/qcom/ipq5332-rdp468.dts

@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * IPQ5332 RDP468 board device tree source
+ *
+ * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+/dts-v1/;
+
+#include "ipq5332.dtsi"
+
+/ {
+	model = "Qualcomm Technologies, Inc. IPQ5332 MI01.6";
+	compatible = "qcom,ipq5332-ap-mi01.6", "qcom,ipq5332";
+
+	aliases {
+		serial0 = &blsp1_uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+};
+
+&blsp1_uart0 {
+	pinctrl-0 = <&serial_0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&blsp1_spi0 {
+	pinctrl-0 = <&spi_0_data_clk_pins &spi_0_cs_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	flash@0 {
+		compatible = "micron,n25q128a11", "jedec,spi-nor";
+		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		spi-max-frequency = <50000000>;
+	};
+};
+
+&sdhc {
+	bus-width = <4>;
+	max-frequency = <192000000>;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	non-removable;
+	pinctrl-0 = <&sdc_default_state>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&sleep_clk {
+	clock-frequency = <32000>;
+};
+
+&xo_board {
+	clock-frequency = <24000000>;
+};
+
+/* PINCTRL */
+
+&tlmm {
+	sdc_default_state: sdc-default-state {
+		clk-pins {
+			pins = "gpio13";
+			function = "sdc_clk";
+			drive-strength = <8>;
+			bias-disable;
+		};
+
+		cmd-pins {
+			pins = "gpio12";
+			function = "sdc_cmd";
+			drive-strength = <8>;
+			bias-pull-up;
+		};
+
+		data-pins {
+			pins = "gpio8", "gpio9", "gpio10", "gpio11";
+			function = "sdc_data";
+			drive-strength = <8>;
+			bias-pull-up;
+		};
+	};
+
+	spi_0_data_clk_pins: spi-0-data-clk-state {
+		pins = "gpio14", "gpio15", "gpio16";
+		function = "blsp0_spi";
+		drive-strength = <2>;
+		bias-pull-down;
+	};
+
+	spi_0_cs_pins: spi-0-cs-state {
+		pins = "gpio17";
+		function = "blsp0_spi";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+};