FROMLIST: arm64: dts: qcom: monaco-evk: Add SDHCI support for eMMC via overlay

Enable the SDHCI controller for eMMC functionality on the Monaco EVK
using a device tree overlay. Configure the corresponding VCC regulator
parameters to support the eMMC interface.

Signed-off-by: Monish Chunara <monish.chunara@oss.qualcomm.com>

Author: mchunara007

arch/arm64/boot/dts/qcom/Makefile

@@ -60,6 +60,9 @@ dtb-$(CONFIG_ARCH_QCOM)	+= monaco-evk-ifp-mezzanine.dtb
 monaco-evk-sd-card-dtbs := monaco-evk.dtb monaco-evk-sd-card.dtbo
 dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-sd-card.dtb
 
+monaco-evk-emmc-dtbs := monaco-evk.dtb monaco-evk-emmc.dtbo
+dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-emmc.dtb
+
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8216-samsung-fortuna3g.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-acer-a1-724.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8916-alcatel-idol347.dtb

arch/arm64/boot/dts/qcom/monaco-evk-emmc.dtso

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+        vreg_s2s: regulator-vreg-s2s {
+                compatible = "regulator-fixed";
+                regulator-name = "regulator-s2s";
+
+                regulator-min-microvolt = <1800000>;
+                regulator-max-microvolt = <1800000>;
+        };
+};
+
+&sdhc_1 {
+	vmmc-supply = <&vreg_l8a>;
+	vqmmc-supply = <&vreg_s2s>;
+
+	supports-cqe;
+
+	pinctrl-0 = <&sdc1_state_on>;
+	pinctrl-1 = <&sdc1_state_off>;
+
+	pinctrl-names = "default", "sleep";
+
+	non-removable;
+
+	bus-width = <8>;
+	no-sd;
+	no-sdio;
+
+	status = "okay";
+};
+
+&vreg_l8a {
+	regulator-min-microvolt = <2960000>;
+	regulator-max-microvolt = <2960000>;
+};