arm64: dts: qcom: sa8155p-adp: Add support for uSD card

Add support for uSD card on SA8155p-ADP board using the SDHC2
interface.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220403144151.92572-3-bhupesh.sharma@linaro.org

arch/arm64/boot/dts/qcom/sa8155p-adp.dts

@@ -317,6 +317,20 @@ &remoteproc_cdsp {
 	firmware-name = "qcom/sa8155p/cdsp.mdt";
 };
 
+&sdhc_2 {
+	status = "okay";
+
+	cd-gpios = <&tlmm 4 GPIO_ACTIVE_LOW>;
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&sdc2_on>;
+	pinctrl-1 = <&sdc2_off>;
+	vqmmc-supply = <&vreg_l13c_2p96>; /* IO line power */
+	vmmc-supply = <&vreg_l17a_2p96>;  /* Card power line */
+	bus-width = <4>;
+	no-sdio;
+	no-emmc;
+};
+
 &uart2 {
 	status = "okay";
 };
@@ -405,6 +419,60 @@ &pcie1_phy {
 &tlmm {
 	gpio-reserved-ranges = <0 4>;
 
+	sdc2_on: sdc2_on {
+		clk {
+			pins = "sdc2_clk";
+			bias-disable;		/* No pull */
+			drive-strength = <16>;	/* 16 MA */
+		};
+
+		cmd {
+			pins = "sdc2_cmd";
+			bias-pull-up;		/* pull up */
+			drive-strength = <16>;	/* 16 MA */
+		};
+
+		data {
+			pins = "sdc2_data";
+			bias-pull-up;		/* pull up */
+			drive-strength = <16>;	/* 16 MA */
+		};
+
+		sd-cd {
+			pins = "gpio96";
+			function = "gpio";
+			bias-pull-up;		/* pull up */
+			drive-strength = <2>;	/* 2 MA */
+		};
+	};
+
+	sdc2_off: sdc2_off {
+		clk {
+			pins = "sdc2_clk";
+			bias-disable;		/* No pull */
+			drive-strength = <2>;	/* 2 MA */
+		};
+
+		cmd {
+			pins = "sdc2_cmd";
+			bias-pull-up;		/* pull up */
+			drive-strength = <2>;	/* 2 MA */
+		};
+
+		data {
+			pins = "sdc2_data";
+			bias-pull-up;		/* pull up */
+			drive-strength = <2>;	/* 2 MA */
+		};
+
+		sd-cd {
+			pins = "gpio96";
+			function = "gpio";
+			bias-pull-up;		/* pull up */
+			drive-strength = <2>;	/* 2 MA */
+		};
+	};
+
 	usb2phy_ac_en1_default: usb2phy_ac_en1_default {
 		mux {
 			pins = "gpio113";