arm64: dts: qcom: msm8916-wingtech-wt88047: Add sound and modem

Enable sound and modem for the Xiaomi Redmi 2. The setup
is similar to most MSM8916 devices, i.e.:

 - QDSP6 audio
 - Earpiece/headphones/microphones via digital/analog codec in
   MSM8916/PM8916
 - Audio jack detection via analog codec in PM8916
 - WWAN Internet via BAM-DMUX

except:

 - Speaker amplifier is connected to HPH_R (headphones) output of the
   analog codec. There is a separate analog switch that allows disabling
   playback via the headphone jack.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20231003-msm8916-modem-v2-7-61b684be55c0@gerhold.netSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/msm8916-wingtech-wt88047.dts

@@ -6,6 +6,8 @@
 /dts-v1/;
 
 #include "msm8916-pm8916.dtsi"
+#include "msm8916-modem-qdsp6.dtsi"
+
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/leds/common.h>
@@ -25,6 +27,28 @@ chosen {
 		stdout-path = "serial0";
 	};
 
+	speaker_amp: audio-amplifier {
+		compatible = "simple-audio-amplifier";
+		enable-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>;
+		sound-name-prefix = "Speaker Amp";
+		pinctrl-0 = <&speaker_amp_default>;
+		pinctrl-names = "default";
+	};
+
+	/*
+	 * This seems to be actually an analog switch that either routes audio
+	 * to the headphone jack or nowhere. Given that we need to enable a GPIO
+	 * to get sound on headphones, modelling it as simple-audio-amplifier
+	 * works just fine.
+	 */
+	headphones_switch: audio-switch {
+		compatible = "simple-audio-amplifier";
+		enable-gpios = <&tlmm 8 GPIO_ACTIVE_HIGH>;
+		sound-name-prefix = "Headphones Switch";
+		pinctrl-0 = <&headphones_switch_default>;
+		pinctrl-names = "default";
+	};
+
 	flash-led-controller {
 		compatible = "ocs,ocp8110";
 		enable-gpios = <&tlmm 31 GPIO_ACTIVE_HIGH>;
@@ -146,6 +170,18 @@ &blsp_uart2 {
 	status = "okay";
 };
 
+&mpss_mem {
+	reg = <0x0 0x86800000 0x0 0x5100000>;
+};
+
+&pm8916_codec {
+	qcom,micbias1-ext-cap;
+	qcom,micbias-lvl = <2800>;
+	qcom,mbhc-vthreshold-low = <75 100 120 180 500>;
+	qcom,mbhc-vthreshold-high = <75 100 120 180 500>;
+	qcom,hphl-jack-type-normally-open;
+};
+
 &pm8916_resin {
 	status = "okay";
 	linux,code = <KEY_VOLUMEDOWN>;
@@ -180,6 +216,30 @@ &sdhc_2 {
 	non-removable;
 };
 
+&sound {
+	/*
+	 * Provide widgets/pin-switches to allow enabling speaker and headphones
+	 * separately. Both are routed via the HPH_L/HPH_R pins of the codec.
+	 */
+	model = "wt88047";
+	widgets =
+		"Speaker", "Speaker",
+		"Headphone", "Headphones";
+	pin-switches = "Speaker", "Headphones";
+	audio-routing =
+		"Speaker", "Speaker Amp OUTL",
+		"Speaker", "Speaker Amp OUTR",
+		"Speaker Amp INL", "HPH_R",
+		"Speaker Amp INR", "HPH_R",
+		"Headphones", "Headphones Switch OUTL",
+		"Headphones", "Headphones Switch OUTR",
+		"Headphones Switch INL", "HPH_L",
+		"Headphones Switch INR", "HPH_R",
+		"AMIC1", "MIC BIAS External1",
+		"AMIC2", "MIC BIAS Internal2";
+	aux-devs = <&speaker_amp>, <&headphones_switch>;
+};
+
 &usb {
 	status = "okay";
 	extcon = <&usb_id>, <&usb_id>;
@@ -226,6 +286,13 @@ gpio_keys_default: gpio-keys-default-state {
 		bias-pull-up;
 	};
 
+	headphones_switch_default: headphones-switch-default-state {
+		pins = "gpio8";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	imu_default: imu-default-state {
 		pins = "gpio115";
 		function = "gpio";
@@ -234,6 +301,13 @@ imu_default: imu-default-state {
 		bias-disable;
 	};
 
+	speaker_amp_default: speaker-amp-default-state {
+		pins = "gpio117";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	touchscreen_default: touchscreen-default-state {
 		touchscreen-pins {
 			pins = "gpio13";