arm64: dts: qcom: Add support for SONY Xperia XZ2 / XZ2C / XZ3 (Tama platform)

Add support for SONY Xperia XZ2, XZ2 Compact and XZ3 smartphones, all based on
the Qualcomm SDM845 chipset. There also exists a fourth Tama device, the XZ2
Premium (Aurora) with a 4K display, but it's relatively rare.

The devices are affected by a scary UFS behaviour where sending a certain UFS
command (which is worked around on downstream) renders the device unbootable,
by effectively erasing the bootloader. Therefore UFS AND UFSPHY are strictly
disabled for now.

Downstream workaround:
https://github.com/kholk/kernel/commit/2e7a9ee1c91a016baa0b826a7752ec45663a0561

This platform's bootloader is not very nice either. To boot mainline you need
to flash a bogus DTBO (fastboot erasing may cut it, but it takes an inhumane
amount of time) - one that's just 4 bytes (all zeroes) seems to work just fine.

Of course, one can also provide a "normal" DTBO (device-specific DT overlayed
on top of the SoC DT), but that's not yet supported by the mainline kernel
build system.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Martin Botka <martin.botka@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211111184630.605035-1-konrad.dybcio@somainline.org

arch/arm64/boot/dts/qcom/Makefile

@@ -97,6 +97,9 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-db845c.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-mtp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-oneplus-enchilada.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-oneplus-fajita.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-sony-xperia-tama-akari.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-sony-xperia-tama-akatsuki.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-sony-xperia-tama-apollo.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-xiaomi-beryllium.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm850-lenovo-yoga-c630.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm6125-sony-xperia-seine-pdx201.dtb

arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts

+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2021, Konrad Dybcio <konrad.dybcio@somainline.org>
+ */
+
+/dts-v1/;
+
+#include "sdm845-sony-xperia-tama.dtsi"
+
+/ {
+	model = "Sony Xperia XZ2";
+	compatible = "sony,akari-row", "qcom,sdm845";
+};

arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts

+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2021, Konrad Dybcio <konrad.dybcio@somainline.org>
+ */
+
+/dts-v1/;
+
+#include "sdm845-sony-xperia-tama.dtsi"
+
+/ {
+	model = "Sony Xperia XZ3";
+	compatible = "sony,akatsuki-row", "qcom,sdm845";
+};
+
+/* For the future: WLED + LAB/IBB/OLEDB are not used on Akatsuki */
+&vreg_l14a_1p8 {
+	regulator-min-microvolt = <1840000>;
+	regulator-max-microvolt = <1840000>;
+};
+
+&vreg_l22a_2p8 {
+	regulator-min-microvolt = <2700000>;
+	regulator-max-microvolt = <2700000>;
+};
+
+&vreg_l28a_2p8 {
+	regulator-min-microvolt = <3000000>;
+	regulator-max-microvolt = <3000000>;
+};

arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts

+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2021, Konrad Dybcio <konrad.dybcio@somainline.org>
+ */
+
+/dts-v1/;
+
+#include "sdm845-sony-xperia-tama.dtsi"
+
+/ {
+	model = "Sony Xperia XZ2 Compact";
+	compatible = "sony,apollo-row", "qcom,sdm845";
+};