Add a minimal devicetree capable of booting on the Pixel 2 XL MSM8998
device.

It's currently possible to boot the device into postmarketOS with USB
networking, however the display panel depends on Display Stream
Compression which is not yet supported in the kernel.

The bootloader also requires that the dtbo partition contains a device
tree overlay with a particular id which has to be overlayed onto the
existing dtb. It's possible to use a specially crafted dtbo partition to
workaround this, more information is available here:

    https://gitlab.com/calebccff/dtbo-google-wahoo-mainline

Signed-off-by: Caleb Connolly <ca...@connolly.tech>
---
It's possible to get wifi working by running Bjorns diag-router in the
background, without this the wifi firmware crashes every 10 seconds or
so. This is the same issue encountered on the OnePlus 5.

 arch/arm64/boot/dts/qcom/Makefile             |   1 +
 .../boot/dts/qcom/msm8998-google-taimen.dts   |  14 +
 .../boot/dts/qcom/msm8998-google-wahoo.dtsi   | 391 ++++++++++++++++++
 3 files changed, 406 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/msm8998-google-taimen.dts
 create mode 100644 arch/arm64/boot/dts/qcom/msm8998-google-wahoo.dtsi

diff --git a/arch/arm64/boot/dts/qcom/Makefile 
b/arch/arm64/boot/dts/qcom/Makefile
index 5113fac80b7a..d942d3ec3928 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -16,6 +16,7 @@ dtb-$(CONFIG_ARCH_QCOM)       += 
msm8994-msft-lumia-cityman.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8994-sony-xperia-kitakami-sumire.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8996-mtp.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8998-asus-novago-tp370ql.dtb
+dtb-$(CONFIG_ARCH_QCOM)        += msm8998-google-taimen.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8998-hp-envy-x2.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8998-lenovo-miix-630.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8998-mtp.dtb
diff --git a/arch/arm64/boot/dts/qcom/msm8998-google-taimen.dts 
b/arch/arm64/boot/dts/qcom/msm8998-google-taimen.dts
new file mode 100644
index 000000000000..ffaaafe14037
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8998-google-taimen.dts
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020, Caleb Connolly <ca...@connolly.tech>
+ */
+
+/dts-v1/;
+
+#include "msm8998-google-wahoo.dtsi"
+
+/ {
+       model = "Google Pixel 2 XL";
+       compatible = "google,taimen", "google,wahoo", "qcom,msm8998", 
"qcom,msm8998-mtp";
+       qcom,msm-id = <0x124 0x20001>;
+};
diff --git a/arch/arm64/boot/dts/qcom/msm8998-google-wahoo.dtsi 
b/arch/arm64/boot/dts/qcom/msm8998-google-wahoo.dtsi
new file mode 100644
index 000000000000..0c221ead2df7
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8998-google-wahoo.dtsi
@@ -0,0 +1,391 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2020 Caleb Connolly <ca...@connolly.tech> */
+
+#include "msm8998.dtsi"
+#include "pm8998.dtsi"
+#include "pmi8998.dtsi"
+#include "pm8005.dtsi"
+
+/delete-node/ &mpss_mem;
+/delete-node/ &venus_mem;
+/delete-node/ &mba_mem;
+/delete-node/ &slpi_mem;
+
+/ {
+       aliases {
+       };
+
+       chosen {
+               #address-cells = <2>;
+               #size-cells = <2>;
+               ranges;
+
+               /* Add "earlycon" intended to be used in combination with UART 
serial console */
+               bootargs = "clk_ignore_unused earlycon 
console=ttyGS0,115200";// loglevel=10 drm.debug=15 debug";
+       };
+
+       reserved-memory {
+               #address-cells = <2>;
+               #size-cells = <2>;
+               ranges;
+
+               mpss_mem: memory@8cc00000 {
+                       reg = <0 0x8cc00000 0 0x7800000>;
+                       no-map;
+               };
+
+               venus_mem: memory@94400000 {
+                       reg = <0 0x94400000 0 0x500000>;
+                       no-map;
+               };
+
+               mba_mem: memory@94100000 {
+                       reg = <0 0x94900000 0 0x200000>;
+                       no-map;
+               };
+
+               slpi_mem: memory@94b00000 {
+                       reg = <0 0x94b00000 0 0x700000>;
+                       no-map;
+               };
+
+               ramoops: ramoops@a1810000 {
+                       compatible = "ramoops";
+                       reg = <0 0xa1810000 0 0x200000>;
+                       record-size = <0x20000>;
+                       console-size = <0x100000>;
+                       pmsg-size = <0x80000>;
+               };
+       };
+
+       vph_pwr: vph-pwr-regulator {
+               compatible = "regulator-fixed";
+               regulator-name = "vph_pwr";
+               regulator-always-on;
+               regulator-boot-on;
+       };
+};
+
+&blsp1_uart3 {
+       status = "disabled";
+
+       bluetooth {
+               compatible = "qcom,wcn3990-bt";
+
+               vddio-supply = <&vreg_s4a_1p8>;
+               vddxo-supply = <&vreg_l7a_1p8>;
+               vddrf-supply = <&vreg_l17a_1p3>;
+               vddch0-supply = <&vreg_l25a_3p3>;
+               max-speed = <3200000>;
+       };
+};
+
+&pcie0 {
+       status = "disabled";
+};
+
+&pm8005_lsid1 {
+       pm8005-regulators {
+               compatible = "qcom,pm8005-regulators";
+
+               vdd_s1-supply = <&vph_pwr>;
+
+               pm8005_s1: s1 { /* VDD_GFX supply */
+                       regulator-min-microvolt = <524000>;
+                       regulator-max-microvolt = <1100000>;
+                       regulator-enable-ramp-delay = <500>;
+
+                       /* hack until we rig up the gpu consumer */
+                       regulator-always-on;
+               };
+       };
+};
+
+&qusb2phy {
+       status = "okay";
+
+       vdda-pll-supply = <&vreg_l12a_1p8>;
+       vdda-phy-dpdm-supply = <&vreg_l24a_3p075>;
+};
+
+&remoteproc_adsp {
+       status = "okay";
+
+       firmware-name = "qcom/pixel2/adsp.mdt";
+};
+
+&remoteproc_mss {
+       firmware-name = "qcom/pixel2/mba.mbn",
+                       "qcom/pixel2/modem.mdt";
+};
+
+&remoteproc_slpi {
+       status = "okay";
+
+       firmware-name = "qcom/pixel2/slpi_v2.mdt";
+};
+
+&rpm_requests {
+       pm8998-regulators {
+               compatible = "qcom,rpm-pm8998-regulators";
+
+               vdd_s1-supply = <&vph_pwr>;
+               vdd_s2-supply = <&vph_pwr>;
+               vdd_s3-supply = <&vph_pwr>;
+               vdd_s4-supply = <&vph_pwr>;
+               vdd_s5-supply = <&vph_pwr>;
+               vdd_s6-supply = <&vph_pwr>;
+               vdd_s7-supply = <&vph_pwr>;
+               vdd_s8-supply = <&vph_pwr>;
+               vdd_s9-supply = <&vph_pwr>;
+               vdd_s10-supply = <&vph_pwr>;
+               vdd_s11-supply = <&vph_pwr>;
+               vdd_s12-supply = <&vph_pwr>;
+               vdd_s13-supply = <&vph_pwr>;
+               vdd_l1_l27-supply = <&vreg_s7a_1p025>;
+               vdd_l2_l8_l17-supply = <&vreg_s3a_1p35>;
+               vdd_l3_l11-supply = <&vreg_s7a_1p025>;
+               vdd_l4_l5-supply = <&vreg_s7a_1p025>;
+               vdd_l6-supply = <&vreg_s5a_2p04>;
+               vdd_l7_l12_l14_l15-supply = <&vreg_s5a_2p04>;
+               vdd_l9-supply = <&vreg_bob>;
+               vdd_l10_l23_l25-supply = <&vreg_bob>;
+               vdd_l13_l19_l21-supply = <&vreg_bob>;
+               vdd_l16_l28-supply = <&vreg_bob>;
+               vdd_l18_l22-supply = <&vreg_bob>;
+               vdd_l20_l24-supply = <&vreg_bob>;
+               vdd_l26-supply = <&vreg_s3a_1p35>;
+               vdd_lvs1_lvs2-supply = <&vreg_s4a_1p8>;
+
+               vreg_s3a_1p35: s3 {
+                       regulator-min-microvolt = <1352000>;
+                       regulator-max-microvolt = <1352000>;
+               };
+               vreg_s4a_1p8: s4 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+                       regulator-allow-set-load;
+               };
+               vreg_s5a_2p04: s5 {
+                       regulator-min-microvolt = <1904000>;
+                       regulator-max-microvolt = <2040000>;
+               };
+               vreg_s7a_1p025: s7 {
+                       regulator-min-microvolt = <900000>;
+                       regulator-max-microvolt = <1028000>;
+               };
+               vreg_l1a_0p875: l1 {
+                       regulator-min-microvolt = <880000>;
+                       regulator-max-microvolt = <880000>;
+               };
+               vreg_l2a_1p2: l2 {
+                       regulator-min-microvolt = <1200000>;
+                       regulator-max-microvolt = <1200000>;
+               };
+               vreg_l3a_1p0: l3 {
+                       regulator-min-microvolt = <1000000>;
+                       regulator-max-microvolt = <1000000>;
+               };
+               vreg_l5a_0p8: l5 {
+                       regulator-min-microvolt = <800000>;
+                       regulator-max-microvolt = <800000>;
+               };
+               vreg_l6a_1p8: l6 {
+                       regulator-min-microvolt = <1808000>;
+                       regulator-max-microvolt = <1808000>;
+               };
+               vreg_l7a_1p8: l7 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+               };
+               vreg_l8a_1p2: l8 {
+                       regulator-min-microvolt = <1200000>;
+                       regulator-max-microvolt = <1200000>;
+               };
+               vreg_l9a_1p8: l9 {
+                       regulator-min-microvolt = <1808000>;
+                       regulator-max-microvolt = <2960000>;
+               };
+               vreg_l10a_1p8: l10 {
+                       regulator-min-microvolt = <1808000>;
+                       regulator-max-microvolt = <2960000>;
+               };
+               vreg_l11a_1p0: l11 {
+                       regulator-min-microvolt = <1000000>;
+                       regulator-max-microvolt = <1000000>;
+               };
+               vreg_l12a_1p8: l12 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+               };
+               vreg_l13a_2p95: l13 {
+                       regulator-min-microvolt = <1808000>;
+                       regulator-max-microvolt = <2960000>;
+               };
+               vreg_l14a_1p88: l14 {
+                       regulator-min-microvolt = <1880000>;
+                       regulator-max-microvolt = <1880000>;
+               };
+               vreg_15a_1p8: l15 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+               };
+               vreg_l16a_2p7: l16 {
+                       regulator-min-microvolt = <2704000>;
+                       regulator-max-microvolt = <2704000>;
+               };
+               vreg_l17a_1p3: l17 {
+                       regulator-min-microvolt = <1304000>;
+                       regulator-max-microvolt = <1304000>;
+               };
+               vreg_l18a_2p7: l18 {
+                       regulator-min-microvolt = <2704000>;
+                       regulator-max-microvolt = <2704000>;
+               };
+               vreg_l19a_3p0: l19 {
+                       regulator-min-microvolt = <3008000>;
+                       regulator-max-microvolt = <3008000>;
+               };
+               vreg_l20a_2p95: l20 {
+                       regulator-min-microvolt = <2960000>;
+                       regulator-max-microvolt = <2960000>;
+                       regulator-allow-set-load;
+               };
+               vreg_l21a_2p95: l21 {
+                       regulator-min-microvolt = <2960000>;
+                       regulator-max-microvolt = <2960000>;
+                       regulator-allow-set-load;
+                       regulator-system-load = <800000>;
+               };
+               vreg_l22a_2p85: l22 {
+                       regulator-min-microvolt = <2864000>;
+                       regulator-max-microvolt = <2864000>;
+               };
+               vreg_l23a_3p3: l23 {
+                       regulator-min-microvolt = <3312000>;
+                       regulator-max-microvolt = <3312000>;
+               };
+               vreg_l24a_3p075: l24 {
+                       regulator-min-microvolt = <3088000>;
+                       regulator-max-microvolt = <3088000>;
+               };
+               vreg_l25a_3p3: l25 {
+                       regulator-min-microvolt = <3104000>;
+                       regulator-max-microvolt = <3312000>;
+               };
+               vreg_l26a_1p2: l26 {
+                       regulator-min-microvolt = <1200000>;
+                       regulator-max-microvolt = <1200000>;
+                       regulator-allow-set-load;
+               };
+               vreg_l28_3p0: l28 {
+                       regulator-min-microvolt = <3008000>;
+                       regulator-max-microvolt = <3008000>;
+               };
+
+               vreg_lvs1a_1p8: lvs1 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+               };
+
+               vreg_lvs2a_1p8: lvs2 {
+                       regulator-min-microvolt = <1800000>;
+                       regulator-max-microvolt = <1800000>;
+               };
+
+       };
+
+       pmi8998-regulators {
+               compatible = "qcom,rpm-pmi8998-regulators";
+
+               vdd_bob-supply = <&vph_pwr>;
+
+               vreg_bob: bob {
+                       regulator-min-microvolt = <3312000>;
+                       regulator-max-microvolt = <3600000>;
+               };
+       };
+};
+
+&spmi_bus {
+       pmic@0 {
+               compatible = "qcom,pm8994", "qcom,spmi-pmic";
+               reg = <0x0 SPMI_USID>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+               pon@800 {
+                       compatible = "qcom,pm8916-pon";
+
+                       reg = <0x800>;
+                       mode-bootloader = <0x2>;
+                       mode-recovery = <0x1>;
+
+                       pwrkey {
+                               compatible = "qcom,pm8941-pwrkey";
+                               interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
+                               debounce = <15625>;
+                               bias-pull-up;
+                               linux,code = <KEY_POWER>;
+                       };
+               };
+       };
+};
+
+&tlmm {
+       gpio-reserved-ranges = <0 4>, <81 4>;
+};
+
+/*
+ * The device does contain a USB3 capable type-c port,
+ * however it doesn't seem to work when superspeed mode is
+ * enabled.
+ */
+&usb3 {
+       status = "okay";
+
+       /* Operate "GCC_USB30_MASTER_CLK" in HS mode (>=60 MHz) */
+       assigned-clock-rates = <19200000>, <60000000>;
+
+       /* Disable USB3 pipe_clk requirement */
+       qcom,select-utmi-as-pipe-clk;
+};
+
+&usb3_dwc3 {
+       /* Drop USB 3 SuperSpeed PHY to bring up the "usb0" interface */
+       phys = <&qusb2phy>;
+       phy-names = "usb2-phy";
+
+       /* We can only operate at USB 2.0 speeds */
+       maximum-speed = "high-speed";
+
+       /* Force to peripheral until we have Type-C hooked up */
+       dr_mode = "peripheral";
+};
+
+&ufshc {
+       vcc-supply = <&vreg_l20a_2p95>;
+       vccq-supply = <&vreg_l26a_1p2>;
+       vccq2-supply = <&vreg_s4a_1p8>;
+       vcc-max-microamp = <750000>;
+       vccq-max-microamp = <560000>;
+       vccq2-max-microamp = <750000>;
+};
+
+&ufsphy {
+       vdda-phy-supply = <&vreg_l1a_0p875>;
+       vdda-pll-supply = <&vreg_l2a_1p2>;
+       vddp-ref-clk-supply = <&vreg_l26a_1p2>;
+       vdda-phy-max-microamp = <51400>;
+       vdda-pll-max-microamp = <14600>;
+       vddp-ref-clk-max-microamp = <100>;
+       vddp-ref-clk-always-on;
+};
+
+&wifi {
+       status = "okay";
+
+       vdd-0.8-cx-mx-supply = <&vreg_l5a_0p8>;
+       vdd-1.8-xo-supply = <&vreg_l7a_1p8>;
+       vdd-1.3-rfa-supply = <&vreg_l17a_1p3>;
+       vdd-3.3-ch0-supply = <&vreg_l25a_3p3>;
+};
-- 
2.29.2


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