[PATCH 09/10] ARM: dts: qcom: msm8974: add the USB3 controller and its PHYs

[Dmitry Baryshkov]

The primary USB port of MSM8974 - a Synopsys DWC3 behind the standard
Qualcomm wrapper - is not described, so boards can only use the two
ChipIdea controllers.

Describe the wrapper and the DWC3 core together with both of its
QSCRATCH-controlled PHYs: the HS PHY at qscratch + 0x00 and the
SuperSpeed PHY at qscratch + 0x30 (compatible with the ipq806x SS PHY).
The HS PHY reference is the 60 MHz mock UTMI clock plus an RPM vote
keeping the XO alive; the SS PHY takes its reference from the pads,
driven by the PMIC differential XO buffer (diff_clk), matching the
ref_clk the vendor kernel hands to the DWC3 wrapper.

Both PHYs must be described and initialized even for high-speed-only
use: leaving the SS PHY dead does not just cap the speed, it confuses
the upstream-facing state machine of at least the TUSB8040A hub on the
APQ8074 dragonboard, which then connects but never answers enumeration
in any speed configuration.

Assisted-by: Claude:claude-fable-5
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at oss.qualcomm.com>
---
 arch/arm/boot/dts/qcom/qcom-msm8974.dtsi | 47 ++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
index 06c0af0aa317..bac3c8772e0a 100644
--- a/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
@@ -713,6 +713,53 @@ blsp2_i2c6: i2c at f9968000 {
 			#size-cells = <0>;
 		};
 
+		usb3: usb at f9200000 {
+			compatible = "qcom,msm8974-dwc3", "qcom,snps-dwc3";
+			reg = <0xf9200000 0xfc000>;
+			interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 180 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "dwc_usb3", "pwr_event",
+					  "hs_phy_irq";
+			clocks = <&gcc GCC_SYS_NOC_USB3_AXI_CLK>,
+				 <&gcc GCC_USB30_MASTER_CLK>,
+				 <&gcc GCC_USB30_SLEEP_CLK>,
+				 <&gcc GCC_USB30_MOCK_UTMI_CLK>;
+			clock-names = "cfg_noc", "core", "sleep", "mock_utmi";
+			assigned-clocks = <&gcc GCC_USB30_MOCK_UTMI_CLK>,
+					  <&gcc GCC_USB30_MASTER_CLK>;
+			assigned-clock-rates = <60000000>, <125000000>;
+			resets = <&gcc GCC_USB_30_BCR>;
+			phys = <&usb3_hs_phy>, <&usb3_ss_phy>;
+			phy-names = "usb2-phy", "usb3-phy";
+			snps,dis_u2_susphy_quirk;
+			snps,dis_enblslpm_quirk;
+			status = "disabled";
+		};
+
+		usb3_hs_phy: phy at f92f8800 {
+			compatible = "qcom,msm8974-usb-phy-hs";
+			reg = <0xf92f8800 0x30>;
+			clocks = <&gcc GCC_USB30_MOCK_UTMI_CLK>,
+				 <&rpmcc RPM_SMD_XO_CLK_SRC>;
+			clock-names = "ref", "xo";
+			#phy-cells = <0>;
+			status = "disabled";
+		};
+
+		usb3_ss_phy: phy at f92f8830 {
+			compatible = "qcom,msm8974-usb-phy-ss",
+				     "qcom,ipq806x-usb-phy-ss";
+			reg = <0xf92f8830 0x30>;
+			clocks = <&gcc GCC_USB30_MASTER_CLK>,
+				 <&rpmcc RPM_SMD_DIFF_CLK>;
+			clock-names = "ref", "xo";
+			#phy-cells = <0>;
+			qcom,rx-eq = <3>;
+			qcom,tx-deamp-3_5db = <22>;
+			status = "disabled";
+		};
+
 		usb: usb at f9a55000 {
 			compatible = "qcom,ci-hdrc";
 			reg = <0xf9a55000 0x200>,

-- 
2.47.3