arm64: dts: mediatek: mt8195: Add MTU3 nodes and correctly describe USB

The MT8195 SoC has four USB controllers: only one is a direct path to
a XHCI controller, while the other three (0, 2 and 3) are behind the
MTU3 DRD controller instead!

Add the missing MTU3 nodes, default disabled, for controllers 0, 2 and
3 and move the related XHCI nodes to be children of their MTU3 DRD to
correctly describe the SoC.

In order to retain USB functionality on all of the MT8195 and MT8395
boards, also move the vusb33 supply and enable the relevant MTU3 nodes
with special attention to the MT8195 Cherry Chromebook, where it was
necessary to set the dr_mode of all MTU3 controllers to host to avoid
interfering with the EC performing DRD on its own.

Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20240115084336.938426-1-angelogioacchino.delregno@collabora.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

1 files changed, 76 insertions, 49 deletions

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 4f3fcd8c287b..ea6dc220e1cc 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -1347,29 +1347,40 @@
 			};
 		};
 
-		xhci0: usb@11200000 {
-			compatible = "mediatek,mt8195-xhci",
-				     "mediatek,mtk-xhci";
-			reg = <0 0x11200000 0 0x1000>,
-			      <0 0x11203e00 0 0x0100>;
+		ssusb0: usb@11201000 {
+			compatible = "mediatek,mt8195-mtu3", "mediatek,mtu3";
+			reg = <0 0x11201000 0 0x2dff>, <0 0x11203e00 0 0x0100>;
 			reg-names = "mac", "ippc";
-			interrupts = <GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH 0>;
-			phys = <&u2port0 PHY_TYPE_USB2>,
-			       <&u3port0 PHY_TYPE_USB3>;
-			assigned-clocks = <&topckgen CLK_TOP_USB_TOP>,
-					  <&topckgen CLK_TOP_SSUSB_XHCI>;
-			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
-						 <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+			ranges = <0 0 0 0x11200000 0 0x3f00>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH 0>;
 			clocks = <&infracfg_ao CLK_INFRA_AO_SSUSB>,
 				 <&topckgen CLK_TOP_SSUSB_REF>,
-				 <&apmixedsys CLK_APMIXED_USB1PLL>,
-				 <&clk26m>,
 				 <&infracfg_ao CLK_INFRA_AO_SSUSB_XHCI>;
-			clock-names = "sys_ck", "ref_ck", "mcu_ck", "dma_ck",
-				      "xhci_ck";
-			mediatek,syscon-wakeup = <&pericfg 0x400 103>;
+			clock-names = "sys_ck", "ref_ck", "mcu_ck";
+			phys = <&u2port0 PHY_TYPE_USB2>, <&u3port0 PHY_TYPE_USB3>;
 			wakeup-source;
+			mediatek,syscon-wakeup = <&pericfg 0x400 103>;
 			status = "disabled";
+
+			xhci0: usb@0 {
+				compatible = "mediatek,mt8195-xhci", "mediatek,mtk-xhci";
+				reg = <0 0 0 0x1000>;
+				reg-names = "mac";
+				interrupts = <GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH 0>;
+				assigned-clocks = <&topckgen CLK_TOP_USB_TOP>,
+						  <&topckgen CLK_TOP_SSUSB_XHCI>;
+				assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
+							 <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+				clocks = <&infracfg_ao CLK_INFRA_AO_SSUSB>,
+					 <&topckgen CLK_TOP_SSUSB_REF>,
+					 <&apmixedsys CLK_APMIXED_USB1PLL>,
+					 <&clk26m>,
+					 <&infracfg_ao CLK_INFRA_AO_SSUSB_XHCI>;
+				clock-names = "sys_ck", "ref_ck", "mcu_ck", "dma_ck", "xhci_ck";
+				status = "disabled";
+			};
 		};
 
 		mmc0: mmc@11230000 {
@@ -1450,52 +1461,68 @@
 			status = "disabled";
 		};
 
-		xhci2: usb@112a0000 {
-			compatible = "mediatek,mt8195-xhci",
-				     "mediatek,mtk-xhci";
-			reg = <0 0x112a0000 0 0x1000>,
-			      <0 0x112a3e00 0 0x0100>;
+		ssusb2: usb@112a1000 {
+			compatible = "mediatek,mt8195-mtu3", "mediatek,mtu3";
+			reg = <0 0x112a1000 0 0x2dff>, <0 0x112a3e00 0 0x0100>;
 			reg-names = "mac", "ippc";
-			interrupts = <GIC_SPI 533 IRQ_TYPE_LEVEL_HIGH 0>;
-			phys = <&u2port2 PHY_TYPE_USB2>;
-			assigned-clocks = <&topckgen CLK_TOP_USB_TOP_2P>,
-					  <&topckgen CLK_TOP_SSUSB_XHCI_2P>;
-			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
-						 <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+			ranges = <0 0 0 0x112a0000 0 0x3f00>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			interrupts = <GIC_SPI 532 IRQ_TYPE_LEVEL_HIGH 0>;
+			assigned-clocks = <&topckgen CLK_TOP_USB_TOP_2P>;
+			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
 			clocks = <&pericfg_ao CLK_PERI_AO_SSUSB_2P_BUS>,
 				 <&topckgen CLK_TOP_SSUSB_P2_REF>,
-				 <&clk26m>,
-				 <&clk26m>,
 				 <&pericfg_ao CLK_PERI_AO_SSUSB_2P_XHCI>;
-			clock-names = "sys_ck", "ref_ck", "mcu_ck", "dma_ck",
-				      "xhci_ck";
-			mediatek,syscon-wakeup = <&pericfg 0x400 105>;
+			clock-names = "sys_ck", "ref_ck", "mcu_ck";
+			phys = <&u2port2 PHY_TYPE_USB2>;
 			wakeup-source;
+			mediatek,syscon-wakeup = <&pericfg 0x400 105>;
 			status = "disabled";
+
+			xhci2: usb@0 {
+				compatible = "mediatek,mt8195-xhci", "mediatek,mtk-xhci";
+				reg = <0 0 0 0x1000>;
+				reg-names = "mac";
+				interrupts = <GIC_SPI 533 IRQ_TYPE_LEVEL_HIGH 0>;
+				assigned-clocks = <&topckgen CLK_TOP_SSUSB_XHCI_2P>;
+				assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+				clocks = <&pericfg_ao CLK_PERI_AO_SSUSB_2P_XHCI>;
+				clock-names = "sys_ck";
+				status = "disabled";
+			};
 		};
 
-		xhci3: usb@112b0000 {
-			compatible = "mediatek,mt8195-xhci",
-				     "mediatek,mtk-xhci";
-			reg = <0 0x112b0000 0 0x1000>,
-			      <0 0x112b3e00 0 0x0100>;
+		ssusb3: usb@112b1000 {
+			compatible = "mediatek,mt8195-mtu3", "mediatek,mtu3";
+			reg = <0 0x112b1000 0 0x2dff>, <0 0x112b3e00 0 0x0100>;
 			reg-names = "mac", "ippc";
-			interrupts = <GIC_SPI 536 IRQ_TYPE_LEVEL_HIGH 0>;
-			phys = <&u2port3 PHY_TYPE_USB2>;
-			assigned-clocks = <&topckgen CLK_TOP_USB_TOP_3P>,
-					  <&topckgen CLK_TOP_SSUSB_XHCI_3P>;
-			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
-						 <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+			ranges = <0 0 0 0x112b0000 0 0x3f00>;
+			#address-cells = <2>;
+			#size-cells = <2>;
+			interrupts = <GIC_SPI 535 IRQ_TYPE_LEVEL_HIGH 0>;
+			assigned-clocks = <&topckgen CLK_TOP_USB_TOP_3P>;
+			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
 			clocks = <&pericfg_ao CLK_PERI_AO_SSUSB_3P_BUS>,
 				 <&topckgen CLK_TOP_SSUSB_P3_REF>,
-				 <&clk26m>,
-				 <&clk26m>,
 				 <&pericfg_ao CLK_PERI_AO_SSUSB_3P_XHCI>;
-			clock-names = "sys_ck", "ref_ck", "mcu_ck", "dma_ck",
-				      "xhci_ck";
-			mediatek,syscon-wakeup = <&pericfg 0x400 106>;
+			clock-names = "sys_ck", "ref_ck", "mcu_ck";
+			phys = <&u2port3 PHY_TYPE_USB2>;
 			wakeup-source;
+			mediatek,syscon-wakeup = <&pericfg 0x400 106>;
 			status = "disabled";
+
+			xhci3: usb@0 {
+				compatible = "mediatek,mt8195-xhci", "mediatek,mtk-xhci";
+				reg = <0 0 0 0x1000>;
+				reg-names = "mac";
+				interrupts = <GIC_SPI 536 IRQ_TYPE_LEVEL_HIGH 0>;
+				assigned-clocks = <&topckgen CLK_TOP_SSUSB_XHCI_3P>;
+				assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
+				clocks = <&pericfg_ao CLK_PERI_AO_SSUSB_3P_XHCI>;
+				clock-names = "sys_ck";
+				status = "disabled";
+			};
 		};
 
 		pcie0: pcie@112f0000 {