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From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: matthias.bgg@gmail.com
Cc: robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org,
	conor+dt@kernel.org,
	devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org,
	wenst@chromium.org,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
	kernel@collabora.com
Subject: [PATCH] arm64: dts: mediatek: mt8195: Add MTU3 nodes and correctly describe USB
Date: Mon, 15 Jan 2024 09:43:36 +0100
Message-ID: <20240115084336.938426-1-angelogioacchino.delregno@collabora.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

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.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---

Depends on [1]

This patch was tested on a MT8395 board and on the MT8195 Cherry
Tomato Chromebook.

[1]: https://lore.kernel.org/all/20240112133222.240038-1-angelogioacchino.delregno@collabora.com

 .../boot/dts/mediatek/mt8195-cherry.dtsi      |  26 +++-
 arch/arm64/boot/dts/mediatek/mt8195-demo.dts  |  18 ++-
 arch/arm64/boot/dts/mediatek/mt8195-evb.dts   |  12 ++
 arch/arm64/boot/dts/mediatek/mt8195.dtsi      | 125 +++++++++++-------
 .../dts/mediatek/mt8395-genio-1200-evk.dts    |  17 ++-
 5 files changed, 140 insertions(+), 58 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index a136bea99d9c..e563a2dc4cce 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -1293,11 +1293,32 @@ &uart0 {
 	status = "okay";
 };
 
+/*
+ * For the USB Type-C ports the role and alternate modes switching is
+ * done by the EC so we set dr_mode to host to avoid interfering.
+ */
+&ssusb0 {
+	dr_mode = "host";
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb2 {
+	dr_mode = "host";
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb3 {
+	dr_mode = "host";
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
 &xhci0 {
 	status = "okay";
 
 	rx-fifo-depth = <3072>;
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	vbus-supply = <&usb_vbus>;
 };
 
@@ -1311,8 +1332,6 @@ &xhci1 {
 
 &xhci2 {
 	status = "okay";
-
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	vbus-supply = <&usb_vbus>;
 };
 
@@ -1321,7 +1340,6 @@ &xhci3 {
 
 	/* MT7921's USB Bluetooth has issues with USB2 LPM */
 	usb2-lpm-disable;
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	vbus-supply = <&usb_vbus>;
 };
 
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-demo.dts b/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
index 69c7f3954ae5..9872743f743f 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
@@ -528,8 +528,22 @@ &u3phy3 {
 	status = "okay";
 };
 
-&xhci0 {
+&ssusb0 {
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb2 {
 	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb3 {
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&xhci0 {
 	vbus-supply = <&otg_vbus_regulator>;
 	status = "okay";
 };
@@ -540,11 +554,9 @@ &xhci1 {
 };
 
 &xhci2 {
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	status = "okay";
 };
 
 &xhci3 {
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-evb.dts b/arch/arm64/boot/dts/mediatek/mt8195-evb.dts
index 690dc7717f2c..341b6e074139 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-evb.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-evb.dts
@@ -160,6 +160,18 @@ &uart0 {
 	status = "okay";
 };
 
+&ssusb0 {
+	status = "okay";
+};
+
+&ssusb2 {
+	status = "okay";
+};
+
+&ssusb3 {
+	status = "okay";
+};
+
 &xhci0 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 152cc0b191bb..45f278efd946 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -1349,29 +1349,40 @@ queue3 {
 			};
 		};
 
-		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 {
@@ -1452,52 +1463,68 @@ xhci1: usb@11290000 {
 			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 {
diff --git a/arch/arm64/boot/dts/mediatek/mt8395-genio-1200-evk.dts b/arch/arm64/boot/dts/mediatek/mt8395-genio-1200-evk.dts
index 7fc515a07c65..1558649f633c 100644
--- a/arch/arm64/boot/dts/mediatek/mt8395-genio-1200-evk.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8395-genio-1200-evk.dts
@@ -880,6 +880,21 @@ &ufsphy {
 	status = "disabled";
 };
 
+&ssusb0 {
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb2 {
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
+&ssusb3 {
+	vusb33-supply = <&mt6359_vusb_ldo_reg>;
+	status = "okay";
+};
+
 &xhci0 {
 	status = "okay";
 };
@@ -890,11 +905,9 @@ &xhci1 {
 };
 
 &xhci2 {
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	status = "okay";
 };
 
 &xhci3 {
-	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	status = "okay";
 };
-- 
2.43.0