linux-kernel - [PATCH 2/7] arm64: dts: allwinner: a523: add third usb2 phy

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Message-ID: <20250816084700.569524-3-iuncuim@gmail.com>
Date: Sat, 16 Aug 2025 16:46:55 +0800
From: iuncuim <iuncuim@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Andre Przywara <andre.przywara@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-phy@...ts.infradead.org,
	linux-clk@...r.kernel.org,
	linux-sunxi@...ts.linux.dev
Subject: [PATCH 2/7] arm64: dts: allwinner: a523: add third usb2 phy

From: Mikhail Kalashnikov <iuncuim@...il.com>

It seems that there are actually three usb2 phys in the processor, which
makes it incompatible with D1.
The third phy is used together with USB3/PCIe combophy with DWC3
controller. In the BSP code, the third PHY requires a separate glue
driver, but it seems that it is not needed.
According to the BSP code, the third phy does not have a reset line; the
only reset is declared in the DWC3 node, but none of this is documented.
Since sun4i-usb-phy driver requires a reset, I added RST_BUS_3 here.

Signed-off-by: Mikhail Kalashnikov <iuncuim@...il.com>
---
 .../arm64/boot/dts/allwinner/sun55i-a523.dtsi | 21 ++++++++++++-------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
index 6b6f2296b..e4ed4fa82 100644
--- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi
@@ -503,22 +503,27 @@ usb_otg: usb@...0000 {
 		};
 
 		usbphy: phy@...0400 {
-			compatible = "allwinner,sun55i-a523-usb-phy",
-				     "allwinner,sun20i-d1-usb-phy";
+			compatible = "allwinner,sun55i-a523-usb-phy";
 			reg = <0x4100400 0x100>,
 			      <0x4101800 0x100>,
-			      <0x4200800 0x100>;
+			      <0x4200800 0x100>,
+				  <0x4e00000 0x100>;
 			reg-names = "phy_ctrl",
 				    "pmu0",
-				    "pmu1";
+				    "pmu1",
+					"pmu2";
 			clocks = <&osc24M>,
-				 <&osc24M>;
+				 <&osc24M>,
+				 <&ccu CLK_USB2>;
 			clock-names = "usb0_phy",
-				      "usb1_phy";
+				      "usb1_phy",
+					  "usb2_phy";
 			resets = <&ccu RST_USB_PHY0>,
-				 <&ccu RST_USB_PHY1>;
+				 <&ccu RST_USB_PHY1>,
+				 <&ccu RST_BUS_3>;
 			reset-names = "usb0_reset",
-				      "usb1_reset";
+				      "usb1_reset",
+					  "usb2_reset";
 			status = "disabled";
 			#phy-cells = <1>;
 		};
-- 
2.50.1