linux-kernel - [PATCH 4.16 043/279] ARM64: dts: meson-gxm: add GXM specific USB host configuration

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Date:   Mon, 18 Jun 2018 10:10:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 043/279] ARM64: dts: meson-gxm: add GXM specific USB host configuration

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

[ Upstream commit 458baa95c86406c81c6ebac0a98d1689075a3ec4 ]

The USB configuration on GXM is slightly different than on GXL. The dwc3
controller's internal hub has three USB2 ports (instead of 2 on GXL)
along with a dedicated USB2 PHY for this port. However, it seems that
there are no pins on GXM which would allow connecting the third port to
a physical USB port.
Passing the third PHY is required though, because without it none of the
other USB ports is working (this seems to be a limitation of how the
internal USB hub works, if one PHY is disabled then no USB port works).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/boot/dts/amlogic/meson-gxm.dtsi |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/arch/arm64/boot/dts/amlogic/meson-gxm.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxm.dtsi
@@ -117,6 +117,19 @@
 	};
 };
 
+&apb {
+	usb2_phy2: phy@...40 {
+		compatible = "amlogic,meson-gxl-usb2-phy";
+		#phy-cells = <0>;
+		reg = <0x0 0x78040 0x0 0x20>;
+		clocks = <&clkc CLKID_USB>;
+		clock-names = "phy";
+		resets = <&reset RESET_USB_OTG>;
+		reset-names = "phy";
+		status = "okay";
+	};
+};
+
 &clkc_AO {
 	compatible = "amlogic,meson-gxm-aoclkc", "amlogic,meson-gx-aoclkc";
 };
@@ -137,3 +150,7 @@
 &hdmi_tx {
 	compatible = "amlogic,meson-gxm-dw-hdmi", "amlogic,meson-gx-dw-hdmi";
 };
+
+&dwc3 {
+	phys = <&usb3_phy>, <&usb2_phy0>, <&usb2_phy1>, <&usb2_phy2>;
+};