From: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
To: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
balbi-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ@public.gmane.org,
Martin Blumenstingl
<martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Subject: [PATCH usb-next v2 1/3] dt-bindings: usb: add support for dwc3 controller on Amlogic Meson GX
Date: Sun, 11 Feb 2018 22:15:15 +0100 [thread overview]
Message-ID: <20180211211517.5846-2-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20180211211517.5846-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Amlogic Meson GX SoCs (GXL and AXG) come with a (host-only) dwc3 USB
controller. This requires a clock to be enabled and a reset line to be
pulsed to get the hardware into a known state.
Add the documentation for this IP block, similar to "qcom,dwc3.txt".
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Reviewed-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Tested-by: Yixun Lan <yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ@public.gmane.org>
---
.../devicetree/bindings/usb/amlogic,dwc3.txt | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
diff --git a/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
new file mode 100644
index 000000000000..9a8b631904fd
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/amlogic,dwc3.txt
@@ -0,0 +1,42 @@
+Amlogic Meson GX DWC3 USB SoC controller
+
+Required properties:
+- compatible: depending on the SoC this should contain one of:
+ * amlogic,meson-axg-dwc3
+ * amlogic,meson-gxl-dwc3
+- clocks: a handle for the "USB general" clock
+- clock-names: must be "usb_general"
+- resets: a handle for the shared "USB OTG" reset line
+- reset-names: must be "usb_otg"
+
+Required child node:
+A child node must exist to represent the core DWC3 IP block. The name of
+the node is not important. The content of the node is defined in dwc3.txt.
+
+PHY documentation is provided in the following places:
+- Documentation/devicetree/bindings/phy/meson-gxl-usb2-phy.txt
+- Documentation/devicetree/bindings/phy/meson-gxl-usb3-phy.txt
+
+Example device nodes:
+ usb0: usb@ff500000 {
+ compatible = "amlogic,meson-axg-dwc3";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ clocks = <&clkc CLKID_USB>;
+ clock-names = "usb_general";
+ resets = <&reset RESET_USB_OTG>;
+ reset-names = "usb_otg";
+
+ dwc3: dwc3@ff500000 {
+ compatible = "snps,dwc3";
+ reg = <0x0 0xff500000 0x0 0x100000>;
+ interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
+ dr_mode = "host";
+ maximum-speed = "high-speed";
+ snps,dis_u2_susphy_quirk;
+ phys = <&usb3_phy>, <&usb2_phy0>;
+ phy-names = "usb2-phy", "usb3-phy";
+ };
+ };
--
2.16.1
--
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next prev parent reply other threads:[~2018-02-11 21:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-11 21:15 [PATCH usb-next v2 0/3] DWC3 support for Amlogic Meson AXG and GXL SoCs Martin Blumenstingl
[not found] ` <20180211211517.5846-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2018-02-11 21:15 ` Martin Blumenstingl [this message]
2018-02-11 21:15 ` [PATCH usb-next v2 2/3] usb: dwc3: of-simple: add support for shared and pulsed reset lines Martin Blumenstingl
2018-02-11 21:15 ` [PATCH usb-next v2 3/3] usb: dwc3: of-simple: add support for the Amlogic Meson GXL and AXG SoCs Martin Blumenstingl
2018-02-20 22:39 ` [PATCH usb-next v2 0/3] DWC3 support for Amlogic Meson AXG and GXL SoCs Martin Blumenstingl
2018-03-03 21:50 ` Martin Blumenstingl
2018-03-08 8:49 ` Felipe Balbi
2018-03-07 13:13 ` Neil Armstrong
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