104 lines
4.3 KiB
Plaintext
104 lines
4.3 KiB
Plaintext
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Device tree binding for NVIDIA Tegra XUSB device mode controller (xUDC)
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============================
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The Tegra xUDC controller supports both USB 2.0 HighSpeed/FullSpeed and
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USB 3.0 SuperSpeed protocols.
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Required properties:
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--------------------
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- compatible: For Tegra186, must contain "nvidia,tegra186-xudc".
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For Tegra194, must contain "nvidia,tegra194-xudc".
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For Tegra210, must contain "nvidia,tegra210-xudc".
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For Tegra210b01, must contain "nvidia,tegra210b01-xudc".
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- reg: For Tegra210 and Tegra210b01, must contain the base and length of
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the xUDC device registers, xUDC FPCI registers and xUDC IPFS registers.
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For Tegra186 and Tegra194, must contain the base and length of the xUDC
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device registers, xUDC FPCI registers.
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- interrupts: Must be the xUDC device interrupt.
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- clocks: For Tegra186 and Tegra194, must contain the entries of "xusb_dev",
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"xusb_ss", "xusb_ss_src", and "xusb_fs_src".
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For Tegra210 and Tegra210b01, must contain the entries of "xusb_dev",
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"xusb_ss", "xusb_ssp_src", "xusb_hs_src", and "xusb_fs_src".
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See ../clock/clock-bindings.txt for details.
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- iommus: phandle and IOMMU specifier for the IOMMU that serves the XUSB
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device. See ../iommu/iommu.txt for details.
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Required properties for Tegra xudc:
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---------------------------------
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- nvidia,xusb-padctl: phandle to the XUSB pad controller that is used to
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configure the USB pads used by the XHCI controller.
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- phys: Must contain an entry for each entry in phy-names.
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See ../phy/phy-bindings.txt for details.
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- phy-names: Should include an entry for each PHY used by the controller.
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Names must be "usb2", and "usb3" if support SuperSpeed device mode.
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- "usb3" phy, SuperSpeed (SSTX+/SSTX-/SSRX+/SSRX-) data lines.
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- "usb2" phy, USB 2.0 (D+/D-) data lines.
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- extcon-cables: OTG support. Must contains an excon-cable entry which
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detects USB VBUS pin. See ../extcon/extcon-gpio-states.txt for details.
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When the extcon cable state is 1, OTG port will transition to device mode.
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- extcon-cable-names: Must be "vbus".
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For Tegra186:
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- avdd-usb-supply: USB controller power supply. Must supply 3.3 V.
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For Tegra210 and Tegra210b01:
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- hvdd_usb-supply: PEX USB 3.0 pads power supply. Must supply 1.8 V.
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- avddio-usb-supply: USB 2.0 pads power supply. Must supply 3.3 V.
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- avdd-pll-utmip-supply: UTMI PLL power supply. Must supply 1.8 V.
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Optional properties:
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--------------------
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- charger-detector: USB charger detection support. Must be the phandle of the
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USB charger detection driver DT node.
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- nvidia,boost_cpu_freq: The value to which CPU frequency is to be boosted.
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This is only the minimum frequency; DVFS can scale up CPU frequency further
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based on need and CPU load. CPU boost frequency through PMQOS is enabled
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for the xUDC controller only when this field’s value is greater than zero.
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The boost is applicable only to large bulk transfers on bulk endpoints;
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other endpoints do not need to be boosted.
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Example :
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Before boosting on Quill-prod:
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Output of "cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq"
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345600
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2419200
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2419200
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345600
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345600
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345600
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After boosting on QUill-prod: (nvidia,boost_cpu_freq = <800>)
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Output of "cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq"
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806400
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2419200
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2419200
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806400
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806400
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806400
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- emc-frequency: Set the value which EMC frequency will be requested.
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xUDC controller will request EMC bandwidth through BWMGR for Bulk transfers.
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Example:
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--------
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xudc@3550000 {
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compatible = "nvidia,tegra186-xudc";
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reg = <0x0 0x03550000 0x0 0x8000>,
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<0x0 0x03558000 0x0 0x1000>;
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interrupts = <0 166 0x4>;
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iommus = <&smmu TEGRA_SID_XUSB_DEV>;
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clocks = <&tegra_car TEGRA186_CLK_XUSB_CORE_DEV>,
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<&tegra_car TEGRA186_CLK_XUSB_SS>,
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<&tegra_car TEGRA186_CLK_XUSB_CORE_SS>,
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<&tegra_car TEGRA186_CLK_XUSB_FS>;
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nvidia,xusb-padctl = <&xusb_padctl>;
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phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-0}>, /* USB 3.0 micro-AB, J503 */
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<&{/xusb_padctl@3520000/pads/usb2/lanes/usb3-1}>; /* USB 3.0 micro-AB, J503 */
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phy-names = "usb2", "usb3";
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extcon-cables = <&vbus_id_extcon 0>;
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extcon-cable-names = "vbus";
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#extcon-cells = <1>;
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avdd-usb-supply = <&spmic_sd3_3v3>;
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charger-detector = <&tegra_usb_cd>;
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nvidia,boost_cpu_freq = <1200>;
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};
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