60 lines
2.3 KiB
Plaintext
60 lines
2.3 KiB
Plaintext
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MAXIM MAX16984 CDP PHY binding
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============================================
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This binding describes a MAX16984 device that is used to provide CDP (charging
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downstream port) support on Tegra USB host mode port, on Tegra platform.
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Required properties (controller (parent) node):
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- compatible : Should be "maxim,max16984-tegra186-cdp-phy" for tegra186 platforms,
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should be "maxim,max16984-tegra210-cdp-phy" for tegra210 platforms.
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- #phy-cells : Should be 1
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Optional properties (controller (parent) node) for tegra186 platforms:
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- max,cdp-port0-cd0-gpio : GPIO phandle for UTMI port 0 CD0 pin
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- max,cdp-port0-cd1-gpio : GPIO phandle for UTMI port 0 CD1 pin
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- max,cdp-port1-cd0-gpio : GPIO phandle for UTMI port 1 CD0 pin
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- max,cdp-port1-cd1-gpio : GPIO phandle for UTMI port 1 CD1 pin
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- max,cdp-port2-cd0-gpio : GPIO phandle for UTMI port 2 CD0 pin
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- max,cdp-port2-cd1-gpio : GPIO phandle for UTMI port 2 CD1 pin
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Optional properties (controller (parent) node) for tegra210 platforms:
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- max,cdp-port0-cd0-gpio : GPIO phandle for UTMI port 0 CD0 pin
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- max,cdp-port0-cd1-gpio : GPIO phandle for UTMI port 0 CD1 pin
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- max,cdp-port1-cd0-gpio : GPIO phandle for UTMI port 1 CD0 pin
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- max,cdp-port1-cd1-gpio : GPIO phandle for UTMI port 1 CD1 pin
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- max,cdp-port2-cd0-gpio : GPIO phandle for UTMI port 2 CD0 pin
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- max,cdp-port2-cd1-gpio : GPIO phandle for UTMI port 2 CD1 pin
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- max,cdp-port3-cd0-gpio : GPIO phandle for UTMI port 3 CD0 pin
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- max,cdp-port3-cd1-gpio : GPIO phandle for UTMI port 3 CD1 pin
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Note that CD1 pin are not used by now. CD0 gpio should be specified for a port
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to actually provide the CDP function, or it's equivalent to no-op.
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Example:
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tegra_ext_cdp: max16984-cdp {
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compatible = "maxim,max16984-tegra186-cdp-phy";
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#phy-cells = <1>;
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max,cdp-port0-cd0-gpio = <&tegra_gpio TEGRA_GPIO(J, 7) GPIO_ACTIVE_HIGH>;
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max,cdp-port2-cd0-gpio = <&tegra_gpio TEGRA_GPIO(K, 0) GPIO_ACTIVE_HIGH>;
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};
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Specifying phy control of devices
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=================================
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USB host controller device nodes can specify this phy as "cdp-0", "cdp-1",
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"cdp-2" or "cdp-3" PHYs for UTMI port 0, 1, 2 or 3.
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Example:
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xhci@3530000 {
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...
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phys = ...
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<&tegra_ext_cdp 0>,
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<&tegra_ext_cdp 2>;
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phy-names = ...
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"cdp-0", "cdp-2";
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...
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};
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