71 lines
3.2 KiB
Plaintext
71 lines
3.2 KiB
Plaintext
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* UCC (Unified Communications Controllers)
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Required properties:
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- device_type : should be "network", "hldc", "uart", "transparent"
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"bisync", "atm", or "serial".
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- compatible : could be "ucc_geth" or "fsl_atm" and so on.
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- cell-index : the ucc number(1-8), corresponding to UCCx in UM.
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- reg : Offset and length of the register set for the device
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- interrupts : <a b> where a is the interrupt number and b is a
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field that represents an encoding of the sense and level
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information for the interrupt. This should be encoded based on
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the information in section 2) depending on the type of interrupt
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controller you have.
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- interrupt-parent : the phandle for the interrupt controller that
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services interrupts for this device.
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- pio-handle : The phandle for the Parallel I/O port configuration.
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- port-number : for UART drivers, the port number to use, between 0 and 3.
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This usually corresponds to the /dev/ttyQE device, e.g. <0> = /dev/ttyQE0.
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The port number is added to the minor number of the device. Unlike the
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CPM UART driver, the port-number is required for the QE UART driver.
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- soft-uart : for UART drivers, if specified this means the QE UART device
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driver should use "Soft-UART" mode, which is needed on some SOCs that have
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broken UART hardware. Soft-UART is provided via a microcode upload.
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- rx-clock-name: the UCC receive clock source
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"none": clock source is disabled
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"brg1" through "brg16": clock source is BRG1-BRG16, respectively
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"clk1" through "clk24": clock source is CLK1-CLK24, respectively
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- tx-clock-name: the UCC transmit clock source
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"none": clock source is disabled
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"brg1" through "brg16": clock source is BRG1-BRG16, respectively
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"clk1" through "clk24": clock source is CLK1-CLK24, respectively
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The following two properties are deprecated. rx-clock has been replaced
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with rx-clock-name, and tx-clock has been replaced with tx-clock-name.
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Drivers that currently use the deprecated properties should continue to
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do so, in order to support older device trees, but they should be updated
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to check for the new properties first.
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- rx-clock : represents the UCC receive clock source.
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0x00 : clock source is disabled;
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0x1~0x10 : clock source is BRG1~BRG16 respectively;
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0x11~0x28: clock source is QE_CLK1~QE_CLK24 respectively.
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- tx-clock: represents the UCC transmit clock source;
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0x00 : clock source is disabled;
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0x1~0x10 : clock source is BRG1~BRG16 respectively;
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0x11~0x28: clock source is QE_CLK1~QE_CLK24 respectively.
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Required properties for network device_type:
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- mac-address : list of bytes representing the ethernet address.
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- phy-handle : The phandle for the PHY connected to this controller.
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Recommended properties:
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- phy-connection-type : a string naming the controller/PHY interface type,
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i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id" (Internal
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Delay), "rgmii-txid" (delay on TX only), "rgmii-rxid" (delay on RX only),
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"tbi", or "rtbi".
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Example:
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ucc@2000 {
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device_type = "network";
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compatible = "ucc_geth";
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cell-index = <1>;
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reg = <2000 200>;
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interrupts = <a0 0>;
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interrupt-parent = <700>;
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mac-address = [ 00 04 9f 00 23 23 ];
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rx-clock = "none";
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tx-clock = "clk9";
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phy-handle = <212000>;
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phy-connection-type = "gmii";
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pio-handle = <140001>;
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};
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