David Venhoff
cfcea9ee67
Based off b80915eb99
and compacted into a single commit so that it will fit on the uni git server
59 lines
1.8 KiB
Plaintext
59 lines
1.8 KiB
Plaintext
Memory mapped SJA1000 CAN controller from NXP (formerly Philips)
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Required properties:
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- compatible : should be one of "nxp,sja1000", "technologic,sja1000".
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- reg : should specify the chip select, address offset and size required
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to map the registers of the SJA1000. The size is usually 0x80.
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- interrupts: property with a value describing the interrupt source
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(number and sensitivity) required for the SJA1000.
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Optional properties:
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- reg-io-width : Specify the size (in bytes) of the IO accesses that
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should be performed on the device. Valid value is 1, 2 or 4.
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This property is ignored for technologic version.
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Default to 1 (8 bits).
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- nxp,external-clock-frequency : Frequency of the external oscillator
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clock in Hz. Note that the internal clock frequency used by the
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SJA1000 is half of that value. If not specified, a default value
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of 16000000 (16 MHz) is used.
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- nxp,tx-output-mode : operation mode of the TX output control logic:
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<0x0> : bi-phase output mode
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<0x1> : normal output mode (default)
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<0x2> : test output mode
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<0x3> : clock output mode
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- nxp,tx-output-config : TX output pin configuration:
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<0x01> : TX0 invert
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<0x02> : TX0 pull-down (default)
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<0x04> : TX0 pull-up
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<0x06> : TX0 push-pull
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<0x08> : TX1 invert
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<0x10> : TX1 pull-down
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<0x20> : TX1 pull-up
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<0x30> : TX1 push-pull
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- nxp,clock-out-frequency : clock frequency in Hz on the CLKOUT pin.
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If not specified or if the specified value is 0, the CLKOUT pin
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will be disabled.
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- nxp,no-comparator-bypass : Allows to disable the CAN input comparator.
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For further information, please have a look to the SJA1000 data sheet.
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Examples:
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can@3,100 {
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compatible = "nxp,sja1000";
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reg = <3 0x100 0x80>;
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interrupts = <2 0>;
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interrupt-parent = <&mpic>;
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nxp,external-clock-frequency = <16000000>;
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};
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