Wolfgang Grandegger | d1a277c | 2009-05-30 07:55:50 +0000 | [diff] [blame] | 1 | Memory mapped SJA1000 CAN controller from NXP (formerly Philips) |
| 2 | |
| 3 | Required properties: |
| 4 | |
| 5 | - compatible : should be "nxp,sja1000". |
| 6 | |
| 7 | - reg : should specify the chip select, address offset and size required |
| 8 | to map the registers of the SJA1000. The size is usually 0x80. |
| 9 | |
| 10 | - interrupts: property with a value describing the interrupt source |
| 11 | (number and sensitivity) required for the SJA1000. |
| 12 | |
| 13 | Optional properties: |
| 14 | |
| 15 | - nxp,external-clock-frequency : Frequency of the external oscillator |
| 16 | clock in Hz. Note that the internal clock frequency used by the |
| 17 | SJA1000 is half of that value. If not specified, a default value |
| 18 | of 16000000 (16 MHz) is used. |
| 19 | |
| 20 | - nxp,tx-output-mode : operation mode of the TX output control logic: |
| 21 | <0x0> : bi-phase output mode |
| 22 | <0x1> : normal output mode (default) |
| 23 | <0x2> : test output mode |
| 24 | <0x3> : clock output mode |
| 25 | |
| 26 | - nxp,tx-output-config : TX output pin configuration: |
| 27 | <0x01> : TX0 invert |
| 28 | <0x02> : TX0 pull-down (default) |
| 29 | <0x04> : TX0 pull-up |
| 30 | <0x06> : TX0 push-pull |
| 31 | <0x08> : TX1 invert |
| 32 | <0x10> : TX1 pull-down |
| 33 | <0x20> : TX1 pull-up |
| 34 | <0x30> : TX1 push-pull |
| 35 | |
| 36 | - nxp,clock-out-frequency : clock frequency in Hz on the CLKOUT pin. |
| 37 | If not specified or if the specified value is 0, the CLKOUT pin |
| 38 | will be disabled. |
| 39 | |
| 40 | - nxp,no-comparator-bypass : Allows to disable the CAN input comperator. |
| 41 | |
| 42 | For futher information, please have a look to the SJA1000 data sheet. |
| 43 | |
| 44 | Examples: |
| 45 | |
| 46 | can@3,100 { |
| 47 | compatible = "nxp,sja1000"; |
| 48 | reg = <3 0x100 0x80>; |
| 49 | interrupts = <2 0>; |
| 50 | interrupt-parent = <&mpic>; |
| 51 | nxp,external-clock-frequency = <16000000>; |
| 52 | }; |
| 53 | |