| Wolfgang Grandegger | 959d20b | 2010-01-07 09:43:08 +0000 | [diff] [blame] | 1 | CAN Device Tree Bindings |
| 2 | ------------------------ |
| 3 | |
| 4 | (c) 2006-2009 Secret Lab Technologies Ltd |
| 5 | Grant Likely <grant.likely@secretlab.ca> |
| 6 | |
| 7 | fsl,mpc5200-mscan nodes |
| 8 | ----------------------- |
| 9 | In addition to the required compatible-, reg- and interrupt-properties, you can |
| 10 | also specify which clock source shall be used for the controller: |
| 11 | |
| 12 | - fsl,mscan-clock-source : a string describing the clock source. Valid values |
| 13 | are: "ip" for ip bus clock |
| 14 | "ref" for reference clock (XTAL) |
| 15 | "ref" is default in case this property is not |
| 16 | present. |
| 17 | |
| 18 | fsl,mpc5121-mscan nodes |
| 19 | ----------------------- |
| 20 | In addition to the required compatible-, reg- and interrupt-properties, you can |
| 21 | also specify which clock source and divider shall be used for the controller: |
| 22 | |
| 23 | - fsl,mscan-clock-source : a string describing the clock source. Valid values |
| 24 | are: "ip" for ip bus clock |
| 25 | "ref" for reference clock |
| 26 | "sys" for system clock |
| 27 | If this property is not present, an optimal CAN |
| 28 | clock source and frequency based on the system |
| 29 | clock will be selected. If this is not possible, |
| 30 | the reference clock will be used. |
| 31 | |
| 32 | - fsl,mscan-clock-divider: for the reference and system clock, an additional |
| 33 | clock divider can be specified. By default, a |
| 34 | value of 1 is used. |
| 35 | |
| 36 | Note that the MPC5121 Rev. 1 processor is not supported. |
| 37 | |
| 38 | Examples: |
| 39 | can@1300 { |
| 40 | compatible = "fsl,mpc5121-mscan"; |
| 41 | interrupts = <12 0x8>; |
| 42 | interrupt-parent = <&ipic>; |
| 43 | reg = <0x1300 0x80>; |
| 44 | }; |
| 45 | |
| 46 | can@1380 { |
| 47 | compatible = "fsl,mpc5121-mscan"; |
| 48 | interrupts = <13 0x8>; |
| 49 | interrupt-parent = <&ipic>; |
| 50 | reg = <0x1380 0x80>; |
| 51 | fsl,mscan-clock-source = "ref"; |
| 52 | fsl,mscan-clock-divider = <3>; |
| 53 | }; |