| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Liebherr's BK4 controller external SPI |
| 2 | |
| 3 | A device which handles data acquisition from compatible industrial |
| 4 | peripherals. |
| 5 | The SPI is used for data and management purposes in both master and |
| 6 | slave modes. |
| 7 | |
| 8 | Required properties: |
| 9 | |
| 10 | - compatible : Should be "lwn,bk4" |
| 11 | |
| 12 | Required SPI properties: |
| 13 | |
| 14 | - reg : Should be address of the device chip select within |
| 15 | the controller. |
| 16 | |
| 17 | - spi-max-frequency : Maximum SPI clocking speed of device in Hz, should be |
| 18 | 30MHz at most for the Liebherr's BK4 external bus. |
| 19 | |
| 20 | Example: |
| 21 | |
| 22 | spidev0: spi@0 { |
| 23 | compatible = "lwn,bk4"; |
| 24 | spi-max-frequency = <30000000>; |
| 25 | reg = <0>; |
| 26 | }; |