Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) * Liebherr's BK4 controller external SPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) A device which handles data acquisition from compatible industrial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) peripherals.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) The SPI is used for data and management purposes in both master and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) slave modes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) Required properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) - compatible : Should be "lwn,bk4"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) Required SPI properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - reg : Should be address of the device chip select within
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)   the controller.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) - spi-max-frequency : Maximum SPI clocking speed of device in Hz, should be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)   30MHz at most for the Liebherr's BK4 external bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) spidev0: spi@0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	compatible = "lwn,bk4";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	spi-max-frequency = <30000000>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	reg = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };