Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) Device-tree bindings for I2C OPAL driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) ----------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Most of the device node and properties layout is specific to the firmware and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) used by the firmware itself for configuring the port. From the linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) perspective, the properties of use are "ibm,port-name" and "ibm,opal-id".
^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) - reg: Port-id within a given master
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) - compatible: must be "ibm,opal-i2c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) - ibm,opal-id: Refers to a specific bus and used to identify it when calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	       the relevant OPAL functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - bus-frequency: Operating frequency of the i2c bus (in HZ). Informational for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		 linux, used by the FW though.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) Optional properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) - ibm,port-name: Firmware provides this name that uniquely identifies the i2c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		 port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) The node contains a number of other properties that are used by the FW itself
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) and depend on the specific hardware implementation. The example below depicts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) a P8 on-chip bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) Example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) i2c-bus@0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	reg = <0x0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	bus-frequency = <0x61a80>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	compatible = "ibm,power8-i2c-port", "ibm,opal-i2c";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	ibm,opal-id = <0x1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	ibm,port-name = "p8_00000000_e1p0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	#address-cells = <0x1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	phandle = <0x10000006>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	#size-cells = <0x0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	linux,phandle = <0x10000006>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) };