Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) Common i2c bus multiplexer/switch properties.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) An i2c bus multiplexer/switch will have several child busses that are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) numbered uniquely in a device dependent manner.  The nodes for an i2c bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) multiplexer/switch will have one child node for each child bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) Optional properties:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) - #address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)    This property is required if the i2c-mux child node does not exist.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) - #size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)    This property is required if the i2c-mux child node does not exist.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - i2c-mux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)    For i2c multiplexers/switches that have child nodes that are a mixture
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)    of both i2c child busses and other child nodes, the 'i2c-mux' subnode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)    can be used for populating the i2c child busses.  If an 'i2c-mux'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)    subnode is present, only subnodes of this will be considered as i2c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)    child busses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) Required properties for the i2c-mux child node:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) - #address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) - #size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) Required properties for i2c child bus nodes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) - #address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) - #size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) - reg : The sub-bus number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) Optional properties for i2c child bus nodes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) - Other properties specific to the multiplexer/switch hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) - Child nodes conforming to i2c bus binding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) Example :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	   An NXP pca9548 8 channel I2C multiplexer at address 0x70
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	   with two NXP pca8574 GPIO expanders attached, one each to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	   ports 3 and 4.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	mux@70 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		compatible = "nxp,pca9548";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		reg = <0x70>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		#address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		#size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		i2c@3 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			#address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			#size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			reg = <3>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			gpio1: gpio@38 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 				compatible = "nxp,pca8574";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 				reg = <0x38>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 				#gpio-cells = <2>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 				gpio-controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 			};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		i2c@4 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			#address-cells = <1>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			#size-cells = <0>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			reg = <4>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 			gpio2: gpio@38 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 				compatible = "nxp,pca8574";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 				reg = <0x38>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 				#gpio-cells = <2>;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 				gpio-controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 			};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	};