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1.. SPDX-License-Identifier: GPL-2.02 3==============4ACPI I2C Muxes5==============6 7Describing an I2C device hierarchy that includes I2C muxes requires an ACPI8Device () scope per mux channel.9 10Consider this topology::11 12 +------+ +------+13 | SMB1 |-->| MUX0 |--CH00--> i2c client A (0x50)14 | | | 0x70 |--CH01--> i2c client B (0x50)15 +------+ +------+16 17which corresponds to the following ASL::18 19 Device (SMB1)20 {21 Name (_HID, ...)22 Device (MUX0)23 {24 Name (_HID, ...)25 Name (_CRS, ResourceTemplate () {26 I2cSerialBus (0x70, ControllerInitiated, I2C_SPEED,27 AddressingMode7Bit, "^SMB1", 0x00,28 ResourceConsumer,,)29 }30 31 Device (CH00)32 {33 Name (_ADR, 0)34 35 Device (CLIA)36 {37 Name (_HID, ...)38 Name (_CRS, ResourceTemplate () {39 I2cSerialBus (0x50, ControllerInitiated, I2C_SPEED,40 AddressingMode7Bit, "^CH00", 0x00,41 ResourceConsumer,,)42 }43 }44 }45 46 Device (CH01)47 {48 Name (_ADR, 1)49 50 Device (CLIB)51 {52 Name (_HID, ...)53 Name (_CRS, ResourceTemplate () {54 I2cSerialBus (0x50, ControllerInitiated, I2C_SPEED,55 AddressingMode7Bit, "^CH01", 0x00,56 ResourceConsumer,,)57 }58 }59 }60 }61 }62