projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4215138e LP |
1 | * NXP PCA954x I2C bus switch |
| 2 | ||
| 3 | Required Properties: | |
| 4 | ||
| 5 | - compatible: Must contain one of the following. | |
| 6 | "nxp,pca9540", "nxp,pca9542", "nxp,pca9543", "nxp,pca9544", | |
| 7 | "nxp,pca9545", "nxp,pca9546", "nxp,pca9547", "nxp,pca9548" | |
| 8 | ||
| 9 | - reg: The I2C address of the device. | |
| 10 | ||
| 11 | The following required properties are defined externally: | |
| 12 | ||
| 13 | - Standard I2C mux properties. See i2c-mux.txt in this directory. | |
| 14 | - I2C child bus nodes. See i2c-mux.txt in this directory. | |
| 15 | ||
| 12097957 LP |
16 | Optional Properties: |
| 17 | ||
| 18 | - reset-gpios: Reference to the GPIO connected to the reset input. | |
| 72f02715 AS |
19 | - i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all |
| 20 | children in idle state. This is necessary for example, if there are several | |
| 21 | multiplexers on the bus and the devices behind them use same I2C addresses. | |
| 12097957 | 22 | |
| 4215138e LP |
23 | |
| 24 | Example: | |
| 25 | ||
| 26 | i2c-switch@74 { | |
| 27 | compatible = "nxp,pca9548"; | |
| 28 | #address-cells = <1>; | |
| 29 | #size-cells = <0>; | |
| 30 | reg = <0x74>; | |
| 31 | ||
| 32 | i2c@2 { | |
| 33 | #address-cells = <1>; | |
| 34 | #size-cells = <0>; | |
| 35 | reg = <2>; | |
| 36 | ||
| 37 | eeprom@54 { | |
| 38 | compatible = "at,24c08"; | |
| 39 | reg = <0x54>; | |
| 40 | }; | |
| 41 | }; | |
| 42 | ||
| 43 | i2c@4 { | |
| 44 | #address-cells = <1>; | |
| 45 | #size-cells = <0>; | |
| 46 | reg = <4>; | |
| 47 | ||
| 48 | rtc@51 { | |
| 49 | compatible = "nxp,pcf8563"; | |
| 50 | reg = <0x51>; | |
| 51 | }; | |
| 52 | }; | |
| 53 | }; |