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74 lines
1.9 KiB
74 lines
1.9 KiB
* NXP PCA954x I2C bus switch |
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The driver supports NXP PCA954x and PCA984x I2C mux/switch devices. |
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Required Properties: |
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- compatible: Must contain one of the following. |
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"nxp,pca9540", |
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"nxp,pca9542", |
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"nxp,pca9543", |
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"nxp,pca9544", |
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"nxp,pca9545", |
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"nxp,pca9546", "nxp,pca9846", |
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"nxp,pca9547", "nxp,pca9847", |
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"nxp,pca9548", "nxp,pca9848", |
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"nxp,pca9849" |
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- reg: The I2C address of the device. |
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The following required properties are defined externally: |
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- Standard I2C mux properties. See i2c-mux.txt in this directory. |
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- I2C child bus nodes. See i2c-mux.txt in this directory. |
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Optional Properties: |
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- reset-gpios: Reference to the GPIO connected to the reset input. |
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- idle-state: if present, overrides i2c-mux-idle-disconnect, |
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Please refer to Documentation/devicetree/bindings/mux/mux-controller.txt |
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- i2c-mux-idle-disconnect: Boolean; if defined, forces mux to disconnect all |
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children in idle state. This is necessary for example, if there are several |
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multiplexers on the bus and the devices behind them use same I2C addresses. |
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- interrupts: Interrupt mapping for IRQ. |
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- interrupt-controller: Marks the device node as an interrupt controller. |
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- #interrupt-cells : Should be two. |
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- first cell is the pin number |
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- second cell is used to specify flags. |
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See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt |
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Example: |
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i2c-switch@74 { |
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compatible = "nxp,pca9548"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <0x74>; |
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interrupt-parent = <&ipic>; |
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interrupts = <17 IRQ_TYPE_LEVEL_LOW>; |
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interrupt-controller; |
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#interrupt-cells = <2>; |
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i2c@2 { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <2>; |
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eeprom@54 { |
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compatible = "atmel,24c08"; |
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reg = <0x54>; |
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}; |
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}; |
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i2c@4 { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <4>; |
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rtc@51 { |
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compatible = "nxp,pcf8563"; |
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reg = <0x51>; |
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}; |
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}; |
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};
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