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89 lines
1.9 KiB
89 lines
1.9 KiB
* NXP - pca955x LED driver |
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The PCA955x family of chips are I2C LED blinkers whose pins not used |
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to control LEDs can be used as general purpose I/Os. The GPIO pins can |
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be input or output, and output pins can also be pulse-width controlled. |
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Required properties: |
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- compatible : should be one of : |
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"nxp,pca9550" |
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"nxp,pca9551" |
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"nxp,pca9552" |
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"ibm,pca9552" |
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"nxp,pca9553" |
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- #address-cells: must be 1 |
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- #size-cells: must be 0 |
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- reg: I2C slave address. depends on the model. |
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Optional properties: |
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- gpio-controller: allows pins to be used as GPIOs. |
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- #gpio-cells: must be 2. |
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- gpio-line-names: define the names of the GPIO lines |
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LED sub-node properties: |
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- reg : number of LED line. |
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from 0 to 1 for the pca9550 |
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from 0 to 7 for the pca9551 |
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from 0 to 15 for the pca9552 |
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from 0 to 3 for the pca9553 |
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- type: (optional) either |
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PCA955X_TYPE_NONE |
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PCA955X_TYPE_LED |
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PCA955X_TYPE_GPIO |
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see dt-bindings/leds/leds-pca955x.h (default to LED) |
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- label : (optional) |
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see Documentation/devicetree/bindings/leds/common.txt |
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- linux,default-trigger : (optional) |
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see Documentation/devicetree/bindings/leds/common.txt |
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Examples: |
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pca9552: pca9552@60 { |
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compatible = "nxp,pca9552"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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reg = <0x60>; |
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gpio-controller; |
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#gpio-cells = <2>; |
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gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15"; |
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gpio@12 { |
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reg = <12>; |
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type = <PCA955X_TYPE_GPIO>; |
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}; |
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gpio@13 { |
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reg = <13>; |
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type = <PCA955X_TYPE_GPIO>; |
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}; |
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gpio@14 { |
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reg = <14>; |
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type = <PCA955X_TYPE_GPIO>; |
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}; |
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gpio@15 { |
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reg = <15>; |
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type = <PCA955X_TYPE_GPIO>; |
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}; |
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led@0 { |
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label = "red:power"; |
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linux,default-trigger = "default-on"; |
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reg = <0>; |
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type = <PCA955X_TYPE_LED>; |
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}; |
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led@1 { |
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label = "green:power"; |
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reg = <1>; |
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type = <PCA955X_TYPE_LED>; |
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}; |
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led@2 { |
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label = "pca9552:yellow"; |
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reg = <2>; |
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type = <PCA955X_TYPE_LED>; |
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}; |
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led@3 { |
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label = "pca9552:white"; |
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reg = <3>; |
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type = <PCA955X_TYPE_LED>; |
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}; |
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};
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