50 lines
1.3 KiB
Plaintext
50 lines
1.3 KiB
Plaintext
*NXP - pca9532 PWM LED Driver
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The PCA9532 family is SMBus I/O expander optimized for dimming LEDs.
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The PWM support 256 steps.
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Required properties:
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- compatible:
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"nxp,pca9530"
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"nxp,pca9531"
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"nxp,pca9532"
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"nxp,pca9533"
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- reg - I2C slave address
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Each led is represented as a sub-node of the nxp,pca9530.
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Optional sub-node properties:
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- label: see Documentation/devicetree/bindings/leds/common.txt
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- type: Output configuration, see dt-bindings/leds/leds-pca9532.h (default NONE)
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- linux,default-trigger: see Documentation/devicetree/bindings/leds/common.txt
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- default-state: see Documentation/devicetree/bindings/leds/common.txt
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This property is only valid for sub-nodes of type <PCA9532_TYPE_LED>.
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Example:
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#include <dt-bindings/leds/leds-pca9532.h>
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leds: pca9530@60 {
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compatible = "nxp,pca9530";
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reg = <0x60>;
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red-power {
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label = "pca:red:power";
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type = <PCA9532_TYPE_LED>;
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};
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green-power {
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label = "pca:green:power";
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type = <PCA9532_TYPE_LED>;
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};
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kernel-booting {
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type = <PCA9532_TYPE_LED>;
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default-state = "on";
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};
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sys-stat {
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type = <PCA9532_TYPE_LED>;
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default-state = "keep"; // don't touch, was set by U-Boot
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};
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};
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For more product information please see the link below:
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http://nxp.com/documents/data_sheet/PCA9532.pdf
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