| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * NXP - pca955x LED driver |
| 2 | |
| 3 | The PCA955x family of chips are I2C LED blinkers whose pins not used |
| 4 | to control LEDs can be used as general purpose I/Os. The GPIO pins can |
| 5 | be input or output, and output pins can also be pulse-width controlled. |
| 6 | |
| 7 | Required properties: |
| 8 | - compatible : should be one of : |
| 9 | "nxp,pca9550" |
| 10 | "nxp,pca9551" |
| 11 | "nxp,pca9552" |
| 12 | "ibm,pca9552" |
| 13 | "nxp,pca9553" |
| 14 | - #address-cells: must be 1 |
| 15 | - #size-cells: must be 0 |
| 16 | - reg: I2C slave address. depends on the model. |
| 17 | |
| 18 | Optional properties: |
| 19 | - gpio-controller: allows pins to be used as GPIOs. |
| 20 | - #gpio-cells: must be 2. |
| 21 | - gpio-line-names: define the names of the GPIO lines |
| 22 | |
| 23 | LED sub-node properties: |
| 24 | - reg : number of LED line. |
| 25 | from 0 to 1 for the pca9550 |
| 26 | from 0 to 7 for the pca9551 |
| 27 | from 0 to 15 for the pca9552 |
| 28 | from 0 to 3 for the pca9553 |
| 29 | - type: (optional) either |
| 30 | PCA955X_TYPE_NONE |
| 31 | PCA955X_TYPE_LED |
| 32 | PCA955X_TYPE_GPIO |
| 33 | see dt-bindings/leds/leds-pca955x.h (default to LED) |
| 34 | - label : (optional) |
| 35 | see Documentation/devicetree/bindings/leds/common.txt |
| 36 | - linux,default-trigger : (optional) |
| 37 | see Documentation/devicetree/bindings/leds/common.txt |
| 38 | |
| 39 | Examples: |
| 40 | |
| 41 | pca9552: pca9552@60 { |
| 42 | compatible = "nxp,pca9552"; |
| 43 | #address-cells = <1>; |
| 44 | #size-cells = <0>; |
| 45 | reg = <0x60>; |
| 46 | |
| 47 | gpio-controller; |
| 48 | #gpio-cells = <2>; |
| 49 | gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15"; |
| 50 | |
| 51 | gpio@12 { |
| 52 | reg = <12>; |
| 53 | type = <PCA955X_TYPE_GPIO>; |
| 54 | }; |
| 55 | gpio@13 { |
| 56 | reg = <13>; |
| 57 | type = <PCA955X_TYPE_GPIO>; |
| 58 | }; |
| 59 | gpio@14 { |
| 60 | reg = <14>; |
| 61 | type = <PCA955X_TYPE_GPIO>; |
| 62 | }; |
| 63 | gpio@15 { |
| 64 | reg = <15>; |
| 65 | type = <PCA955X_TYPE_GPIO>; |
| 66 | }; |
| 67 | |
| 68 | led@0 { |
| 69 | label = "red:power"; |
| 70 | linux,default-trigger = "default-on"; |
| 71 | reg = <0>; |
| 72 | type = <PCA955X_TYPE_LED>; |
| 73 | }; |
| 74 | led@1 { |
| 75 | label = "green:power"; |
| 76 | reg = <1>; |
| 77 | type = <PCA955X_TYPE_LED>; |
| 78 | }; |
| 79 | led@2 { |
| 80 | label = "pca9552:yellow"; |
| 81 | reg = <2>; |
| 82 | type = <PCA955X_TYPE_LED>; |
| 83 | }; |
| 84 | led@3 { |
| 85 | label = "pca9552:white"; |
| 86 | reg = <3>; |
| 87 | type = <PCA955X_TYPE_LED>; |
| 88 | }; |
| 89 | }; |