H. Nikolaus Schaller | e68015d | 2016-07-19 13:47:31 +0200 | [diff] [blame] | 1 | LEDs connected to is31fl319x LED controller chip |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible : Should be any of |
| 5 | "issi,is31fl3190" |
| 6 | "issi,is31fl3191" |
| 7 | "issi,is31fl3193" |
| 8 | "issi,is31fl3196" |
| 9 | "issi,is31fl3199" |
| 10 | "si-en,sn3199". |
| 11 | - #address-cells: Must be 1. |
| 12 | - #size-cells: Must be 0. |
| 13 | - reg: 0x64, 0x65, 0x66, or 0x67. |
| 14 | |
| 15 | Optional properties: |
| 16 | - audio-gain-db : audio gain selection for external analog modulation input. |
| 17 | Valid values: 0 - 21, step by 3 (rounded down) |
| 18 | Default: 0 |
| 19 | |
| 20 | Each led is represented as a sub-node of the issi,is31fl319x device. |
| 21 | There can be less leds subnodes than the chip can support but not more. |
| 22 | |
| 23 | Required led sub-node properties: |
| 24 | - reg : number of LED line |
| 25 | Valid values: 1 - number of leds supported by the chip variant. |
| 26 | |
| 27 | Optional led sub-node properties: |
| 28 | - label : see Documentation/devicetree/bindings/leds/common.txt. |
| 29 | - linux,default-trigger : |
| 30 | see Documentation/devicetree/bindings/leds/common.txt. |
| 31 | - led-max-microamp : (optional) |
| 32 | Valid values: 5000 - 40000, step by 5000 (rounded down) |
| 33 | Default: 20000 (20 mA) |
| 34 | Note: a driver will take the lowest of all led limits since the |
| 35 | chip has a single global setting. The lowest value will be chosen |
| 36 | due to the PWM specificity, where lower brightness is achieved |
| 37 | by reducing the dury-cycle of pulses and not the current, which |
| 38 | will always have its peak value equal to led-max-microamp. |
| 39 | |
| 40 | Examples: |
| 41 | |
| 42 | fancy_leds: leds@65 { |
| 43 | compatible = "issi,is31fl3196"; |
| 44 | #address-cells = <1>; |
| 45 | #size-cells = <0>; |
| 46 | reg = <0x65>; |
| 47 | |
| 48 | red_aux: led@1 { |
| 49 | label = "red:aux"; |
| 50 | reg = <1>; |
| 51 | led-max-microamp = <10000>; |
| 52 | }; |
| 53 | |
| 54 | green_power: led@5 { |
| 55 | label = "green:power"; |
| 56 | reg = <5>; |
| 57 | linux,default-trigger = "default-on"; |
| 58 | }; |
| 59 | }; |