Hi Nikolaus,
On 07/19/2016 10:03 AM, H. Nikolaus Schaller wrote:
Signed-off-by: H. Nikolaus Schaller hns@goldelico.com
.../devicetree/bindings/leds/is31fl319x.txt | 56 ++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/is31fl319x.txt
diff --git a/Documentation/devicetree/bindings/leds/is31fl319x.txt b/Documentation/devicetree/bindings/leds/is31fl319x.txt new file mode 100644 index 0000000..c42c89c --- /dev/null +++ b/Documentation/devicetree/bindings/leds/is31fl319x.txt @@ -0,0 +1,56 @@ +LEDs connected to is31fl319x LED controller chip
+Required properties: +- compatible : Should be any of
- "issi,is31fl3190"
- "issi,is31fl3191"
- "issi,is31fl3193"
- "issi,is31fl3196"
- "issi,is31fl3199"
- "si-en,sn3199".
+- #address-cells: Must be 1. +- #size-cells: Must be 0. +- reg: 0x64, 0x65, 0x66, 0x67.
+Optional properties: +- audio-gain-db : audio gain selection for external analog modulation input.
- Valid values: 0 - 21, step by 3 (rounded down)
- Default: 0
+Each led is represented as a sub-node of the issi,is31fl319x device. +There can be less leds subnodes than the chip can support but not more.
+Required led sub-node properties: +- reg : number of LED line
- Valid values: 1 - number of leds supported by the chip variant.
+Optional led sub-node properties: +- label : see Documentation/devicetree/bindings/leds/common.txt. +- linux,default-trigger :
- see Documentation/devicetree/bindings/leds/common.txt.
+- led-max-microamp : (optional)
- Valid values: 5000 - 40000, step by 5000 (rounded down)
- Default: 20000 (20 mA)
- Note: a driver will take the lowest of all led limits since the
- chip has a single global setting.
I'd mention here that the lowest value will be chosen due to the PWM specificity, where lower brightness is achieved by reducing the frequency of pulses and not the current, which will always have its peak value equal to led-max-microamp.
+Examples:
+fancy_leds: leds@65 {
- compatible = "issi,is31fl3196";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x65>;
- red_aux: led@1 {
label = "red:aux";reg = <1>;led-max-microamp = <10000>;- };
- green_power: led@5 {
label = "green:power";reg = <5>;linux,default-trigger = "default-on";- };
+};