On Mon, Apr 18, 2016 at 08:43:16PM +0200, H. Nikolaus Schaller wrote:
This is a driver for the Integrated Silicon Solution Inc. LED driver chips IS31FL3196 and IS31FL3199. They can drive up to 6 or 9 LEDs.
Each LED is individually controllable in brightness (through pwm) in 256 steps so that RGB LEDs can show any of ca. 16 Mio colors.
The maximum current of the LEDs can be programmed and limited to 5 .. 40mA through a device tree property.
The chip is connected through I2C and can have one of 4 addresses (0x64 .. 0x67) depending on how the AD pin is connected. The address is defined by the reg property as usual.
The chip also has a shutdown input which could be connected to a GPIO, but this driver uses software shutdown if all LEDs are inactivated.
The chip also has breathing and audio features which are not supported by this driver.
This driver was developed and tested on OMAP5 based Pyra handheld prototype.
Signed-off-by: H. Nikolaus Schaller hns@goldelico.com
.../devicetree/bindings/leds/is31fl319x.txt | 41 +++ drivers/leds/Kconfig | 8 + drivers/leds/Makefile | 1 + drivers/leds/leds-is31fl319x.c | 406 +++++++++++++++++++++ include/linux/leds-is31fl319x.h | 24 ++ 5 files changed, 480 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/is31fl319x.txt create mode 100644 drivers/leds/leds-is31fl319x.c create mode 100644 include/linux/leds-is31fl319x.h
diff --git a/Documentation/devicetree/bindings/leds/is31fl319x.txt b/Documentation/devicetree/bindings/leds/is31fl319x.txt new file mode 100644 index 0000000..d13c7ca --- /dev/null +++ b/Documentation/devicetree/bindings/leds/is31fl319x.txt @@ -0,0 +1,41 @@ +LEDs connected to is31fl319x RGB LED controller chip
+Required properties: +- compatible : should be : "issi,is31fl3196" or "issi,is31fl3199".
One per line please.
+- #address-cells: must be 1 +- #size-cells: must be 0 +- reg: 0x64, 0x65, 0x66, 0x67.
+Optional properties: +- max-current-ma: maximum led current (5..40 mA, default 20 mA)
Use standard property led-max-microamp.
+- audio-gain-db: audio gain selection (0..21 dB. default 0 dB) +- breathing & audio: not implemented
+Each led is represented as a sub-node of the issi,is31fl319x device.
+LED sub-node properties: +- label : (optional) see Documentation/devicetree/bindings/leds/common.txt +- reg : number of LED line (0 to 5 or 0 to 8 - not all need to be present) +- linux,default-trigger : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
+Examples:
+fancy_leds: is31fl3196@65 {
- compatible = "issi,is31fl319x";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x65>;
- led0: red-aux@0 {
Use generic unit names:
red-aux: led@0
label = "red:aux";reg = <0>;- };
- led1: green-power@4 {
ditto
label = "green:power";reg = <4>;linux,default-trigger = "default-on";- };
+};