new file mode 100644
@@ -0,0 +1,73 @@
+* Texas Instruments - LM3697 Highly Efficient White LED Driver
+
+The LM3697 11-bit LED driver provides high-
+performance backlight dimming for 1, 2, or 3 series
+LED strings while delivering up to 90% efficiency.
+
+This device is suitable for display and keypad Lighting
+
+Required properties:
+ - compatible:
+ "ti,lm3697"
+ - reg : I2C slave address
+ - #address-cells : 1
+ - #size-cells : 0
+
+Optional properties:
+ - enable-gpios : GPIO pin to enable/disable the device
+ - vled-supply : LED supply
+
+Required child properties:
+ - reg : 0 - LED is Controlled by bank A
+ 1 - LED is Controlled by bank B
+ - led-sources : Indicates which HVLED string is associated to which
+ control bank. This is a zero based property so
+ HVLED1 = 0, HVLED2 = 1, HVLED3 = 2.
+ Additional information is contained
+ in Documentation/devicetree/bindings/leds/common.txt
+
+Optional child properties:
+ - ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - ramp-up-ms: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - ramp-down-ms: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - label : see Documentation/devicetree/bindings/leds/common.txt
+ - linux,default-trigger :
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is
+controlled by control bank B.
+
+led-controller@36 {
+ compatible = "ti,lm3697";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x36>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vbatt>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 2>;
+ ti,brightness-resolution = <2047>;
+ ramp-up-ms = <5000>;
+ ramp-down-ms = <1000>;
+ label = "white:first_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+
+ led@1 {
+ reg = <1>;
+ led-sources = <1>;
+ ti,brightness-resolution = <255>;
+ ramp-up-ms = <500>;
+ ramp-down-ms = <1000>;
+ label = "white:second_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+}
+
+For more product information please see the link below:
+http://www.ti.com/lit/ds/symlink/lm3697.pdf
@@ -8,7 +8,6 @@ TI LMU driver supports lighting devices below.
LM3632 Backlight and regulator
LM3633 Backlight, LED and fault monitor
LM3695 Backlight
- LM3697 Backlight and fault monitor
Required properties:
- compatible: Should be one of:
@@ -16,11 +15,10 @@ Required properties:
"ti,lm3632"
"ti,lm3633"
"ti,lm3695"
- "ti,lm3697"
- reg: I2C slave address.
0x11 for LM3632
0x29 for LM3631
- 0x36 for LM3633, LM3697
+ 0x36 for LM3633
0x63 for LM3695
Optional property:
@@ -51,7 +49,6 @@ Optional nodes:
Required properties:
- compatible: Should be one of:
"ti,lm3633-fault-monitor"
- "ti,lm3697-fault-monitor"
- leds: LED properties for LM3633. Please refer to [2].
- regulators: Regulator properties for LM3631 and LM3632.
Please refer to [3].
@@ -216,25 +213,3 @@ lm3695@63 {
};
};
};
-
-lm3697@36 {
- compatible = "ti,lm3697";
- reg = <0x36>;
-
- enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
-
- backlight {
- compatible = "ti,lm3697-backlight";
-
- lcd {
- ti,brightness-resolution = <255>;
- led-sources = <0 1 2>;
- ramp-up-ms = <200>;
- ramp-down-ms = <200>;
- };
- };
-
- fault-monitor {
- compatible = "ti,lm3697-fault-monitor";
- };
-};
The LM3697 is a single function LED driver. The single function LED driver needs to reside in the LED directory as a dedicated LED driver and not as a MFD device. The device does have common brightness and ramp features and those can be accomodated by a TI LMU framework. The LM3697 dt binding needs to be moved from the ti-lmu.txt and a dedicated LED dt binding needs to be added. The new LM3697 LED dt binding will then reside in the Documentation/devicetree/bindings/leds directory and follow the current LED and general bindings guidelines. Signed-off-by: Dan Murphy <dmurphy@ti.com> --- v2 - Made changes to reference ti,brightness-resolution to the ti-lmu.txt - https://lore.kernel.org/patchwork/patch/1054501/ .../devicetree/bindings/leds/leds-lm3697.txt | 73 +++++++++++++++++++ .../devicetree/bindings/mfd/ti-lmu.txt | 27 +------ 2 files changed, 74 insertions(+), 26 deletions(-) create mode 100644 Documentation/devicetree/bindings/leds/leds-lm3697.txt -- 2.19.0