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dt-bindings: ti-lmu: Modify dt bindings for the LM3697

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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>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Dan Murphy 2019-05-06 14:16:12 -05:00 committed by Jacek Anaszewski
parent 3fce8e1eb9
commit 1372bbe66a
2 changed files with 74 additions and 26 deletions
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73
Documentation/devicetree/bindings/leds/leds-lm3697.txt Normal file
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@ -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-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
- ramp-down-us: 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-us = <5000>;
ramp-down-us = <1000>;
label = "white:first_backlight_cluster";
linux,default-trigger = "backlight";
};
led@1 {
reg = <1>;
led-sources = <1>;
ti,brightness-resolution = <255>;
ramp-up-us = <500>;
ramp-down-us = <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

27
Documentation/devicetree/bindings/mfd/ti-lmu.txt
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@ -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 properties:
@ -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-us = <200000>;
ramp-down-us = <200000>;
};
};
fault-monitor {
compatible = "ti,lm3697-fault-monitor";
};
};