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Message-ID: <20180815161734.18159-1-dmurphy@ti.com>
Date: Wed, 15 Aug 2018 11:17:33 -0500
From: Dan Murphy <dmurphy@...com>
To: <robh+dt@...nel.org>, <jacek.anaszewski@...il.com>, <pavel@....cz>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-leds@...r.kernel.org>, Dan Murphy <dmurphy@...com>
Subject: [PATCH v3 1/2] dt-bindings: leds: Add bindings for lm3697 driver
Add the device tree bindings for the lm3697
LED driver for backlighting and display.
Signed-off-by: Dan Murphy <dmurphy@...com>
---
v3 - Updated subject with prefered title - https://lore.kernel.org/patchwork/patch/972337/
v2 - Fixed subject and patch commit message - https://lore.kernel.org/patchwork/patch/971326/
.../devicetree/bindings/leds/leds-lm3697.txt | 89 +++++++++++++++++++
1 file changed, 89 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-lm3697.txt
diff --git a/Documentation/devicetree/bindings/leds/leds-lm3697.txt b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
new file mode 100644
index 000000000000..34403a48a0ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
@@ -0,0 +1,89 @@
+* 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,lm3967"
+ - 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. The HVLED string cannot be associated with
+ two control banks. This property is an array of 3 and
+ all positions in the array must be populated.
+ Additional information is contained
+ in Documentation/devicetree/bindings/leds/common.txt
+ 0 - End of array if all 3 LEDs are not declared for a
+ single control bank.
+ 1 - HVLED 1 string
+ 2 - HVLED 2 string
+ 3 - HVLED 3 string
+
+Optional child properties:
+ - label : see Documentation/devicetree/bindings/leds/common.txt
+ - linux,default-trigger :
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+HVLED string 1 and 2 controlled by control bank A and HVLED string controlled by
+control bank B.
+
+led-controller@36 {
+ compatible = "ti,lm3967";
+ reg = <0x36>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vbatt>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0x1 0x2 0x0>;
+ label = "white:first_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+
+ led@1 {
+ reg = <1>;
+ led-sources = <0x3 0x0 0x0>;
+ label = "white:second_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+}
+
+All HVLED strings controlled by control bank A
+
+led-controller@36 {
+ compatible = "ti,lm3967";
+ reg = <0x36>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vbatt>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0x1 0x2 0x3>;
+ label = "white:backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+}
+
+For more product information please see the link below:
+http://www.ti.com/lit/ds/symlink/lm3697.pdf
--
2.17.0.582.gccdcbd54c
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