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Message-ID: <20190325142403.30447-4-dmurphy@ti.com>
Date: Mon, 25 Mar 2019 09:24:01 -0500
From: Dan Murphy <dmurphy@...com>
To: <robh+dt@...nel.org>, <jacek.anaszewski@...il.com>, <pavel@....cz>
CC: <linux-kernel@...r.kernel.org>, <linux-leds@...r.kernel.org>,
Dan Murphy <dmurphy@...com>
Subject: [PATCH 3/5] dt-bindings: ti-lmu: Modify dt bindings for the LM3697
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@...com>
---
.../devicetree/bindings/leds/leds-lm3697.txt | 77 +++++++++++++++++++
.../devicetree/bindings/mfd/ti-lmu.txt | 26 +------
2 files changed, 78 insertions(+), 25 deletions(-)
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..a780f11acd38
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
@@ -0,0 +1,77 @@
+* 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:
+ - max_brightness - This determines whether to use 8 bit brightness mode
+ or 11 bit brightness mode. If this value is not
+ set the device is defaulted to the preferred 8bit
+ brightness mode per 7.3.4.1 of the data sheet.
+ The values are 255 (8bit) or 2047 (11bit).
+ - 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>;
+ max_brightness = <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>;
+ max_brightness = <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
diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
index d9d529de6dc1..4b2dc0ccfe26 100644
--- a/Documentation/devicetree/bindings/mfd/ti-lmu.txt
+++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
@@ -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:
@@ -41,7 +39,6 @@ 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].
@@ -206,24 +203,3 @@ lm3695@63 {
};
};
};
-
-lm3697@36 {
- compatible = "ti,lm3697";
- reg = <0x36>;
-
- enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
-
- backlight {
- compatible = "ti,lm3697-backlight";
-
- lcd {
- led-sources = <0 1 2>;
- ramp-up-ms = <200>;
- ramp-down-ms = <200>;
- };
- };
-
- fault-monitor {
- compatible = "ti,lm3697-fault-monitor";
- };
-};
--
2.19.0
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