mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 06:12:08 +00:00
4665743276
Add the LM36274 backlight driver with regulator support. This is a multi-function device for backlight applications. Backlight properties will be documented in it's a supplemental bindings document. Regulator support is documented in the regulator/lm363x-regulator.txt http://www.ti.com/lit/ds/symlink/lm36274.pdf Signed-off-by: Dan Murphy <dmurphy@ti.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
270 lines
5.9 KiB
Plaintext
270 lines
5.9 KiB
Plaintext
TI LMU (Lighting Management Unit) device tree bindings
|
|
|
|
TI LMU driver supports lighting devices below.
|
|
|
|
Name Child nodes
|
|
------ ---------------------------------
|
|
LM3631 Backlight and regulator
|
|
LM3632 Backlight and regulator
|
|
LM3633 Backlight, LED and fault monitor
|
|
LM3695 Backlight
|
|
LM36274 Backlight and regulator
|
|
|
|
Required properties:
|
|
- compatible: Should be one of:
|
|
"ti,lm3631"
|
|
"ti,lm3632"
|
|
"ti,lm3633"
|
|
"ti,lm3695"
|
|
"ti,lm36274"
|
|
- reg: I2C slave address.
|
|
0x11 for LM3632
|
|
0x29 for LM3631
|
|
0x36 for LM3633
|
|
0x63 for LM3695
|
|
0x11 for LM36274
|
|
|
|
Optional properties:
|
|
- enable-gpios: A GPIO specifier for hardware enable pin.
|
|
- ramp-up-us: Current ramping from one brightness level to
|
|
the a higher brightness level.
|
|
Range from 2048 us - 117.44 s
|
|
- ramp-down-us: Current ramping from one brightness level to
|
|
the a lower brightness level.
|
|
Range from 2048 us - 117.44 s
|
|
- ti,brightness-resolution - 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. This setting can either be in the parent
|
|
node or as part of the LED child nodes. This
|
|
is determined by the part itself if the strings
|
|
have a common brightness register or individual
|
|
brightness registers.
|
|
The values are 255 (8bit) or 2047 (11bit).
|
|
|
|
Required node:
|
|
- backlight: All LMU devices have backlight child nodes.
|
|
For the properties, please refer to [1].
|
|
|
|
Optional nodes:
|
|
- fault-monitor: Hardware fault monitoring driver for LM3633 and LM3697.
|
|
Required properties:
|
|
- compatible: Should be one of:
|
|
"ti,lm3633-fault-monitor"
|
|
- leds: LED properties for LM3633. Please refer to [2].
|
|
LED properties for LM36274. Please refer to [4].
|
|
- regulators: Regulator properties for LM3631 and LM3632.
|
|
Please refer to [3].
|
|
|
|
[1] ../leds/backlight/ti-lmu-backlight.txt
|
|
[2] ../leds/leds-lm3633.txt
|
|
[3] ../regulator/lm363x-regulator.txt
|
|
[4] ../leds/leds-lm36274.txt
|
|
|
|
lm3631@29 {
|
|
compatible = "ti,lm3631";
|
|
reg = <0x29>;
|
|
|
|
regulators {
|
|
compatible = "ti,lm363x-regulator";
|
|
|
|
vboost {
|
|
regulator-name = "lcd_boost";
|
|
regulator-min-microvolt = <4500000>;
|
|
regulator-max-microvolt = <6350000>;
|
|
regulator-always-on;
|
|
};
|
|
|
|
vcont {
|
|
regulator-name = "lcd_vcont";
|
|
regulator-min-microvolt = <1800000>;
|
|
regulator-max-microvolt = <3300000>;
|
|
};
|
|
|
|
voref {
|
|
regulator-name = "lcd_voref";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6000000>;
|
|
};
|
|
|
|
vpos {
|
|
regulator-name = "lcd_vpos";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6000000>;
|
|
regulator-boot-on;
|
|
};
|
|
|
|
vneg {
|
|
regulator-name = "lcd_vneg";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6000000>;
|
|
regulator-boot-on;
|
|
};
|
|
};
|
|
|
|
backlight {
|
|
compatible = "ti,lm3631-backlight";
|
|
|
|
lcd_bl {
|
|
led-sources = <0 1>;
|
|
ramp-up-us = <300000>;
|
|
};
|
|
};
|
|
};
|
|
|
|
lm3632@11 {
|
|
compatible = "ti,lm3632";
|
|
reg = <0x11>;
|
|
|
|
enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>; /* PC2 */
|
|
|
|
regulators {
|
|
compatible = "ti,lm363x-regulator";
|
|
|
|
enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
|
|
<&pioC 1 GPIO_ACTIVE_HIGH>;
|
|
|
|
vboost {
|
|
regulator-name = "lcd_boost";
|
|
regulator-min-microvolt = <4500000>;
|
|
regulator-max-microvolt = <6400000>;
|
|
regulator-always-on;
|
|
};
|
|
|
|
vpos {
|
|
regulator-name = "lcd_vpos";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6000000>;
|
|
};
|
|
|
|
vneg {
|
|
regulator-name = "lcd_vneg";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6000000>;
|
|
};
|
|
};
|
|
|
|
backlight {
|
|
compatible = "ti,lm3632-backlight";
|
|
|
|
pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
|
|
pwm-names = "lmu-backlight";
|
|
|
|
lcd {
|
|
led-sources = <0 1>;
|
|
pwm-period = <10000>;
|
|
};
|
|
};
|
|
};
|
|
|
|
lm3633@36 {
|
|
compatible = "ti,lm3633";
|
|
reg = <0x36>;
|
|
|
|
enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
|
|
|
|
backlight {
|
|
compatible = "ti,lm3633-backlight";
|
|
|
|
main {
|
|
label = "main_lcd";
|
|
led-sources = <1 2>;
|
|
ramp-up-us = <500000>;
|
|
ramp-down-us = <500000>;
|
|
};
|
|
|
|
front {
|
|
label = "front_lcd";
|
|
led-sources = <0>;
|
|
ramp-up-us = <1000000>;
|
|
ramp-down-us = <0>;
|
|
};
|
|
};
|
|
|
|
leds {
|
|
compatible = "ti,lm3633-leds";
|
|
|
|
chan1 {
|
|
label = "status";
|
|
led-sources = <1>;
|
|
led-max-microamp = <6000>;
|
|
};
|
|
|
|
chan345 {
|
|
label = "rgb";
|
|
led-sources = <3 4 5>;
|
|
led-max-microamp = <10000>;
|
|
};
|
|
};
|
|
|
|
fault-monitor {
|
|
compatible = "ti,lm3633-fault-monitor";
|
|
};
|
|
};
|
|
|
|
lm3695@63 {
|
|
compatible = "ti,lm3695";
|
|
reg = <0x63>;
|
|
|
|
enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
|
|
|
|
backlight {
|
|
compatible = "ti,lm3695-backlight";
|
|
|
|
lcd {
|
|
label = "bl";
|
|
led-sources = <0 1>;
|
|
};
|
|
};
|
|
};
|
|
|
|
lm36274@11 {
|
|
compatible = "ti,lm36274";
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
reg = <0x11>;
|
|
|
|
enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
|
|
regulators {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
compatible = "ti,lm363x-regulator";
|
|
|
|
enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
|
|
<&pioC 1 GPIO_ACTIVE_HIGH>;
|
|
|
|
vboost {
|
|
regulator-name = "lcd_boost";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <7150000>;
|
|
regulator-always-on;
|
|
};
|
|
|
|
vpos {
|
|
regulator-name = "lcd_vpos";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6500000>;
|
|
};
|
|
|
|
vneg {
|
|
regulator-name = "lcd_vneg";
|
|
regulator-min-microvolt = <4000000>;
|
|
regulator-max-microvolt = <6500000>;
|
|
};
|
|
};
|
|
|
|
backlight {
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
compatible = "ti,lm36274-backlight";
|
|
|
|
led@0 {
|
|
reg = <0>;
|
|
led-sources = <0 2>;
|
|
label = "white:backlight_cluster";
|
|
linux,default-trigger = "backlight";
|
|
};
|
|
};
|
|
};
|