This patch describes overall binding for TI LMU MFD devices.
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Milo Kim <milo.kim@xxxxxx>
---
Documentation/devicetree/bindings/mfd/ti-lmu.txt | 282 +++++++++++++++++++++++
1 file changed, 282 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/ti-lmu.txt
diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
new file mode 100644
index 0000000..7ccf07e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
@@ -0,0 +1,282 @@
+TI LMU(Lighting Management Unit) device tree bindings
+
+TI LMU driver supports lighting devices belows.
+
+ Name Child nodes
+ ------ -------------------------
+ LM3532 Backlight
+ LM3631 Backlight and regulator
+ LM3632 Backlight and regulator
+ LM3633 Backlight, LED and HWMON
+ LM3695 Backlight
+ LM3697 Backlight and HWMON
+
+Required properties:
+ - compatible: Should be one of lists below.
+ "ti,lm3532"
+ "ti,lm3631"
+ "ti,lm3632"
+ "ti,lm3633"
+ "ti,lm3695"
+ "ti,lm3697"
+ - reg: I2C slave address.
+ 0x11 is LM3632
+ 0x29 is LM3631
+ 0x36 is LM3633, LM3697
+ 0x38 is LM3532
+ 0x63 is LM3695
+
+Optional properties:
+ - enable-gpios: A GPIO specifier for hardware enable pin.
+
+Required node:
+ - backlight: All LMU devices have backlight child nodes.
+ For the properties, please refer to [1].
+
+Optional nodes:
+ - hwmon: Hardware fault monitoring driver for LM3633 and LM3697.
+ For the property, please refer to [2].
+ - leds: LED properties for LM3633. Please refer to [3].
+ - regulators: Regulator properties for LM3631 and LM3632.
+ Please refer to [4].
+
+[1] Documentation/devicetree/bindings/video/backlight/ti-lmu-backlight.txt
+[2] Documentation/devicetree/bindings/hwm/ti-lmu-hwmon.txt
+[3] Documentation/devicetree/bindings/leds/leds-lm3633.txt
+[4] Documentation/devicetree/bindings/regulator/lm363x-regulator.txt
+
+Examples:
+
+LM3532 has a backlight device. External GPIO is used for enabling LM3532.
+
+lm3532@38 {
+ compatible = "ti,lm3532";
+ reg = <0x38>;
+
+ enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+
+ backlight {
+ compatible = "ti,lm3532-backlight";
+
+ lcd {
+ hvled1-used;
+ hvled2-used;
+ hvled3-used;
+
+ ramp-up-msec = <30>;
+ ramp-down-msec = <0>;
+
+ backlight-max-microamp = <5000>;
+ };
+ };
+};
+
+LM3631 has 5 regulators with one backlight device.
+
+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 {
+ backlight-name = "lcd_bl";
+ hvled1-used;
+ hvled2-used;
+
+ ramp-up-msec = <300>;
+ };
+ };
+};
+
+LM3632 has 3 regulators with one backlight device. External GPIO is
+used for enabling LM3632.
+
+lm3632@11 {
+ compatible = "ti,lm3632";
+ reg = <0x11>;
+
+ enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+
+ regulators {
+ compatible = "ti,lm363x-regulator";
+
+ ti,lcm-en1-gpio = <&pioC 0 GPIO_ACTIVE_HIGH>;
+ ti,lcm-en2-gpio = <&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";
+
+ lcd {
+ backlight-name = "lcd";
+ hvled1-used;
+ hvled2-used;
+ };
+ };
+};
+
+LM3633 has multiple backlight channels, LED channels and hardware fault
+monitoring driver. External GPIO is used for enabling LM3633.
+
+lm3633@36 {
+ compatible = "ti,lm3633";
+ reg = <0x36>;
+
+ enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+
+ backlight {
+ compatible = "ti,lm3633-backlight";
+
+ pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
+ pwm-names = "lmu-backlight";
+
+ main {
+ backlight-name = "main_lcd";
+ hvled2-used;
+ hvled3-used;
+ backlight-max-microamp = <20000>;
+
+ ramp-up-msec = <500>;
+ ramp-down-msec = <500>;
+ };
+
+ front {
+ backlight-name = "front_lcd";
+ hvled1-used;
+
+ ramp-up-msec = <1000>;
+ ramp-down-msec = <0>;
+
+ pwm-period = <10000>;
+ };
+ };
+
+ leds {
+ compatible = "ti,lm3633-leds";
+
+ chan2 {
+ channel-name = "status";
+ lvled2-used;
+ led-max-microamp = <6000>;
+ };
+
+ chan456 {
+ channel-name = "rgb";
+ lvled4-used;
+ lvled5-used;
+ lvled6-used;
+ };
+ };
+
+ hwmon {
+ compatible = "ti,lm3633-hwmon";
+ };
+};
+
+LM3695 is single backlight device.
+
+lm3695@63 {
+ compatible = "ti,lm3695";
+ reg = <0x63>;
+
+ backlight {
+ compatible = "ti,lm3695-backlight";
+
+ lcd {
+ hvled1-used;
+ hvled2-used;
+ backlight-max-microamp = <20000>;
+ };
+ };
+};
+
+LM3697 has one backlight device and hardware fault monitoring driver.
+External GPIO is used for enabling LM3697.
+
+lm3697@36 {
+ compatible = "ti,lm3697";
+ reg = <0x36>;
+
+ enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+
+ backlight {
+ compatible = "ti,lm3697-backlight";
+
+ pwms = <&pwm0 0 10000 0>; /* pwm number, period, polarity */
+ pwm-names = "lmu-backlight";
+
+ lcd {
+ backlight-name = "bl";
+ hvled1-used;
+ hvled2-used;
+ hvled3-used;
+ backlight-max-microamp = <20000>;
+
+ ramp-up-msec = <500>;
+ ramp-down-msec = <500>;
+ pwm-period = <10000>;
+ };
+ };
+
+ hwmon {
+ compatible = "ti,lm3697-hwmon";
+ };
+};
--
1.9.1
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