Documentation / devicetree / bindings / mfd / ti-lmu.txt


Based on kernel version 6.10. Page generated on 2024-07-16 09:00 EST.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
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";
		};
	};
};