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Commit 478bb8f3 authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Lee Jones
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dt-bindings: mfd: Document first ROHM BD70528 bindings 



Document bindings for regulators (3 bucks, 3 LDOs and 2 LED
drivers) and 4 GPIO pins which can be configured for I/O or
as interrupt sources withe configurable trigger levels.

Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 0dae7f58

Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt

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* ROHM BD70528 Power Management Integrated Circuit bindings



BD70528MWV is an ultra-low quiescent current general purpose, single-chip,

power management IC for battery-powered portable devices. The IC

integrates 3 ultra-low current consumption buck converters, 3 LDOs and 2

LED Drivers. Also included are 4 GPIOs, a real-time clock (RTC), a 32kHz

clock gate, high-accuracy VREF for use with an external ADC, flexible

dual-input power path, 10 bit SAR ADC for battery temperature monitor and

1S battery charger with scalable charge currents.



Required properties:

 - compatible		: Should be "rohm,bd70528"

 - reg			: I2C slave address.

 - interrupts		: The interrupt line the device is connected to.

 - interrupt-controller	: To indicate BD70528 acts as an interrupt controller.

 - #interrupt-cells	: Should be 2. Usage is compliant to the 2 cells

			  variant of ../interrupt-controller/interrupts.txt

 - gpio-controller	: To indicate BD70528 acts as a GPIO controller.

 - #gpio-cells		: Should be 2. The first cell is the pin number and

			  the second cell is used to specify flags. See

			  ../gpio/gpio.txt for more information.

 - #clock-cells		: Should be 0.

 - regulators:		: List of child nodes that specify the regulators.

			  Please see ../regulator/rohm,bd70528-regulator.txt



Optional properties:

 - clock-output-names	: Should contain name for output clock.



Example:

/* External oscillator */

osc: oscillator {

	compatible = "fixed-clock";

	#clock-cells = <1>;

	clock-frequency  = <32768>;

	clock-output-names = "osc";

};



pmic: pmic@4b {

	compatible = "rohm,bd70528";

	reg = <0x4b>;

	interrupt-parent = <&gpio1>;

	interrupts = <29 GPIO_ACTIVE_LOW>;

	clocks = <&osc 0>;

	#clock-cells = <0>;

	clock-output-names = "bd70528-32k-out";

	#gpio-cells = <2>;

	gpio-controller;

	interrupt-controller;

	#interrupt-cells = <2>;



	regulators {

		buck1: BUCK1 {

			regulator-name = "buck1";

			regulator-min-microvolt = <1200000>;

			regulator-max-microvolt = <3400000>;

			regulator-boot-on;

			regulator-ramp-delay = <125>;

		};

		buck2: BUCK2 {

			regulator-name = "buck2";

			regulator-min-microvolt = <1200000>;

			regulator-max-microvolt = <3300000>;

			regulator-boot-on;

			regulator-ramp-delay = <125>;

		};

		buck3: BUCK3 {

			regulator-name = "buck3";

			regulator-min-microvolt = <800000>;

			regulator-max-microvolt = <1800000>;

			regulator-boot-on;

			regulator-ramp-delay = <250>;

		};

		ldo1: LDO1 {

			regulator-name = "ldo1";

			regulator-min-microvolt = <1650000>;

			regulator-max-microvolt = <3300000>;

			regulator-boot-on;

		};

		ldo2: LDO2 {

			regulator-name = "ldo2";

			regulator-min-microvolt = <1650000>;

			regulator-max-microvolt = <3300000>;

			regulator-boot-on;

		};



		ldo3: LDO3 {

			regulator-name = "ldo3";

			regulator-min-microvolt = <1650000>;

			regulator-max-microvolt = <3300000>;

		};

		led_ldo1: LED_LDO1 {

			regulator-name = "led_ldo1";

			regulator-min-microvolt = <200000>;

			regulator-max-microvolt = <300000>;

		};

		led_ldo2: LED_LDO2 {

			regulator-name = "led_ldo2";

			regulator-min-microvolt = <200000>;

			regulator-max-microvolt = <300000>;

		};

	};

};