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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: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matti Vaittinen 2019-06-03 10:26:12 +03:00 committed by Lee Jones
parent 0dae7f5857
commit 478bb8f32e
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Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt Normal file
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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>;
};
};
};