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Message-ID: <1d2bc596-0329-d090-2e8d-037c8cad0585@ti.com>
Date: Thu, 17 Oct 2019 09:18:15 -0500
From: Dan Murphy <dmurphy@...com>
To: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
<mazziesaccount@...il.com>
CC: Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
Jacek Anaszewski <jacek.anaszewski@...il.com>,
Pavel Machek <pavel@....cz>,
Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-clk@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
<linux-leds@...r.kernel.org>, <linux-rtc@...r.kernel.org>
Subject: Re: [RFC PATCH 12/13] dt-bindings: mfd: Document ROHM BD71282
bindings
Matt
On 10/17/19 4:55 AM, Matti Vaittinen wrote:
> ROHM BD71828 Power management IC integrates 7 buck converters, 7 LDOs,
> a real-time clock (RTC), 3 GPO/regulator control pins, HALL input pin
> and a 32.768 kHz clock gate.
>
> Document the dt bindings drivers are using.
This should be patch 1 of X
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> ---
> .../bindings/mfd/rohm,bd71828-pmic.txt | 180 ++++++++++++++++++
> 1 file changed, 180 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd71828-pmic.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd71828-pmic.txt b/Documentation/devicetree/bindings/mfd/rohm,bd71828-pmic.txt
> new file mode 100644
> index 000000000000..125efa9f3de0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/rohm,bd71828-pmic.txt
> @@ -0,0 +1,180 @@
> +* ROHM BD71828 Power Management Integrated Circuit bindings
> +
> +BD71828GW is a single-chip power management IC for battery-powered portable
> +devices. The IC integrates 7 buck converters, 7 LDOs, and a 1500 mA single-cell
> +linear charger. Also included is a Coulomb counter, a real-time clock (RTC),
> +and a 32.768 kHz clock gate.
> +
> +Required properties:
> + - compatible : Should be "rohm,bd71828".
> + - reg : I2C slave address.
> + - interrupt-parent : Phandle to the parent interrupt controller.
> + - interrupts : The interrupt line the device is connected to.
> + - clocks : The parent clock connected to PMIC.
> + - #clock-cells : Should be 0.
> + - regulators : List of child nodes that specify the
> + regulators. Please see
> + ../regulator/rohm,bd71828-regulator.txt
> + - gpio-controller : To indicate BD71828 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.
> +
> +The BD71828 RUN state is divided into 4 configurable run-levels named RUN0,
> +RUN1, RUN2 and RUN3. Bucks 1, 2, 6 and 7 can be either controlled individually
> +via I2C, or some/all of them can be bound to run-levels and controlled as a
> +group. If bucks are controlled individually these run-levels are ignored. See
> +../regulator/rohm,bd71828-regulator.txt for how to define regulator voltages
> +for run-levels. Run-levels can be changed by I2C or GPIO depending on PMIC's OTP
> +configuration.
> +
> +Optional properties:
> +- clock-output-names : Should contain name for output clock.
> +- rohm,dvs-vsel-gpios : GPIOs used to control PMIC run-levels. Should
> + describe two GPIOs. (See run-level control in
> + data-sheet). If this property is omitted but
> + some bucks are marked to be controlled by
> + run-levels - then OTP option allowing
> + run-level control via I2C is assumed.
> +- gpio-reserved-ranges : Usage of GPIO pins can be changed via OTP.
> + This property can be used to mark the pins
> + which should not be configured for GPIO.
> + Please see the ../gpio/gpio.txt for more
> + information.
> +
> +Example:
> +
> + /* external oscillator node */
> + osc: oscillator {
> + compatible = "fixed-clock";
> + #clock-cells = <1>;
> + clock-frequency = <32768>;
> + clock-output-names = "osc";
> + };
> +
> + pmic: pmic@4b {
> + compatible = "rohm,bd71828";
> + reg = <0x4b>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <29 GPIO_ACTIVE_LOW>;
> + clocks = <&osc 0>;
> + #clock-cells = <0>;
> + clock-output-names = "bd71828-32k-out";
> + gpio-controller;
> + #gpio-cells = <2>;
> + ngpios = <4>;
> + gpio-reserved-ranges = <0 1 2 1>;
> + gpio-line-names = "EPDEN";
> + rohm,dvs-vsel-gpios = <&gpio1 12 0>,
> + <&gpio1 13 0>;
> + regulators {
> + buck1: BUCK1 {
> + regulator-name = "buck1";
> + regulator-min-microvolt = <500000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-ramp-delay = <2500>;
> + rohm,dvs-runlvl-ctrl;
> + rohm,dvs-runlevel0-voltage = <500000>;
> + rohm,dvs-runlevel1-voltage = <506250>;
> + rohm,dvs-runlevel2-voltage = <512500>;
> + rohm,dvs-runlevel3-voltage = <518750>;
> + regulator-boot-on;
> + };
> + buck2: BUCK2 {
> + regulator-name = "buck2";
> + regulator-min-microvolt = <500000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-ramp-delay = <2500>;
> + rohm,dvs-runlvl-ctrl;
> + rohm,dvs-runlevel0-voltage = <500000>;
> + rohm,dvs-runlevel1-voltage = <506250>;
> + rohm,dvs-runlevel2-voltage = <512500>;
> + rohm,dvs-runlevel3-voltage = <518750>;
> + regulator-boot-on;
> + };
> + buck3: BUCK3 {
> + regulator-name = "buck3";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-boot-on;
> + };
> + buck4: BUCK4 {
> + regulator-name = "buck4";
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-boot-on;
> + };
> + buck5: BUCK5 {
> + regulator-name = "buck5";
> + regulator-min-microvolt = <2500000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + buck6: BUCK6 {
> + regulator-name = "buck6";
> + regulator-min-microvolt = <500000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-ramp-delay = <2500>;
> + rohm,dvs-runlvl-ctrl;
> + rohm,dvs-runlevel0-voltage = <500000>;
> + rohm,dvs-runlevel1-voltage = <506250>;
> + rohm,dvs-runlevel2-voltage = <512500>;
> + rohm,dvs-runlevel3-voltage = <518750>;
> + regulator-boot-on;
> + };
> + buck7: BUCK7 {
> + regulator-name = "buck7";
> + regulator-min-microvolt = <500000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-ramp-delay = <2500>;
> + rohm,dvs-runlvl-ctrl;
> + rohm,dvs-runlevel0-voltage = <500000>;
> + rohm,dvs-runlevel1-voltage = <506250>;
> + rohm,dvs-runlevel2-voltage = <512500>;
> + rohm,dvs-runlevel3-voltage = <518750>;
> + regulator-boot-on;
> + };
> + ldo1: LDO1 {
> + regulator-name = "ldo1";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + ldo2: LDO2 {
> + regulator-name = "ldo2";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + ldo3: LDO3 {
> + regulator-name = "ldo3";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + ldo4: LDO4 {
> + regulator-name = "ldo4";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + ldo5: LDO5 {
> + regulator-name = "ldo5";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + ldo6: LDO6 {
> + regulator-name = "ldo6";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-boot-on;
> + };
> + ldo7_reg: LDO7 {
> + regulator-name = "ldo7";
> + regulator-min-microvolt = <800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + };
> + };
> + };
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