ROHM BD96801 is a highly configurable automotive grade PMIC. Introduce DT bindings for the BD96801 core. Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx> Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> --- Revision history: v2 =>: - No changes v1 => v2: - use lowercase node names in example - minor addition to ERRB use-cases RFCv2 => v1 - minor cleaning - add timeout-sec RFCv1 => RFCv2: - Document rohm,hw-timeout-ms - Document rohm,wdg-action --- .../bindings/mfd/rohm,bd96801-pmic.yaml | 173 ++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml b/Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml new file mode 100644 index 000000000000..d381125a0a15 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml @@ -0,0 +1,173 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/rohm,bd96801-pmic.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ROHM BD96801 Scalable Power Management Integrated Circuit + +maintainers: + - Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx> + +description: + BD96801 is an automotive grade single-chip power management IC. + It integrates 4 buck converters and 3 LDOs with safety features like + over-/under voltage and over current detection and a watchdog. + +properties: + compatible: + const: rohm,bd96801 + + reg: + maxItems: 1 + + interrupts: + description: + The PMIC provides intb and errb IRQ lines. The errb IRQ line is used + for fatal IRQs which will cause the PMIC to shut down power outputs. + In many systems this will shut down the SoC contolling the PMIC and + connecting/handling the errb can be omitted. However, there are cases + where the SoC is not powered by the PMIC or has a short time backup + energy to handle shutdown of critical hardware. In that case it may be + useful to connect the errb and handle errb events. + minItems: 1 + maxItems: 2 + + interrupt-names: + minItems: 1 + items: + - enum: [intb, errb] + - const: errb + + rohm,hw-timeout-ms: + description: + Watchdog timeout value(s). First walue is timeout limit. Second value is + optional value for 'too early' watchdog ping if window timeout mode is + to be used. + minItems: 1 + maxItems: 2 + + rohm,wdg-action: + description: + Whether the watchdog failure must turn off the regulator power outputs or + just toggle the INTB line. + enum: + - prstb + - intb-only + + timeout-sec: + maxItems: 2 + + regulators: + $ref: /schemas/regulator/rohm,bd96801-regulator.yaml + description: + List of child nodes that specify the regulators. + +required: + - compatible + - reg + - interrupts + - interrupt-names + - regulators + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/leds/common.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + pmic: pmic@60 { + reg = <0x60>; + compatible = "rohm,bd96801"; + interrupt-parent = <&gpio1>; + interrupts = <29 IRQ_TYPE_LEVEL_LOW>, <6 IRQ_TYPE_LEVEL_LOW>; + interrupt-names = "intb", "errb"; + + regulators { + buck1 { + regulator-name = "buck1"; + regulator-ramp-delay = <1250>; + /* 0.5V min INITIAL - 150 mV tune */ + regulator-min-microvolt = <350000>; + /* 3.3V + 150mV tune */ + regulator-max-microvolt = <3450000>; + + /* These can be set only when PMIC is in STBY */ + rohm,initial-voltage-microvolt = <500000>; + regulator-ov-error-microvolt = <230000>; + regulator-uv-error-microvolt = <230000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-warn-kelvin = <0>; + }; + buck2 { + regulator-name = "buck2"; + regulator-min-microvolt = <350000>; + regulator-max-microvolt = <3450000>; + + rohm,initial-voltage-microvolt = <3000000>; + regulator-ov-error-microvolt = <18000>; + regulator-uv-error-microvolt = <18000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-warn-kelvin = <1>; + }; + buck3 { + regulator-name = "buck3"; + regulator-min-microvolt = <350000>; + regulator-max-microvolt = <3450000>; + + rohm,initial-voltage-microvolt = <600000>; + regulator-ov-warn-microvolt = <18000>; + regulator-uv-warn-microvolt = <18000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-error-kelvin = <0>; + }; + buck4 { + regulator-name = "buck4"; + regulator-min-microvolt = <350000>; + regulator-max-microvolt = <3450000>; + + rohm,initial-voltage-microvolt = <600000>; + regulator-ov-warn-microvolt = <18000>; + regulator-uv-warn-microvolt = <18000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-error-kelvin = <0>; + }; + ldo5 { + regulator-name = "ldo5"; + regulator-min-microvolt = <300000>; + regulator-max-microvolt = <3300000>; + + rohm,initial-voltage-microvolt = <500000>; + regulator-ov-error-microvolt = <36000>; + regulator-uv-error-microvolt = <34000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-warn-kelvin = <0>; + }; + ldo6 { + regulator-name = "ldo6"; + regulator-min-microvolt = <300000>; + regulator-max-microvolt = <3300000>; + + rohm,initial-voltage-microvolt = <300000>; + regulator-ov-error-microvolt = <36000>; + regulator-uv-error-microvolt = <34000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-warn-kelvin = <0>; + }; + ldo7 { + regulator-name = "ldo7"; + regulator-min-microvolt = <300000>; + regulator-max-microvolt = <3300000>; + + rohm,initial-voltage-microvolt = <500000>; + regulator-ov-error-microvolt = <36000>; + regulator-uv-error-microvolt = <34000>; + regulator-temp-protection-kelvin = <1>; + regulator-temp-warn-kelvin = <0>; + }; + }; + }; + }; -- 2.45.1 -- Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~ Thanks to Simon Glass for the translation =]
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