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[1/2] dt-bindings: regulator: Add bindings for Richtek RT5190A PMIC

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State Changes Requested, archived
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Series Add Richtek RT5190A PMIC support | expand

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Commit Message

ChiYuan Huang March 7, 2022, 10:08 a.m. UTC
From: ChiYuan Huang <cy_huang@richtek.com>

Add bindings for Richtek RT5190A PMIC.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
 .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml

Comments

Krzysztof Kozlowski March 7, 2022, 11:14 a.m. UTC | #1
On 07/03/2022 11:08, cy_huang wrote:
> From: ChiYuan Huang <cy_huang@richtek.com>
> 
> Add bindings for Richtek RT5190A PMIC.
> 
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> ---
>  .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
>  1 file changed, 138 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> new file mode 100644
> index 00000000..b9f5836
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> @@ -0,0 +1,138 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Richtek RT5190A PMIC Regulator
> +
> +maintainers:
> +  - ChiYuan Huang <cy_huang@richtek.com>
> +
> +description: |
> +  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
> +  synchronous buck converters, 1 LDO, I2C control interface and peripherial
> +  logical control.
> +
> +  It also supports mute AC OFF depop sound and quick setting storage while
> +  input power is removed.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - richtek,rt5190a
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  vin2-supply:
> +    description: phandle to buck2 input voltage.
> +
> +  vin3-supply:
> +    description: phandle to buck3 input voltage.
> +
> +  vin4-supply:
> +    description: phandle to buck4 input voltage.
> +
> +  vinldo-supply:
> +    description: phandle to ldo input voltage
> +
> +  richtek,buck1-fixed-microvolt:
> +    description: buck1 fixed voltage that depends on the external resistor.
> +    $ref: "/schemas/types.yaml#/definitions/uint32"

You should use standard bindings for it.

> +
> +  richtek,buck4-fixed-microvolt:
> +    description: buck4 fixed voltage that depends on the external resistor.
> +    $ref: "/schemas/types.yaml#/definitions/uint32"
> +
> +  richtek,ldo-fixed-microvolt:
> +    description: ldo fixed voltage that depends on the external resistor.
> +    $ref: "/schemas/types.yaml#/definitions/uint32"
> +
> +  richtek,mute-enable:
> +    description: this can be used to enable mute function.

Please describe what is "mute" function". Your description copied
property name, so it is not useful.

> +    type: boolean
> +
> +  regulators:
> +    type: object
> +
> +    patternProperties:
> +      "^buck[1-4]$|^ldo$":
> +        type: object
> +        $ref: regulator.yaml#
> +        description: |
> +          regulator description for buck[1-4] and ldo.
> +
> +        properties:
> +          richtek,latchup-enable:
> +            type: boolean
> +            description: |
> +              If specified, undervolt protection mode changes from the default
> +              hiccup to latchup.
> +
> +        unevaluatedProperties: false
> +
> +    additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - richtek,buck1-fixed-microvolt
> +  - richtek,buck4-fixed-microvolt
> +  - richtek,ldo-fixed-microvolt
> +  - regulators
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      rt5190a@64 {

Generic node name, so "pmic".

> +        compatible = "richtek,rt5190a";
> +        reg = <0x64>;
> +        interrupts-extended = <&gpio26 0 IRQ_TYPE_LEVEL_LOW>;
> +        vin2-supply = <&rt5190_buck1>;
> +        vin3-supply = <&rt5190_buck1>;
> +        vin4-supply = <&rt5190_buck1>;
> +        richtek,buck1-fixed-microvolt = <5090000>;
> +        richtek,buck4-fixed-microvolt = <850000>;
> +        richtek,ldo-fixed-microvolt = <1200000>;
> +
> +        regulators {
> +          rt5190_buck1: buck1 {
> +            regulator-name = "rt5190a-buck1";
> +            regulator-allowed-modes = <0 1>;

Please describe these in header file in bindings and mention as one of
regulator properties with description and enum.



Best regards,
Krzysztof
ChiYuan Huang March 7, 2022, 1:21 p.m. UTC | #2
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午7:14寫道:
>
> On 07/03/2022 11:08, cy_huang wrote:
> > From: ChiYuan Huang <cy_huang@richtek.com>
> >
> > Add bindings for Richtek RT5190A PMIC.
> >
> > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> > ---
> >  .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
> >  1 file changed, 138 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> > new file mode 100644
> > index 00000000..b9f5836
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> > @@ -0,0 +1,138 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Richtek RT5190A PMIC Regulator
> > +
> > +maintainers:
> > +  - ChiYuan Huang <cy_huang@richtek.com>
> > +
> > +description: |
> > +  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
> > +  synchronous buck converters, 1 LDO, I2C control interface and peripherial
> > +  logical control.
> > +
> > +  It also supports mute AC OFF depop sound and quick setting storage while
> > +  input power is removed.
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - richtek,rt5190a
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  vin2-supply:
> > +    description: phandle to buck2 input voltage.
> > +
> > +  vin3-supply:
> > +    description: phandle to buck3 input voltage.
> > +
> > +  vin4-supply:
> > +    description: phandle to buck4 input voltage.
> > +
> > +  vinldo-supply:
> > +    description: phandle to ldo input voltage
> > +
> > +  richtek,buck1-fixed-microvolt:
> > +    description: buck1 fixed voltage that depends on the external resistor.
> > +    $ref: "/schemas/types.yaml#/definitions/uint32"
>
> You should use standard bindings for it.
>
Sorry, I didn't get the point for the meaning 'standard binding'.
Do you mean to change 'richtek,buck1-fixed-microvolt' or 'uint32' definition?
This voltage depends on the external resistor selection. It's 'fixed'
by the application.
> > +
> > +  richtek,buck4-fixed-microvolt:
> > +    description: buck4 fixed voltage that depends on the external resistor.
> > +    $ref: "/schemas/types.yaml#/definitions/uint32"
> > +
> > +  richtek,ldo-fixed-microvolt:
> > +    description: ldo fixed voltage that depends on the external resistor.
> > +    $ref: "/schemas/types.yaml#/definitions/uint32"
> > +
> > +  richtek,mute-enable:
> > +    description: this can be used to enable mute function.
>
> Please describe what is "mute" function". Your description copied
> property name, so it is not useful.
>
OK, I'll describe more detailed.
> > +    type: boolean
> > +
> > +  regulators:
> > +    type: object
> > +
> > +    patternProperties:
> > +      "^buck[1-4]$|^ldo$":
> > +        type: object
> > +        $ref: regulator.yaml#
> > +        description: |
> > +          regulator description for buck[1-4] and ldo.
> > +
> > +        properties:
> > +          richtek,latchup-enable:
> > +            type: boolean
> > +            description: |
> > +              If specified, undervolt protection mode changes from the default
> > +              hiccup to latchup.
> > +
> > +        unevaluatedProperties: false
> > +
> > +    additionalProperties: false
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - richtek,buck1-fixed-microvolt
> > +  - richtek,buck4-fixed-microvolt
> > +  - richtek,ldo-fixed-microvolt
> > +  - regulators
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +
> > +    i2c {
> > +      #address-cells = <1>;
> > +      #size-cells = <0>;
> > +
> > +      rt5190a@64 {
>
> Generic node name, so "pmic".
>
Ack in next.
> > +        compatible = "richtek,rt5190a";
> > +        reg = <0x64>;
> > +        interrupts-extended = <&gpio26 0 IRQ_TYPE_LEVEL_LOW>;
> > +        vin2-supply = <&rt5190_buck1>;
> > +        vin3-supply = <&rt5190_buck1>;
> > +        vin4-supply = <&rt5190_buck1>;
> > +        richtek,buck1-fixed-microvolt = <5090000>;
> > +        richtek,buck4-fixed-microvolt = <850000>;
> > +        richtek,ldo-fixed-microvolt = <1200000>;
> > +
> > +        regulators {
> > +          rt5190_buck1: buck1 {
> > +            regulator-name = "rt5190a-buck1";
> > +            regulator-allowed-modes = <0 1>;
>
> Please describe these in header file in bindings and mention as one of
> regulator properties with description and enum.
>
OK, will add one dt-binding header file for the constant and mentioned
as one regulator property.
Ack in next.
>
>
> Best regards,
> Krzysztof
Krzysztof Kozlowski March 7, 2022, 1:27 p.m. UTC | #3
On 07/03/2022 14:21, ChiYuan Huang wrote:
> Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午7:14寫道:
>>
>> On 07/03/2022 11:08, cy_huang wrote:
>>> From: ChiYuan Huang <cy_huang@richtek.com>
>>>
>>> Add bindings for Richtek RT5190A PMIC.
>>>
>>> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
>>> ---
>>>  .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
>>>  1 file changed, 138 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>> new file mode 100644
>>> index 00000000..b9f5836
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>> @@ -0,0 +1,138 @@
>>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Richtek RT5190A PMIC Regulator
>>> +
>>> +maintainers:
>>> +  - ChiYuan Huang <cy_huang@richtek.com>
>>> +
>>> +description: |
>>> +  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
>>> +  synchronous buck converters, 1 LDO, I2C control interface and peripherial
>>> +  logical control.
>>> +
>>> +  It also supports mute AC OFF depop sound and quick setting storage while
>>> +  input power is removed.
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - richtek,rt5190a
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  interrupts:
>>> +    maxItems: 1
>>> +
>>> +  vin2-supply:
>>> +    description: phandle to buck2 input voltage.
>>> +
>>> +  vin3-supply:
>>> +    description: phandle to buck3 input voltage.
>>> +
>>> +  vin4-supply:
>>> +    description: phandle to buck4 input voltage.
>>> +
>>> +  vinldo-supply:
>>> +    description: phandle to ldo input voltage
>>> +
>>> +  richtek,buck1-fixed-microvolt:
>>> +    description: buck1 fixed voltage that depends on the external resistor.
>>> +    $ref: "/schemas/types.yaml#/definitions/uint32"
>>
>> You should use standard bindings for it.
>>
> Sorry, I didn't get the point for the meaning 'standard binding'.
> Do you mean to change 'richtek,buck1-fixed-microvolt' or 'uint32' definition?
> This voltage depends on the external resistor selection. It's 'fixed'
> by the application.

I meant that you should not have dedicated binding to set regulator
voltage, but use regulator-min/max-microvolt instead, within one
regulator node. Just set min/max to same level and handle it in the
driver. See for example:
drivers/regulator/scmi-regulator.c


Best regards,
Krzysztof
ChiYuan Huang March 7, 2022, 2:21 p.m. UTC | #4
HI, Krzysztof:

Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午9:27寫道:
>
> On 07/03/2022 14:21, ChiYuan Huang wrote:
> > Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午7:14寫道:
> >>
> >> On 07/03/2022 11:08, cy_huang wrote:
> >>> From: ChiYuan Huang <cy_huang@richtek.com>
> >>>
> >>> Add bindings for Richtek RT5190A PMIC.
> >>>
> >>> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> >>> ---
> >>>  .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
> >>>  1 file changed, 138 insertions(+)
> >>>  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> >>> new file mode 100644
> >>> index 00000000..b9f5836
> >>> --- /dev/null
> >>> +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
> >>> @@ -0,0 +1,138 @@
> >>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> >>> +%YAML 1.2
> >>> +---
> >>> +$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
> >>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >>> +
> >>> +title: Richtek RT5190A PMIC Regulator
> >>> +
> >>> +maintainers:
> >>> +  - ChiYuan Huang <cy_huang@richtek.com>
> >>> +
> >>> +description: |
> >>> +  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
> >>> +  synchronous buck converters, 1 LDO, I2C control interface and peripherial
> >>> +  logical control.
> >>> +
> >>> +  It also supports mute AC OFF depop sound and quick setting storage while
> >>> +  input power is removed.
> >>> +
> >>> +properties:
> >>> +  compatible:
> >>> +    enum:
> >>> +      - richtek,rt5190a
> >>> +
> >>> +  reg:
> >>> +    maxItems: 1
> >>> +
> >>> +  interrupts:
> >>> +    maxItems: 1
> >>> +
> >>> +  vin2-supply:
> >>> +    description: phandle to buck2 input voltage.
> >>> +
> >>> +  vin3-supply:
> >>> +    description: phandle to buck3 input voltage.
> >>> +
> >>> +  vin4-supply:
> >>> +    description: phandle to buck4 input voltage.
> >>> +
> >>> +  vinldo-supply:
> >>> +    description: phandle to ldo input voltage
> >>> +
> >>> +  richtek,buck1-fixed-microvolt:
> >>> +    description: buck1 fixed voltage that depends on the external resistor.
> >>> +    $ref: "/schemas/types.yaml#/definitions/uint32"
> >>
> >> You should use standard bindings for it.
> >>
> > Sorry, I didn't get the point for the meaning 'standard binding'.
> > Do you mean to change 'richtek,buck1-fixed-microvolt' or 'uint32' definition?
> > This voltage depends on the external resistor selection. It's 'fixed'
> > by the application.
>
> I meant that you should not have dedicated binding to set regulator
> voltage, but use regulator-min/max-microvolt instead, within one
> regulator node. Just set min/max to same level and handle it in the
> driver. See for example:
> drivers/regulator/scmi-regulator.c
>
As I know, regulator-min/max-microvolt is used as the usage constraint.

But out buck1/buck4/ldo vout is defined by
Vout = VFb * (1 + R1/R2) where R1/R2 is chosen by the circuit design.

It seems not similar with the scmi-regulator.

Do you really suggest to use regulator-min/max-microvolt????

>
> Best regards,
> Krzysztof
Krzysztof Kozlowski March 7, 2022, 2:26 p.m. UTC | #5
On 07/03/2022 15:21, ChiYuan Huang wrote:
> HI, Krzysztof:
> 
> Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午9:27寫道:
>>
>> On 07/03/2022 14:21, ChiYuan Huang wrote:
>>> Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年3月7日 週一 下午7:14寫道:
>>>>
>>>> On 07/03/2022 11:08, cy_huang wrote:
>>>>> From: ChiYuan Huang <cy_huang@richtek.com>
>>>>>
>>>>> Add bindings for Richtek RT5190A PMIC.
>>>>>
>>>>> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
>>>>> ---
>>>>>  .../regulator/richtek,rt5190a-regulator.yaml       | 138 +++++++++++++++++++++
>>>>>  1 file changed, 138 insertions(+)
>>>>>  create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>>>> new file mode 100644
>>>>> index 00000000..b9f5836
>>>>> --- /dev/null
>>>>> +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
>>>>> @@ -0,0 +1,138 @@
>>>>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>>>>> +%YAML 1.2
>>>>> +---
>>>>> +$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
>>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>>> +
>>>>> +title: Richtek RT5190A PMIC Regulator
>>>>> +
>>>>> +maintainers:
>>>>> +  - ChiYuan Huang <cy_huang@richtek.com>
>>>>> +
>>>>> +description: |
>>>>> +  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
>>>>> +  synchronous buck converters, 1 LDO, I2C control interface and peripherial
>>>>> +  logical control.
>>>>> +
>>>>> +  It also supports mute AC OFF depop sound and quick setting storage while
>>>>> +  input power is removed.
>>>>> +
>>>>> +properties:
>>>>> +  compatible:
>>>>> +    enum:
>>>>> +      - richtek,rt5190a
>>>>> +
>>>>> +  reg:
>>>>> +    maxItems: 1
>>>>> +
>>>>> +  interrupts:
>>>>> +    maxItems: 1
>>>>> +
>>>>> +  vin2-supply:
>>>>> +    description: phandle to buck2 input voltage.
>>>>> +
>>>>> +  vin3-supply:
>>>>> +    description: phandle to buck3 input voltage.
>>>>> +
>>>>> +  vin4-supply:
>>>>> +    description: phandle to buck4 input voltage.
>>>>> +
>>>>> +  vinldo-supply:
>>>>> +    description: phandle to ldo input voltage
>>>>> +
>>>>> +  richtek,buck1-fixed-microvolt:
>>>>> +    description: buck1 fixed voltage that depends on the external resistor.
>>>>> +    $ref: "/schemas/types.yaml#/definitions/uint32"
>>>>
>>>> You should use standard bindings for it.
>>>>
>>> Sorry, I didn't get the point for the meaning 'standard binding'.
>>> Do you mean to change 'richtek,buck1-fixed-microvolt' or 'uint32' definition?
>>> This voltage depends on the external resistor selection. It's 'fixed'
>>> by the application.
>>
>> I meant that you should not have dedicated binding to set regulator
>> voltage, but use regulator-min/max-microvolt instead, within one
>> regulator node. Just set min/max to same level and handle it in the
>> driver. See for example:
>> drivers/regulator/scmi-regulator.c
>>
> As I know, regulator-min/max-microvolt is used as the usage constraint.

True, bindings mention the consumers, but I don't think this is treated
literally.

> 
> But out buck1/buck4/ldo vout is defined by
> Vout = VFb * (1 + R1/R2) where R1/R2 is chosen by the circuit design.
> 
> It seems not similar with the scmi-regulator.
> 
> Do you really suggest to use regulator-min/max-microvolt????

The same as existing fixed-regulator. Why this regulator should be
different than fixed-regulator?

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
new file mode 100644
index 00000000..b9f5836
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/richtek,rt5190a-regulator.yaml
@@ -0,0 +1,138 @@ 
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/richtek,rt5190a-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT5190A PMIC Regulator
+
+maintainers:
+  - ChiYuan Huang <cy_huang@richtek.com>
+
+description: |
+  The RT5190A integrates 1 channel buck controller, 3 channels high efficiency
+  synchronous buck converters, 1 LDO, I2C control interface and peripherial
+  logical control.
+
+  It also supports mute AC OFF depop sound and quick setting storage while
+  input power is removed.
+
+properties:
+  compatible:
+    enum:
+      - richtek,rt5190a
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vin2-supply:
+    description: phandle to buck2 input voltage.
+
+  vin3-supply:
+    description: phandle to buck3 input voltage.
+
+  vin4-supply:
+    description: phandle to buck4 input voltage.
+
+  vinldo-supply:
+    description: phandle to ldo input voltage
+
+  richtek,buck1-fixed-microvolt:
+    description: buck1 fixed voltage that depends on the external resistor.
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+  richtek,buck4-fixed-microvolt:
+    description: buck4 fixed voltage that depends on the external resistor.
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+  richtek,ldo-fixed-microvolt:
+    description: ldo fixed voltage that depends on the external resistor.
+    $ref: "/schemas/types.yaml#/definitions/uint32"
+
+  richtek,mute-enable:
+    description: this can be used to enable mute function.
+    type: boolean
+
+  regulators:
+    type: object
+
+    patternProperties:
+      "^buck[1-4]$|^ldo$":
+        type: object
+        $ref: regulator.yaml#
+        description: |
+          regulator description for buck[1-4] and ldo.
+
+        properties:
+          richtek,latchup-enable:
+            type: boolean
+            description: |
+              If specified, undervolt protection mode changes from the default
+              hiccup to latchup.
+
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - richtek,buck1-fixed-microvolt
+  - richtek,buck4-fixed-microvolt
+  - richtek,ldo-fixed-microvolt
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      rt5190a@64 {
+        compatible = "richtek,rt5190a";
+        reg = <0x64>;
+        interrupts-extended = <&gpio26 0 IRQ_TYPE_LEVEL_LOW>;
+        vin2-supply = <&rt5190_buck1>;
+        vin3-supply = <&rt5190_buck1>;
+        vin4-supply = <&rt5190_buck1>;
+        richtek,buck1-fixed-microvolt = <5090000>;
+        richtek,buck4-fixed-microvolt = <850000>;
+        richtek,ldo-fixed-microvolt = <1200000>;
+
+        regulators {
+          rt5190_buck1: buck1 {
+            regulator-name = "rt5190a-buck1";
+            regulator-allowed-modes = <0 1>;
+            regulator-boot-on;
+          };
+          buck2 {
+            regulator-name = "rt5190a-buck2";
+            regulator-min-microvolt = <600000>;
+            regulator-max-microvolt = <1400000>;
+            regulator-boot-on;
+          };
+          buck3 {
+            regulator-name = "rt5190a-buck3";
+            regulator-min-microvolt = <600000>;
+            regulator-max-microvolt = <1400000>;
+            regulator-boot-on;
+          };
+          buck4 {
+            regulator-name = "rt5190a-buck4";
+            regulator-allowed-modes = <0 1>;
+            regulator-boot-on;
+          };
+          ldo {
+            regulator-name = "rt5190a-ldo";
+            regulator-boot-on;
+          };
+        };
+      };
+    };