RE: [PATCH RFC 3/6] dt-bindings: rtc: isl1208: Convert to json-schema

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Hi All,

> Subject: RE: [PATCH RFC 3/6] dt-bindings: rtc: isl1208: Convert to json-
> schema
> 
> 
> 
> 
> > -----Original Message-----
> > From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > Sent: Wednesday, May 3, 2023 9:46 AM
> > To: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>; Alexandre Belloni
> > <alexandre.belloni@xxxxxxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>;
> > Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
> > Cc: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>; Trent Piepho
> > <tpiepho@xxxxxxxxxx>; linux-rtc@xxxxxxxxxxxxxxx;
> > devicetree@xxxxxxxxxxxxxxx; Geert Uytterhoeven
> > <geert+renesas@xxxxxxxxx>; Fabrizio Castro
> > <fabrizio.castro.jz@xxxxxxxxxxx>; linux-renesas-soc@xxxxxxxxxxxxxxx
> > Subject: [PATCH RFC 3/6] dt-bindings: rtc: isl1208: Convert to
> > json-schema
> >
> > Convert the isl1208 RTC device tree binding documentation to json-schema.
> >
> > Update the example to match reality.
> >
> > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > ---
> >  .../devicetree/bindings/rtc/isil,isl1208.txt  | 38 ----------
> > .../devicetree/bindings/rtc/isil,isl1208.yaml | 74 +++++++++++++++++++
> >  2 files changed, 74 insertions(+), 38 deletions(-)  delete mode
> > 100644 Documentation/devicetree/bindings/rtc/isil,isl1208.txt
> >  create mode 100644
> > Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/rtc/isil,isl1208.txt
> > b/Documentation/devicetree/bindings/rtc/isil,isl1208.txt
> > deleted file mode 100644
> > index 51f003006f04..000000000000
> > --- a/Documentation/devicetree/bindings/rtc/isil,isl1208.txt
> > +++ /dev/null
> > @@ -1,38 +0,0 @@
> > -Intersil ISL1209/19 I2C RTC/Alarm chip with event in
> > -
> > -ISL12X9 have additional pins EVIN and #EVDET for tamper detection,
> > while the
> > -ISL1208 and ISL1218 do not.  They are all use the same driver with
> > the bindings -described here, with chip specific properties as noted.
> > -
> > -Required properties supported by the device:
> > - - "compatible": Should be one of the following:
> > -		- "isil,isl1208"
> > -		- "isil,isl1209"
> > -		- "isil,isl1218"
> > -		- "isil,isl1219"
> > - - "reg": I2C bus address of the device
> > -
> > -Optional properties:
> > - - "interrupt-names": list which may contains "irq" and "evdet"
> > -	evdet applies to isl1209 and isl1219 only
> > - - "interrupts": list of interrupts for "irq" and "evdet"
> > -	evdet applies to isl1209 and isl1219 only
> > - - "isil,ev-evienb": Enable or disable internal pull on EVIN pin
> > -	Applies to isl1209 and isl1219 only
> > -	Possible values are 0 and 1
> > -	Value 0 enables internal pull-up on evin pin, 1 disables it.
> > -	Default will leave the non-volatile configuration of the pullup
> > -	as is.
> > -
> > -Example isl1219 node with #IRQ pin connected to SoC gpio1 pin12 and
> > #EVDET pin -connected to SoC gpio2 pin 24 and internal pull-up enabled in
> EVIN pin.
> > -
> > -	isl1219: rtc@68 {
> > -		compatible = "isil,isl1219";
> > -		reg = <0x68>;
> > -		interrupt-names = "irq", "evdet";
> > -		interrupts-extended = <&gpio1 12 IRQ_TYPE_EDGE_FALLING>,
> > -			<&gpio2 24 IRQ_TYPE_EDGE_FALLING>;
> > -		isil,ev-evienb = <1>;
> > -	};
> > -
> > diff --git a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> > b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> > new file mode 100644
> > index 000000000000..04d51887855f
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
> > @@ -0,0 +1,74 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id:
> > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +ce
> > +tree.org%2Fschemas%2Frtc%2Fisil%2Cisl1208.yaml%23&data=05%7C01%7Cbiju
> > +.d
> > +as.jz%40bp.renesas.com%7C369929b1ce554af8b10008db4bb2e184%7C53d82571d
> > +a1
> > +947e49cb4625a166a4a2a%7C0%7C0%7C638187003880337413%7CUnknown%7CTWFpbG
> > +Zs
> > +b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3
> > +D%
> > +7C3000%7C%7C%7C&sdata=hhWJWxRzJEgudMmnw%2Fl9DgpL0%2BaPRWfWDK2mGqztl3c
> > +%3
> > +D&reserved=0
> > +$schema:
> > +https://jpn01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +ce
> > +tree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7Cbiju.das.jz%40bp.
> > +renesas.com%7C369929b1ce554af8b10008db4bb2e184%7C53d82571da1947e49cb4
> > +62
> > +5a166a4a2a%7C0%7C0%7C638187003880337413%7CUnknown%7CTWFpbGZsb3d8eyJWI
> > +jo
> > +iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C
> > +%7
> > +C%7C&sdata=figbanniGklELxfV4t10SVsg4i0X%2Bozm68rxXy4pupg%3D&reserved=
> > +0
> > +
> > +title: Intersil ISL12{08,09,18,19} I2C RTC/Alarm chip
> > +
> > +maintainers:
> > +  - Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > +  - Trent Piepho <tpiepho@xxxxxxxxxx>
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - enum:
> > +          - isil,isl1208
> > +          - isil,isl1209
> > +          - isil,isl1218
> > +          - isil,isl1219
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    minItems: 1
> > +    maxItems: 2
> > +
> > +  interrupt-names:
> > +    items:
> > +      - const: irq
> > +      - const: evdet
> > +
> > +  isil,ev-evienb:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    enum: [ 0, 1 ]
> > +    default: 0
> 
> Not sure, default should be removed as per [1]?
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
> next.git/tree/Documentation/devicetree/bindings/rtc/isil,isl1208.txt?h=next-
> 20230428#n20

Or

as per HW data sheet[1], the reset value is 0, so we should keep the default value.

[2] https://www.renesas.com/us/en/document/dst/isl1219-datasheet


Cheers,
Biju

> 
> > +    description: |
> > +      Enable or disable internal pull on EVIN pin:
> > +        <0> : Enable internal pull-up
> > +        <1> : Disable internal pull-up
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +allOf:
> > +  - $ref: rtc.yaml#
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            enum:
> > +              - isil,isl1209
> > +              - isil,isl1219
> > +    then:
> > +      required:
> > +        - interrupts-extended
> > +        - interrupt-names
> > +        - isil,ev-evienb
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    i2c {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        rtc_twi: rtc@6f {
> > +            compatible = "isil,isl1208";
> > +            reg = <0x6f>;
> > +        };
> > +    };
> > --
> > 2.25.1





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