RE: [PATCH 1/3] dt-bindings: pinctrl: support i.MX95 SCMI pinctrl

[Peng Fan <peng.fan@xxxxxxx>]

Hi Rob,

> Subject: Re: [PATCH 1/3] dt-bindings: pinctrl: support i.MX95 SCMI pinctrl
> 
> On Fri, Apr 12, 2024 at 08:29:25AM +0800, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@xxxxxxx>
> >
> > i.MX95 Pinctrl is managed by SCMI firmware using OEM extensions. This
> > patch is to add i.MX95 Pinctrl OEM extensions properties.
> >
> > Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> > ---
> >  .../bindings/pinctrl/nxp,imx95-pinctrl.yaml        | 44
> ++++++++++++++++++++++
> >  1 file changed, 44 insertions(+)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/pinctrl/nxp,imx95-pinctrl.yaml
> > b/Documentation/devicetree/bindings/pinctrl/nxp,imx95-pinctrl.yaml
> > new file mode 100644
> > index 000000000000..4bf7a6192813
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/nxp,imx95-pinctrl.yaml
> > @@ -0,0 +1,44 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) # Copyright 2024
> > +NXP %YAML 1.2
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fschemas%2Fpinctrl%2Fnxp%2Cimx95-
> pinctrl.yaml%23&data=05%
> >
> +7C02%7Cpeng.fan%40nxp.com%7C4c448715c4ad4cd1f70808dc5d9e6924%
> 7C686ea1
> >
> +d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638488182142511691%7CU
> nknown%7CT
> >
> +WFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL
> CJXVC
> >
> +I6Mn0%3D%7C0%7C%7C%7C&sdata=BckWIcVgYU6l8lV6fIpyDIZHt5hCyFdgF
> xaWBUBb9
> > +7s%3D&reserved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fmeta-
> schemas%2Fcore.yaml%23&data=05%7C02%7Cpeng.fan%40nx
> >
> +p.com%7C4c448715c4ad4cd1f70808dc5d9e6924%7C686ea1d3bc2b4c6fa9
> 2cd99c5c
> >
> +301635%7C0%7C0%7C638488182142522802%7CUnknown%7CTWFpbGZs
> b3d8eyJWIjoiM
> >
> +C4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7
> C%7C%7
> >
> +C&sdata=1BJASfju905Rua9G2mkNvPKDppN9%2BP5UaxFCbXDtPqo%3D&res
> erved=0
> > +
> > +title: i.MX System Control and Management Interface (SCMI) Pinctrl
> > +Protocol
> > +
> > +maintainers:
> > +  - Peng Fan <peng.fan@xxxxxxx>
> > +
> > +patternProperties:
> > +  '-pins$': false
> 
> Why?

The node will be as blow, there is no
"-pins$".

+&scmi_iomuxc {                                                                                     
+       pinctrl_uart1: uart1grp {                                                                   
+               txd {                                                                               
+                       pins = "uart1txd";                                                          
+                       nxp,func-id = <0>;                                                          
+                       nxp,pin-conf = <0x31e>;                                                     
+               };                                                                                  
+               rxd {                                                                               
+                       pins = "uart1rxd";                                                          
+                       nxp,func-id = <0>;                                                          
+                       nxp,pin-conf = <0x31e>;                                                     
+               };                                                                                  
+       };
> 
> > +  'grp$':
> > +    type: object
> 
> Missing 'additionalProperties: false'

Fix in v2.

> 
> > +
> > +    properties:
> > +      $nodename:
> > +        pattern: "^[0-9a-f]+$"
> 
> Drop. That has no effect. You just defined the nodename above.

This is to define a subnode, as just listed above, "txd" and "rxd".

> 
> > +
> > +      pins:
> > +        $ref: /schemas/types.yaml#/definitions/string
> > +        description: name of the pin
> 
> Needs to define the possible values.

There will be hundreds of pins, I need to list them all here?

> 
> > +
> > +      nxp,func-id:
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        description: high impedance mode ("third-state", "floating")
> 
> We already have a standard property for high impendance. You should know
> that since you obviously copied the description...

My bad. Fix in v2.

> 
> > +
> > +      nxp,pin-conf:
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        description: latch weakly
> 
> Same here.

Fix in v2.

> 
> > +
> > +      nxp,daisy-id:
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        description: pull up the pin. Takes as optional argument on hardware
> > +          supporting it the pull strength in Ohm.
> 
> And here...

Fix in v2.

> 
> > +
> > +      nxp,daisy-conf:
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        description: pull down the pin. Takes as optional argument on
> hardware
> > +          supporting it the pull strength in Ohm.
> 
> And here...

Fix in v2.

Thanks,
Peng.
> 
> > +
> > +additionalProperties: true
> >
> > --
> > 2.37.1
> >