linux-kernel - Re: [PATCH v4 1/2] dt-bindings: pinctrl: qcom: Add SM8350 pinctrl bindings

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Message-ID: <20210113025627.GA1414436@robh.at.kernel.org>
Date:   Tue, 12 Jan 2021 20:56:27 -0600
From:   Rob Herring <robh@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Vinod Koul <vkoul@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: pinctrl: qcom: Add SM8350 pinctrl
 bindings

On Thu, Jan 07, 2021 at 11:17:22AM -0600, Bjorn Andersson wrote:
> On Tue 05 Jan 23:49 CST 2021, Vinod Koul wrote:
> 
> > Add device tree binding Documentation details for Qualcomm SM8350
> > pinctrl driver.
> > 
> > Signed-off-by: Vinod Koul <vkoul@...nel.org>
> > ---
> >  .../bindings/pinctrl/qcom,sm8350-tlmm.yaml    | 149 ++++++++++++++++++
> >  1 file changed, 149 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/pinctrl/qcom,sm8350-tlmm.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,sm8350-tlmm.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,sm8350-tlmm.yaml
> > new file mode 100644
> > index 000000000000..abdafd25bfc2
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/qcom,sm8350-tlmm.yaml
> > @@ -0,0 +1,149 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pinctrl/qcom,sm8350-tlmm.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm Technologies, Inc. SM8350 TLMM block
> > +
> > +maintainers:
> > +  - Vinod Koul <vkoul@...nel.org>
> > +
> > +description: |
> > +  This binding describes the Top Level Mode Multiplexer block found in the
> > +  SM8350 platform.
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,sm8350-tlmm
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  interrupt-controller: true
> > +
> > +  '#interrupt-cells':
> > +    description: Specifies the PIN numbers and Flags, as defined in
> > +      include/dt-bindings/interrupt-controller/irq.h
> > +    const: 2
> > +
> > +  gpio-controller: true
> > +
> > +  '#gpio-cells':
> > +    description: Specifying the pin number and flags, as defined in
> > +      include/dt-bindings/gpio/gpio.h
> > +    const: 2
> > +
> > +  gpio-ranges:
> > +    maxItems: 1
> > +
> > +  gpio-reserved-ranges:
> > +    maxItems: 1
> > +
> > +#PIN CONFIGURATION NODES
> > +patternProperties:
> > +  '-pinmux$':
> 
> I believe that what Rob was asking for was the matter of describing the
> mux and config subnodes under this one. But I don't know really how to
> express this, because the following are all valid:
> 
> default_state: default-state {
> 	pins = "gpio1";
> 	bias-disable;
> };
> 
> default_state: default-state {
> 	rx {
> 		pins = "gpio1";
> 		function = "gpio";
> 		bias-disable;
> 	};
> };
> 
> default_state: default-state {
> 	pinmux {
> 		pins = "gpio1";
> 		function = "gpio";
> 	};
> 
> 	pinconf {
> 		pins = "gpio1";
> 		bias-disable;
> 	};
> };
> 
> I.e. the properties described here applies either to this node directly,
> or any subnodes (1 level) down.

Why!?

You can create a definition and reuse it. Something like this:

$defs:
  pin-node:
    type: object
    properties:
      ...

patternProperties:
  '-state$':
    oneOf:
      - $ref: #/$defs/pin-node

      - patternProperties:
          '.*':
            $ref: #/$defs/pin-node


Rob