linux-kernel - RE: [PATCH V3 2/3] dt-bindings: pinctrl: Convert i.MX8MM to json-schema

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Date:   Wed, 15 Jan 2020 08:17:28 +0000
From:   Anson Huang <anson.huang@....com>
To:     Marco Felsch <m.felsch@...gutronix.de>
CC:     Aisheng Dong <aisheng.dong@....com>,
        "festevam@...il.com" <festevam@...il.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V3 2/3] dt-bindings: pinctrl: Convert i.MX8MM to
 json-schema

Hi, Marco

> Subject: Re: [PATCH V3 2/3] dt-bindings: pinctrl: Convert i.MX8MM to json-
> schema
> 
> Hi Anson,
> 
> On 20-01-15 09:30, Anson Huang wrote:
> > Convert the i.MX8MM pinctrl binding to DT schema format using
> > json-schema
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > ---
> > Change since V2:
> > 	- the lisence should be GPL-2.0
> > ---
> >  .../bindings/pinctrl/fsl,imx8mm-pinctrl.txt        | 36 -----------
> >  .../bindings/pinctrl/fsl,imx8mm-pinctrl.yaml       | 69
> ++++++++++++++++++++++
> >  2 files changed, 69 insertions(+), 36 deletions(-)  delete mode
> > 100644
> > Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
> >  create mode 100644
> > Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
> > b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
> > deleted file mode 100644
> > index e4e01c0..0000000
> > --- a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.txt
> > +++ /dev/null
> > @@ -1,36 +0,0 @@
> > -* Freescale IMX8MM IOMUX Controller
> > -
> > -Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this
> > directory -for common binding part and usage.
> > -
> > -Required properties:
> > -- compatible: "fsl,imx8mm-iomuxc"
> > -- reg: should contain the base physical address and size of the
> > iomuxc
> > -  registers.
> > -
> > -Required properties in sub-nodes:
> > -- fsl,pins: each entry consists of 6 integers and represents the mux
> > and config
> > -  setting for one pin.  The first 5 integers <mux_reg conf_reg
> > input_reg mux_val
> > -  input_val> are specified using a PIN_FUNC_ID macro, which can be
> > found in
> > -  <arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h>. The last integer
> > CONFIG is
> > -  the pad setting value like pull-up on this pin.  Please refer to
> > i.MX8M Mini
> > -  Reference Manual for detailed CONFIG settings.
> > -
> > -Examples:
> > -
> > -&uart1 {
> > -       pinctrl-names = "default";
> > -       pinctrl-0 = <&pinctrl_uart1>;
> > -};
> > -
> > -iomuxc: pinctrl@...30000 {
> > -        compatible = "fsl,imx8mm-iomuxc";
> > -        reg = <0x0 0x30330000 0x0 0x10000>;
> > -
> > -        pinctrl_uart1: uart1grp {
> > -                fsl,pins = <
> > -                        MX8MM_IOMUXC_UART1_RXD_UART1_DCE_RX             0x140
> > -                        MX8MM_IOMUXC_UART1_TXD_UART1_DCE_TX             0x140
> > -                >;
> > -        };
> > -};
> > diff --git
> > a/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml
> > b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yaml
> > new file mode 100644
> > index 0000000..8b2de93
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/fsl,imx8mm-pinctrl.yam
> > +++ l
> > @@ -0,0 +1,69 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fschemas%2Fpinctrl%2Ffsl%2Cimx8mm-
> pinctrl.yaml%23&amp;dat
> >
> +a=02%7C01%7Canson.huang%40nxp.com%7C5940bd35fa2b432ccd9008d79
> 98b1366%
> >
> +7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63714669491458312
> 4&amp;s
> >
> +data=JqPAVaqc%2BvdH9UDy2EkYEVf9s1IrDzvgLBoyeJgYnnA%3D&amp;rese
> rved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> > +cetree.org%2Fmeta-
> schemas%2Fcore.yaml%23&amp;data=02%7C01%7Canson.hua
> >
> +ng%40nxp.com%7C5940bd35fa2b432ccd9008d7998b1366%7C686ea1d3bc2
> b4c6fa92
> >
> +cd99c5c301635%7C0%7C0%7C637146694914583124&amp;sdata=6oJNpbgK
> %2FhINLR
> > +j%2B6kV8RnwPkfcdugxU3aHLZXLzTto%3D&amp;reserved=0
> > +
> > +title: Freescale IMX8MM IOMUX Controller
> > +
> > +maintainers:
> > +  - Anson Huang <Anson.Huang@....com>
> > +
> > +description:
> > +  Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in
> > +this directory
> > +  for common binding part and usage.
> > +
> > +properties:
> > +  compatible:
> > +    const: fsl,imx8mm-iomuxc
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +# Client device subnode's properties
> > +patternProperties:
> > +  'grp$':
> > +    type: object
> > +    description:
> > +      Pinctrl node's client devices use subnodes for desired pin configuration.
> > +      Client device subnodes use below standard properties.
> > +
> > +    properties:
> > +      fsl,pins:
> > +        allOf:
> > +          - $ref: /schemas/types.yaml#/definitions/uint32-array
> > +        description:
> > +          each entry consists of 6 integers and represents the mux and config
> > +          setting for one pin. The first 5 integers <mux_reg conf_reg input_reg
> > +          mux_val input_val> are specified using a PIN_FUNC_ID macro, which
> can
> > +          be found in <arch/arm64/boot/dts/freescale/imx8mm-pinfunc.h>.
> The last
> > +          integer CONFIG is the pad setting value like pull-up on this pin.
> Please
> > +          refer to i.MX8M Mini Reference Manual for detailed CONFIG settings.
> > +
> > +    required:
> > +      - fsl,pins
> > +
> > +    additionalProperties: false
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  # Pinmux controller node
> > +  - |
> > +    iomuxc: pinctrl@...30000 {
> > +        compatible = "fsl,imx8mm-iomuxc";
> > +        reg = <0x30330000 0x10000>;
> > +
> > +        pinctrl_uart2: uart2grp {
> > +            fsl,pins = <
> > +                0x23C 0x4A4 0x4FC 0x0 0x0	0x140
> 
> Why we can't use the pinctrl defines like
> MX8MM_IOMUXC_UART1_RXD_UART1_DCE_RX anymore?

The reason why I put the value NOT macro define here is the header file is put
in arch/arm64/boot/dts/freescale/ folder rather than include/dt-binding/pinctrl/,
so when using macro define, need to include the header file using absolute path 
arch/arm64/boot/dts/freescale/, I think it is NOT that good, so I put the value here directly.

Anson.