linux-kernel - Re: [PATCH v1 1/4] dt-bindings: pinctrl: mvebu: Document bindings for AC5

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Message-ID: <bdbe78d5-8e86-940f-0cb8-19ffe0f74ef7@alliedtelesis.co.nz>
Date:   Thu, 10 Mar 2022 23:53:34 +0000
From:   Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To:     Rob Herring <robh@...nel.org>
CC:     "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "gregory.clement@...tlin.com" <gregory.clement@...tlin.com>,
        "sebastian.hesselbarth@...il.com" <sebastian.hesselbarth@...il.com>,
        "kostap@...vell.com" <kostap@...vell.com>,
        "robert.marko@...tura.hr" <robert.marko@...tura.hr>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v1 1/4] dt-bindings: pinctrl: mvebu: Document bindings for
 AC5

Hi Rob,

On 11/03/22 12:25, Rob Herring wrote:
> On Thu, Mar 10, 2022 at 04:00:36PM +1300, Chris Packham wrote:
>> Add JSON schema for marvell,ac5-pinctrl present on the Marvell 98DX2530
>> SoC.
>>
>> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
>> ---
>>   .../bindings/pinctrl/marvell,ac5-pinctrl.yaml | 73 +++++++++++++++++++
>>   1 file changed, 73 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
>> new file mode 100644
>> index 000000000000..c7ab3d0e8420
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
>> @@ -0,0 +1,73 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://scanmail.trustwave.com/?c=20988&d=5Iiq4o6Dmr7xiwkJNrr25TNxYxK78lIUEWeJ-yq0UA&u=http%3a%2f%2fdevicetree%2eorg%2fschemas%2fpinctrl%2fmarvell%2cac5-pinctrl%2eyaml%23
>> +$schema: http://scanmail.trustwave.com/?c=20988&d=5Iiq4o6Dmr7xiwkJNrr25TNxYxK78lIUEWPe_X2yXg&u=http%3a%2f%2fdevicetree%2eorg%2fmeta-schemas%2fcore%2eyaml%23
>> +
>> +title: Marvell AC5 pin controller
>> +
>> +maintainers:
>> +  - Chris Packham <chris.packham@...iedtelesis.co.nz>
>> +
>> +description:
>> +  Bindings for Marvell's AC5 memory-mapped pin controller.
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - const: marvell,ac5-pinctrl
>> +      - const: syscon
>> +      - const: simple-mfd
> How is this a 'syscon' or 'simple-mfd' For syscon, what other
> functions/registers does it have? For simple-mfd, what other functions?
> You haven't defined them in the schema.

It's in the vendor dts I have and it's likely there because 
marvell,armada-37xx-pinctrl.txt has the same syscon and simple-mfd 
compatibles. Looking at how this is used I think it's more like the 
older mvebu pinctrl devices. I'll remove these two compatibles and 
update the dtsi file.

>
> blank line needed here.
>
>> +  reg:
>> +    maxItems: 1
>> +
>> +patternProperties:
>> +  '-pins$':
>> +    type: object
>> +    $ref: pinmux-node.yaml#
>> +
>> +    properties:
>> +      marvell,function:
>> +        $ref: "/schemas/types.yaml#/definitions/string"
>> +        description:
>> +          Indicates the function to select.
>> +        enum: [ gpio, i2c0, i2c1, nand, sdio, spi0, spi1, uart0, uart1, uart2, uart3 ]
>> +
>> +      marvell,pins:
>> +        $ref: /schemas/types.yaml#/definitions/string-array
>> +        description:
>> +          Array of MPP pins to be used for the given function.
>> +        minItems: 1
>> +        items:
>> +          enum: [ mpp0, mpp1, mpp2, mpp3, mpp4, mpp5, mpp6, mpp7, mpp8, mpp9,
>> +                  mpp10, mpp11, mpp12, mpp13, mpp14, mpp15, mpp16, mpp17, mpp18, mpp19,
>> +                  mpp20, mpp21, mpp22, mpp23, mpp24, mpp25, mpp26, mpp27, mpp28, mpp29,
>> +                  mpp30, mpp31, mpp32, mpp33, mpp34, mpp35, mpp36, mpp37, mpp38, mpp39,
>> +                  mpp40, mpp41, mpp42, mpp43, mpp44, mpp45 ]
>> +
>> +allOf:
>> +  - $ref: "pinctrl.yaml#"
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    pinctrl@...20100 {
>> +      compatible = "marvell,ac5-pinctrl",
>> +      "syscon", "simple-mfd";
>> +      reg = <0x80020100 0x20>;
>> +
>> +      i2c0_pins: i2c0-pins {
>> +        marvell,pins = "mpp26", "mpp27";
>> +        marvell,function = "i2c0";
>> +      };
>> +
>> +      i2c0_gpio: i2c0-gpio-pins {
>> +        marvell,pins = "mpp26", "mpp27";
>> +        marvell,function = "gpio";
>> +      };
>> +    };
>> -- 
>> 2.35.1
>>
>>