linux-kernel - Re: [PATCH 26/28] dt-bindings: spi: Convert spi-pxa2xx to json-schema

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Date:   Sun, 17 May 2020 21:30:38 +0200
From:   Lubomir Rintel <lkundrak@...sk>
To:     Rob Herring <robh@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Brown <broonie@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-media@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 26/28] dt-bindings: spi: Convert spi-pxa2xx to json-schema

On Fri, Mar 27, 2020 at 01:52:39PM -0600, Rob Herring wrote:
> On Tue, Mar 17, 2020 at 10:39:20AM +0100, Lubomir Rintel wrote:
> > A straightforward conversion of the the spi-pxa2xx binding to DT schema
> > format using json-schema.
> > 
> > Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> > ---
> >  .../bindings/spi/marvell,mmp2-ssp.yaml        | 58 +++++++++++++++++++
> >  .../devicetree/bindings/spi/spi-pxa2xx.txt    | 27 ---------
> >  2 files changed, 58 insertions(+), 27 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml
> >  delete mode 100644 Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml b/Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml
> > new file mode 100644
> > index 0000000000000..de6b6a53b70d8
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml
> > @@ -0,0 +1,58 @@
> > +# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
> 
> Same issue on license...

I've written the original document and have chosen this license (for no
good reason, but I don't think that matters).

> > +# Copyright 2019,2020 Lubomir Rintel <lkundrak@...sk>
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/spi/marvell,mmp2-ssp.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: PXA2xx SSP SPI Controller bindings
> > +
> > +maintainers:
> > +  - Lubomir Rintel <lkundrak@...sk>
> > +
> > +allOf:
> > +  - $ref: spi-controller.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    const: marvell,mmp2-ssp
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  ready-gpios:
> > +    description: |
> > +      GPIO used to signal a SPI master that the FIFO is filled and we're
> > +      ready to service a transfer. Only useful in slave mode.
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - clocks
> 
> > +  - '#address-cells'
> > +  - '#size-cells'
> 
> spi-controller.yaml handles these being required and also that they 
> aren't for slave mode.
> 
> > +
> > +dependencies:
> > +  ready-gpios: [ spi-slave ]
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/marvell,mmp2.h>
> > +    spi@...35000 {
> > +        compatible = "marvell,mmp2-ssp";
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +        reg = <0xd4035000 0x1000>;
> > +        clocks = <&soc_clocks MMP2_CLK_SSP0>;
> > +        interrupts = <0>;
> > +    };
> > +
> > +...
> > diff --git a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> > deleted file mode 100644
> > index e30e0c2a4bce1..0000000000000
> > --- a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> > +++ /dev/null
> > @@ -1,27 +0,0 @@
> > -PXA2xx SSP SPI Controller
> > -
> > -Required properties:
> > -- compatible: Must be "marvell,mmp2-ssp".
> > -- reg: Offset and length of the device's register set.
> > -- interrupts: Should be the interrupt number.
> > -- clocks: Should contain a single entry describing the clock input.
> > -- #address-cells:  Number of cells required to define a chip select address.
> > -- #size-cells: Should be zero.
> > -
> > -Optional properties:
> > -- cs-gpios: list of GPIO chip selects. See the SPI bus bindings,
> > -  Documentation/devicetree/bindings/spi/spi-bus.txt
> > -- spi-slave: Empty property indicating the SPI controller is used in slave mode.
> > -- ready-gpios: GPIO used to signal a SPI master that the FIFO is filled
> > -  and we're ready to service a transfer. Only useful in slave mode.
> > -
> > -Child nodes represent devices on the SPI bus
> > -  See ../spi/spi-bus.txt
> > -
> > -Example:
> > -	ssp1: spi@...35000 {
> > -		compatible = "marvell,mmp2-ssp";
> > -		reg = <0xd4035000 0x1000>;
> > -		clocks = <&soc_clocks MMP2_CLK_SSP0>;
> > -		interrupts = <0>;
> > -	};
> > -- 
> > 2.25.1
> >