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Date: Tue, 5 Nov 2019 09:14:41 +0100
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>
Cc: "kent@...oris.se" <kent@...oris.se>,
"davem@...emloft.net" <davem@...emloft.net>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"paulmck@...ux.ibm.com" <paulmck@...ux.ibm.com>,
"lars@...afoo.de" <lars@...afoo.de>,
"jic23@...nel.org" <jic23@...nel.org>,
"knaack.h@....de" <knaack.h@....de>,
"pmeerw@...erw.net" <pmeerw@...erw.net>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: iio: dac: Migrate LTC1660 documentation to
yaml
Hi Alexandru,
See comments below.
On Tue, Nov 05, 2019 at 06:42:06AM +0000, Ardelean, Alexandru wrote:
> On Mon, 2019-11-04 at 18:40 +0100, Marcus Folkesson wrote:
> > [External]
> >
> > Rewrite bindings to use json-schema vocabulary.
>
> Hey,
>
> Overall looks good.
>
> A few comments inline.
> Rob may add more.
Thank you for looking into this!
>
> >
> > Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
> > ---
> > .../bindings/iio/dac/lltc,ltc1660.yaml | 54 +++++++++++++++++++
> > .../devicetree/bindings/iio/dac/ltc1660.txt | 21 --------
> > MAINTAINERS | 2 +-
> > 3 files changed, 55 insertions(+), 22 deletions(-)
> > create mode 100644
> > Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
> > delete mode 100644 Documentation/devicetree/bindings/iio/dac/ltc1660.txt
> >
> > diff --git a/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
> > b/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
> > new file mode 100644
> > index 000000000000..1f3136bfffcd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
> > @@ -0,0 +1,54 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +# Copyright 2019 Marcus Folkesson <marcus.folkesson@...il.com>
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/bindings/iio/dac/lltc,ltc1660.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: Linear Technology Micropower octal 8-Bit and 10-Bit DACs
> > +
> > +maintainers:
> > + - Marcus Folkesson <marcus.folkesson@...il.com>
> > +
> > +description: |
> > + Bindings for the Linear Technology Micropower octal 8-Bit and 10-Bit
> > DAC.
> > + Datasheet can be found here:
> > https://www.analog.com/media/en/technical-documentation/data-sheets/166560fa.pdf
> > +
> > +properties:
> > + compatible:
> > + enum:
> > + - lltc,ltc1660
> > + - lltc,ltc1665
> > +
> > + reg:
> > + description: SPI chip select number for the device
>
> You can remove description.
> It's a standard property.
>
Ok, I will remove it.
> > + maxItems: 1
> > +
> > + spi-max-frequency:
> > + description: |
> > + Definition as per Documentation/devicetree/bindings/spi/spi-
> > bus.txt.
> > + maximum: 5000000
> > + maxItems: 1
>
> I think you can probably remove `spi-max-frequency` from here.
> It's documented in the base SPI schema.
>
Yes it is, and I was not really sure if I should include that property, but
I wanted to somehow document the maximum frequency that the chip can handle as it could be useful information.
> > +
> > + vref-supply:
> > + description: Phandle to the external reference voltage supply.
> > + maxItems: 1
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - vref-supply
> > +
> > +examples:
> > + - |
> > + spi {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + dac@0 {
> > + compatible = "lltc,ltc1660";
> > + reg = <0>;
> > + spi-max-frequency = <5000000>;
> > + vref-supply = <&vref_reg>;
> > + };
> > + };
> > diff --git a/Documentation/devicetree/bindings/iio/dac/ltc1660.txt
> > b/Documentation/devicetree/bindings/iio/dac/ltc1660.txt
> > deleted file mode 100644
> > index c5b5f22d6c64..000000000000
> > --- a/Documentation/devicetree/bindings/iio/dac/ltc1660.txt
> > +++ /dev/null
> > @@ -1,21 +0,0 @@
> > -* Linear Technology Micropower octal 8-Bit and 10-Bit DACs
> > -
> > -Required properties:
> > - - compatible: Must be one of the following:
> > - "lltc,ltc1660"
> > - "lltc,ltc1665"
> > - - reg: SPI chip select number for the device
> > - - vref-supply: Phandle to the voltage reference supply
> > -
> > -Recommended properties:
> > - - spi-max-frequency: Definition as per
> > - Documentation/devicetree/bindings/spi/spi-bus.txt.
> > - Max frequency for this chip is 5 MHz.
> > -
> > -Example:
> > -dac@0 {
> > - compatible = "lltc,ltc1660";
> > - reg = <0>;
> > - spi-max-frequency = <5000000>;
> > - vref-supply = <&vref_reg>;
> > -};
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index fbccc9d450ff..23497d713298 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -9619,7 +9619,7 @@ LTC1660 DAC DRIVER
> > M: Marcus Folkesson <marcus.folkesson@...il.com>
> > L: linux-iio@...r.kernel.org
> > S: Maintained
> > -F: Documentation/devicetree/bindings/iio/dac/ltc1660.txt
> > +F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
> > F: drivers/iio/dac/ltc1660.c
> >
> > LTC4261 HARDWARE MONITOR DRIVER
I guess I wait for Robs review until I post a v2.
Thanks,
Marcus Folkesson
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