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SubjectRe: [PATCH v1 1/3] dt-bindings: iio: adc: convert rockchip saradc bindings to yaml
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Hi Jonathan,

Am Sonntag, 15. März 2020, 12:22:23 CET schrieb Jonathan Cameron:
> On Fri, 13 Mar 2020 14:29:24 +0100
> Johan Jonker <jbx6244@gmail.com> wrote:
>
> > Current dts files with 'saradc' nodes are manually verified.
> > In order to automate this process rockchip-saradc.txt
> > has to be converted to yaml.
> >
> > Signed-off-by: Johan Jonker <jbx6244@gmail.com>
>
> Hi Johan,
>
> A question inline which may just be my lack of yaml knowledge
> showing itself!
>
> Jonathan
>
> > ---
> > .../bindings/iio/adc/rockchip-saradc.txt | 37 ----------
> > .../bindings/iio/adc/rockchip-saradc.yaml | 79 ++++++++++++++++++++++
> > 2 files changed, 79 insertions(+), 37 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
> > create mode 100644 Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
> > deleted file mode 100644
> > index c2c50b598..000000000
> > --- a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
> > +++ /dev/null
> > @@ -1,37 +0,0 @@
> > -Rockchip Successive Approximation Register (SAR) A/D Converter bindings
> > -
> > -Required properties:
> > -- compatible: should be "rockchip,<name>-saradc" or "rockchip,rk3066-tsadc"
> > - - "rockchip,saradc": for rk3188, rk3288
> > - - "rockchip,rk3066-tsadc": for rk3036
> > - - "rockchip,rk3328-saradc", "rockchip,rk3399-saradc": for rk3328
> > - - "rockchip,rk3399-saradc": for rk3399
> > - - "rockchip,rv1108-saradc", "rockchip,rk3399-saradc": for rv1108
> > -
> > -- reg: physical base address of the controller and length of memory mapped
> > - region.
> > -- interrupts: The interrupt number to the cpu. The interrupt specifier format
> > - depends on the interrupt controller.
> > -- clocks: Must contain an entry for each entry in clock-names.
> > -- clock-names: Shall be "saradc" for the converter-clock, and "apb_pclk" for
> > - the peripheral clock.
> > -- vref-supply: The regulator supply ADC reference voltage.
> > -- #io-channel-cells: Should be 1, see ../iio-bindings.txt
> > -
> > -Optional properties:
> > -- resets: Must contain an entry for each entry in reset-names if need support
> > - this option. See ../reset/reset.txt for details.
> > -- reset-names: Must include the name "saradc-apb".
> > -
> > -Example:
> > - saradc: saradc@2006c000 {
> > - compatible = "rockchip,saradc";
> > - reg = <0x2006c000 0x100>;
> > - interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> > - clocks = <&cru SCLK_SARADC>, <&cru PCLK_SARADC>;
> > - clock-names = "saradc", "apb_pclk";
> > - resets = <&cru SRST_SARADC>;
> > - reset-names = "saradc-apb";
> > - #io-channel-cells = <1>;
> > - vref-supply = <&vcc18>;
> > - };
> > diff --git a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
> > new file mode 100644
> > index 000000000..2908788b3
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
> > @@ -0,0 +1,79 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/adc/rockchip-saradc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Rockchip Successive Approximation Register (SAR) A/D Converter
> > +
> > +maintainers:
> > + - Heiko Stuebner <heiko@sntech.de>
> > +
> > +properties:
> > + compatible:
> > + oneOf:
> > + - const: rockchip,saradc
> > + - const: rockchip,rk3066-tsadc
> > + - const: rockchip,rk3399-saradc
> > + - items:
> > + - enum:
> > + - rockchip,rk3328-saradc
> > + - rockchip,rv1108-saradc
> > + - const: rockchip,rk3399-saradc
>
> My yaml knowledge isn't great. Why do we have this nested
> structure rather than a straight forward list?

That should be the
- one of rk3328-saradc / rv1108-saradc
- plus always rk3399-saradc

i.e. both rk3328 and rv1108 are compatible with the rk3399-saradc variant
(at least if no flaws get found at some point) so have the double compatible

compatible = "rockchip,rk3328-saradc", "rockchip,rk3399-saradc"
compatible = "rockchip,rv1108-saradc", "rockchip,rk3399-saradc"


Heiko


> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 1
> > +
> > + clocks:
> > + items:
> > + - description: converter clock
> > + - description: peripheral clock
> > +
> > + clock-names:
> > + items:
> > + - const: saradc
> > + - const: apb_pclk
> > +
> > + resets:
> > + maxItems: 1
> > +
> > + reset-names:
> > + const: saradc-apb
> > +
> > + vref-supply:
> > + description:
> > + The regulator supply for the ADC reference voltage.
> > +
> > + "#io-channel-cells":
> > + const: 1
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - clocks
> > + - clock-names
> > + - vref-supply
> > + - "#io-channel-cells"
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/rk3288-cru.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > + saradc: saradc@2006c000 {
> > + compatible = "rockchip,saradc";
> > + reg = <0x2006c000 0x100>;
> > + interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&cru SCLK_SARADC>, <&cru PCLK_SARADC>;
> > + clock-names = "saradc", "apb_pclk";
> > + resets = <&cru SRST_SARADC>;
> > + reset-names = "saradc-apb";
> > + vref-supply = <&vcc18>;
> > + #io-channel-cells = <1>;
> > + };
>
>




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