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Message-ID: <a1b2caed-b314-59db-ee00-92fc983150f6@linaro.org>
Date: Tue, 30 May 2023 14:24:22 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Chris Packham <chris.packham@...iedtelesis.co.nz>,
miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
conor+dt@...nel.org, andrew@...n.ch, gregory.clement@...tlin.com,
sebastian.hesselbarth@...il.com, vadym.kochan@...ision.eu
Cc: linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
enachman@...vell.com
Subject: Re: [PATCH v6 1/2] dt-bindings: mtd: marvell-nand: Convert to YAML DT
scheme
On 30/05/2023 02:53, Chris Packham wrote:
> From: Vadym Kochan <vadym.kochan@...ision.eu>
>
> Switch the DT binding to a YAML schema to enable the DT validation.
>
> Dropped deprecated compatibles and properties described in txt file.
>
> Signed-off-by: Vadym Kochan <vadym.kochan@...ision.eu>
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> ---
>
> Notes:
> Changes in v6:
> - remove properties covered by nand-controller.yaml
> - add example using armada-8k compatible
>
> earlier changes:
>
> v5:
> 1) Get back "label" and "partitions" properties but without
Where are they? Did you drop them in v6?
> ref to the "partition.yaml" which was wrongly used.
>
> 2) Add "additionalProperties: false" for nand@ because all possible
> properties are described.
Where? This cannot be silently dropped!
>
> v4:
> 1) Remove "label" and "partitions" properties
>
> 2) Use 2 clocks for A7K/8K platform which is a requirement
>
> v3:
> 1) Remove txt version from the MAINTAINERS list
>
> 2) Use enum for some of compatible strings
>
> 3) Drop:
> #address-cells
> #size-cells:
>
> as they are inherited from the nand-controller.yaml
>
> 4) Add restriction to use 2 clocks for A8K SoC
>
> 5) Dropped description for clock-names and extend it with
> minItems: 1
>
> 6) Drop description for "dmas"
>
> 7) Use "unevalautedProperties: false"
>
> 8) Drop quites from yaml refs.
>
> 9) Use 4-space indentation for the example section
>
> v2:
> 1) Fixed warning by yamllint with incorrect indentation for compatible list
>
> .../bindings/mtd/marvell,nand-controller.yaml | 190 ++++++++++++++++++
> .../devicetree/bindings/mtd/marvell-nand.txt | 126 ------------
> MAINTAINERS | 1 -
> 3 files changed, 190 insertions(+), 127 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
> delete mode 100644 Documentation/devicetree/bindings/mtd/marvell-nand.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
> new file mode 100644
> index 000000000000..c4b003f5fa9f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/marvell,nand-controller.yaml
> @@ -0,0 +1,190 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/marvell,nand-controller.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell NAND Flash Controller (NFC)
> +
> +maintainers:
> + - Miquel Raynal <miquel.raynal@...tlin.com>
Is it correct person for Marvell NAND? This should be not a subsystem
maintainer, but a device maintainer.
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - const: marvell,armada-8k-nand-controller
> + - const: marvell,armada370-nand-controller
> + - enum:
> + - marvell,armada370-nand-controller
> + - marvell,pxa3xx-nand-controller
You miss here deprecated compatibles, which are BTW still used. Don't
drop properties and compatibles during conversion.
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + description:
> + Shall reference the NAND controller clocks, the second one is
> + is only needed for the Armada 7K/8K SoCs
> + minItems: 1
> + maxItems: 2
> +
> + clock-names:
Missing minItems: 1
> + items:
> + - const: core
> + - const: reg
> +
> + dmas:
> + maxItems: 1
> +
> + dma-names:
> + items:
> + - const: rxtx
> +
> + marvell,system-controller:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description: Syscon node that handles NAND controller related registers
> +
> +patternProperties:
> + "^nand@[0-3]$":
> + type: object
Missing unevaluatedProperties: false on this level.
> + properties:
> + reg:
> + minimum: 0
> + maximum: 3
> +
> + nand-rb:
> + minimum: 0
> + maximum: 1
It's an array, so this does not sound right. You might want to put it
under items:. Then you also miss min/maxItems.
> +
> + nand-ecc-step-size:
> + const: 512
> +
> + nand-ecc-strength:
> + enum: [1, 4, 8]
> +
> + marvell,nand-keep-config:
> + description: |
> + Orders the driver not to take the timings from the core and
> + leaving them completely untouched. Bootloader timings will then
> + be used.
> + $ref: /schemas/types.yaml#/definitions/flag
> +
> + marvell,nand-enable-arbiter:
> + description: |
> + To enable the arbiter, all boards blindly used it,
> + this bit was set by the bootloader for many boards and even if
> + it is marked reserved in several datasheets, it might be needed to set
> + it (otherwise it is harmless) so whether or not this property is set,
> + the bit is selected by the driver.
> + $ref: /schemas/types.yaml#/definitions/flag
> + deprecated: true
> +
> + required:
> + - reg
> + - nand-rb
> +
> +allOf:
> + - $ref: nand-controller.yaml
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: marvell,pxa3xx-nand-controller
> + then:
> + required:
> + - dmas
> + - dma-names
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: marvell,armada-8k-nand-controller
> + then:
> + properties:
> + clocks:
> + minItems: 2
> + maxItems: 2
Drop maxItems. You don't have it in clock-names.
> +
> + clock-names:
> + minItems: 2
> +
> + required:
> + - marvell,system-controller
> + else:
> + properties:
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + maxItems: 1
I doubt that you tested it in above variant...
> +
> +unevaluatedProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + nand_controller: nand-controller@...00 {
> + compatible = "marvell,armada370-nand-controller";
> + reg = <0xd0000 0x54>;
> + #address-cells = <1>;
> + #size-cells = <0>;
Best regards,
Krzysztof
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