linux-kernel - Re: [RFC PATCH v1 01/10] dt-bindings: mtd: add rockchip nand controller bindings

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Date:   Tue, 14 Jan 2020 19:57:06 -0600
From:   Rob Herring <robh@...nel.org>
To:     Johan Jonker <jbx6244@...il.com>
Cc:     miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        mark.rutland@....com, heiko@...ech.de,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v1 01/10] dt-bindings: mtd: add rockchip nand
 controller bindings

On Wed, Jan 08, 2020 at 09:53:29PM +0100, Johan Jonker wrote:
> Add the Rockchip NAND controller bindings.
> 
> Signed-off-by: Johan Jonker <jbx6244@...il.com>
> ---
>  .../devicetree/bindings/mtd/rockchip,nandc.yaml    | 78 ++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mtd/rockchip,nandc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mtd/rockchip,nandc.yaml b/Documentation/devicetree/bindings/mtd/rockchip,nandc.yaml
> new file mode 100644
> index 000000000..573d1a580
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/rockchip,nandc.yaml
> @@ -0,0 +1,78 @@
> +# SPDX-License-Identifier: GPL-2.0

Dual license new bindings:

(GPL-2.0-only OR BSD-2-Clause)

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/rockchip,nandc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip NAND Controller Device Tree Bindings
> +
> +allOf:
> +  - $ref: "nand-controller.yaml"

Should end with a '#'.

> +
> +maintainers:
> +  - Heiko Stuebner <heiko@...ech.de>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - rockchip,nandc-v6
> +      - rockchip,nandc-v9

Use SoC specific compatibles, not version numbers.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 2
> +
> +  clock-names:
> +    oneOf:
> +      - items:
> +        - const: hclk_nandc
> +      - items:
> +        - const: clk_nandc
> +        - const: hclk_nandc

Can't you put hclk_nandc first so it's always index 0.

> +
> +patternProperties:
> +  "^nand@[a-f0-9]+$":
> +    type: object
> +    properties:
> +      reg:
> +        minimum: 0
> +        maximum: 3
> +
> +      nand-is-boot-medium: true
> +
> +    additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/rk3188-cru-common.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    nandc: nand-controller@...00000 {
> +      compatible = "rockchip,nandc-v6";
> +      reg = <0x10500000 0x4000>;
> +      interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
> +      clocks = <&cru HCLK_NANDC0>;
> +      clock-names = "hclk_nandc";
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      nand@0 {
> +        reg = <0>;
> +        nand-is-boot-medium;
> +      };
> +    };
> +
> +...
> -- 
> 2.11.0
>