linux-kernel - Re: [PATCH v3 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

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Message-ID: <20241112-aged-trailing-cffda6af0944@spud>
Date: Tue, 12 Nov 2024 18:03:14 +0000
From: Conor Dooley <conor@...nel.org>
To: Troy Mitchell <troymitchell988@...il.com>
Cc: Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-riscv@...ts.infradead.org,
	linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: i2c: spacemit: add support for K1 SoC

On Tue, Nov 12, 2024 at 11:07:39AM +0800, Troy Mitchell wrote:
> From: Troy Mitchell <troymitchell988@...il.com>
> 
> The I2C of K1 supports fast-speed-mode and high-speed-mode,
> and supports FIFO transmission.
> 
> Signed-off-by: Troy Mitchell <TroyMitchell988@...il.com>
> ---
>  .../devicetree/bindings/i2c/spacemit,k1-i2c.yaml   | 52 ++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml
> new file mode 100644
> index 000000000000..e8cce360bf03
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/spacemit,k1-i2c.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/i2c/spacemit,k1-i2c.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: I2C controller embedded in SpacemiT's K1 SoC
> +
> +maintainers:
> +  - Troy Mitchell <troymitchell988@...il.com>
> +
> +properties:
> +  compatible:
> +    const: spacemit,k1-i2c
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    description:
> +      Desired I2C bus clock frequency in Hz.
> +      K1 supports standard, fast, high-speed modes, from 1 to 3300000.
> +    default: 100000
> +    minimum: 1
> +    maximum: 3300000

It's sufficient to define just default and max btw, the min is set in
i2c-controller.yaml (in dt-schema itself). Don't respin for that alone.

Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    i2c@...10800 {
> +        compatible = "spacemit,k1-i2c";
> +        reg = <0xd4010800 0x38>;
> +        interrupt-parent = <&plic>;
> +        interrupts = <36>;
> +        clocks = <&ccu 90>;
> +        clock-frequency = <100000>;
> +    };
> +
> +...
> 
> -- 
> 2.34.1
> 

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