linux-kernel - Re: [PATCH v5 1/3] dt-bindings: i2c: extend existing opencore bindings.

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Date:   Mon, 20 May 2019 09:36:48 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Sagar Shrikant Kadam <sagar.kadam@...ive.com>
Cc:     Mark Rutland <mark.rutland@....com>, peter@...sgaard.com,
        Andrew Lunn <andrew@...n.ch>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Linux I2C <linux-i2c@...r.kernel.org>,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 1/3] dt-bindings: i2c: extend existing opencore bindings.

On Mon, May 20, 2019 at 9:12 AM Sagar Shrikant Kadam
<sagar.kadam@...ive.com> wrote:
>
> Add FU540-C000 specific device tree bindings to already
> available i2-ocores file. This device is available on
> HiFive Unleashed Rev A00 board. Move interrupt and interrupt
> parents under optional property list as these can be optional.
>
> The FU540-C000 SoC from sifive, has an Opencore's I2C block
> reimplementation.
>
> The DT compatibility string for this IP is present in HDL and available at.
> https://github.com/sifive/sifive-blocks/blob/master/src/main/scala/devices/i2c/I2C.scala#L73
>
> Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@...ive.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-ocores.txt | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
> index 17bef9a..b73960e 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-ocores.txt
> @@ -2,8 +2,11 @@ Device tree configuration for i2c-ocores
>
>  Required properties:
>  - compatible      : "opencores,i2c-ocores" or "aeroflexgaisler,i2cmst"
> +                    "sifive,fu540-c000-i2c" or "sifive,i2c0".

It's not an OR because both are required. Please reformat to 1 valid
combination per line.

> +                   for Opencore based I2C IP block reimplemented in
> +                   FU540-C000 SoC.Please refer sifive-blocks-ip-versioning.txt
> +                   for additional details.
>  - reg             : bus address start and address range size of device
> -- interrupts      : interrupt number
>  - clocks          : handle to the controller clock; see the note below.
>                      Mutually exclusive with opencores,ip-clock-frequency
>  - opencores,ip-clock-frequency: frequency of the controller clock in Hz;
> @@ -12,6 +15,8 @@ Required properties:
>  - #size-cells     : should be <0>
>
>  Optional properties:
> +- interrupt-parent: handle to interrupt controller.

Drop this. interrupt-parent is implied.

> +- interrupts      : interrupt number.
>  - clock-frequency : frequency of bus clock in Hz; see the note below.
>                      Defaults to 100 KHz when the property is not specified
>  - reg-shift       : device register offsets are shifted by this value
> --
> 1.9.1
>