linux-kernel - Re: [PATCH 6/6] Documentation/devicetree: Add FSI-attached I2C master dt bindings

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Message-ID: <ec4a5fec-fea0-09a7-8559-99d8eb071093@ozlabs.org>
Date:   Tue, 27 Jun 2017 09:06:04 +0800
From:   Jeremy Kerr <jk@...abs.org>
To:     Eddie James <eajames@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        wsa@...-dreams.de, robh+dt@...nel.org, gregkh@...uxfoundation.org,
        joel@....id.au, andrew@...id.au,
        "Edward A. James" <eajames@...ibm.com>
Subject: Re: [PATCH 6/6] Documentation/devicetree: Add FSI-attached I2C master
 dt bindings

Hi Eddie,

> +Required properties:
> + - compatible = "ibm,i2cm-fsi";
> + - reg = < address size >;		: The FSI CFAM address and address space
> +					  size.
> + - #address-cells = <1>;		: Number of address cells in child nodes
> + - #size-cells = <0>;			: Number of size cells in child nodes.
> + - child nodes				: Nodes to describe ports off the I2C
> +					  master.
> +
> +Child node required properties:
> + - reg = < port number >		: The port number on the I2C master.
> +
> +Examples:
> +
> +    i2cm@...0 {
> +        compatible = "ibm,i2cm-fsi";
> +        reg = < 0x1800 0x400 >;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        port@0 {
> +            reg = <0>;
> +        };
> +
> +        port@1 {
> +            reg = <1>;
> +        };
> +    };

Those child nodes represent the downstream i2c buses, and so also
contain the i2c slave devices, right? If so, you may want to document
that, and/or add a simple device to that example (say, an EEPROM).

Cheers,


Jeremy