linux-kernel - Re: [PATCH 02/26] docs: i2c: summary: extend introduction

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Date:   Mon, 20 Jan 2020 10:27:30 +0100
From:   Jean Delvare <jdelvare@...e.de>
To:     Luca Ceresoli <luca@...aceresoli.net>
Cc:     linux-doc@...r.kernel.org, linux-i2c@...r.kernel.org,
        Wolfram Sang <wsa@...-dreams.de>,
        Peter Rosin <peda@...ntia.se>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/26] docs: i2c: summary: extend introduction

On Sun,  5 Jan 2020 23:49:48 +0100, Luca Ceresoli wrote:
> - state the "official" name (I²C, not I2C, according to the spec) at
>    the beginning but keep using the more practical I2C elsewhere
>  - mention some known different names
>  - add link to the specification document

Indentation is inconsistent.

> 
> Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>
> ---
>  Documentation/i2c/summary.rst | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/i2c/summary.rst b/Documentation/i2c/summary.rst
> index 3a24eac17375..b7d3e620155b 100644
> --- a/Documentation/i2c/summary.rst
> +++ b/Documentation/i2c/summary.rst
> @@ -2,12 +2,18 @@
>  I2C and SMBus
>  =============
>  
> -I2C (pronounce: I squared C) is a protocol developed by Philips. It is a
> -slow two-wire protocol (variable speed, up to 400 kHz), with a high speed
> -extension (3.4 MHz).  It provides an inexpensive bus for connecting many
> -types of devices with infrequent or low bandwidth communications needs.
> -I2C is widely used with embedded systems.  Some systems use variants that
> -don't meet branding requirements, and so are not advertised as being I2C.
> +I²C (pronounce: I squared C and written I2C in the kernel documentation) is
> +a protocol developed by Philips. It is a slow two-wire protocol (variable
> +speed, up to 400 kHz), with a high speed extension (3.4 MHz).  It provides
> +an inexpensive bus for connecting many types of devices with infrequent or
> +low bandwidth communications needs.  I2C is widely used with embedded
> +systems.  Some systems use variants that don't meet branding requirements,
> +and so are not advertised as being I2C but with different names, e.g. TWI
> +(Two Wire Interface), IIC.

Maybe that's just me but "but with different names" sounds strange to
me in the sentence construct. Maybe "but come under different names"
instead?

> +
> +The official I2C specification is the `"I2C-bus specification and user
> +manual" (UM10204) <https://www.nxp.com/docs/en/user-guide/UM10204.pdf>`_
> +published by NXP Semiconductors.
>  
>  SMBus (System Management Bus) is based on the I2C protocol, and is mostly
>  a subset of I2C protocols and signaling.  Many I2C devices will work on an

Reviewed-by: Jean Delvare <jdelvare@...e.de>

-- 
Jean Delvare
SUSE L3 Support