linux-kernel - Re: [PATCH] hwmon: (adt7475) document mapping of sysfs entries to inputs

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Message-ID: <092d62bc-8919-bb18-c377-57e3b7018c17@roeck-us.net>
Date:   Tue, 30 Oct 2018 20:41:23 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     jdelvare@...e.com, corbet@....net, linux-hwmon@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwmon: (adt7475) document mapping of sysfs entries to
 inputs

On 10/30/18 1:25 PM, Chris Packham wrote:
> As per the usual standard with hwmon drivers the mapping to sysfs
> entries follows the register map of the device e.g. in0_input
> corresponds to the register 0x20, in1_input corresponds to 0x21 etc.
> 
> Hardware designers tend to work with input pins instead of registers
> which is where things start to get confusing. A hardware designer might
> say "the 1.5V rail is connected to the VCCP pin" leaving the software
> designer none the wiser as to which of the sysfs entries should be
> associated with the label "1.5V".
> 
> Try to bridge the gap by documenting the mapping of sysfs entries to
> the corresponding pins. This should allow someone to create a
> configuration file or other mapping without needing to dive into the
> code and ADT datasheets.
> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>

Applied to hwmon-next.

Thanks,
Guenter