linux-kernel - Re: [PATCH v7 01/10] counter: Introduce the Generic Counter interface

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Message-Id: <20180717204954.4b5e371603d0b40b2aaabbb8@linux-foundation.org>
Date:   Tue, 17 Jul 2018 20:49:54 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     William Breathitt Gray <vilhelm.gray@...il.com>
Cc:     gregkh@...uxfoundation.org, jic23@...nel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        fabrice.gasnier@...com, benjamin.gaignard@...com,
        robh+dt@...nel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, mark.rutland@....com
Subject: Re: [PATCH v7 01/10] counter: Introduce the Generic Counter
 interface

On Thu, 21 Jun 2018 17:07:08 -0400 William Breathitt Gray <vilhelm.gray@...il.com> wrote:

> This patch introduces the Generic Counter interface for supporting
> counter devices.
> 

+EXPORT_SYMBOL(count_direction_str);
+EXPORT_SYMBOL(count_mode_str);
+EXPORT_SYMBOL(counter_signal_enum_read);
+EXPORT_SYMBOL(counter_signal_enum_write);
+EXPORT_SYMBOL(counter_signal_enum_available_read);
+EXPORT_SYMBOL(counter_count_enum_read);
+EXPORT_SYMBOL(counter_count_enum_write);
+EXPORT_SYMBOL(counter_count_enum_available_read);
+EXPORT_SYMBOL(counter_device_enum_read);
+EXPORT_SYMBOL(counter_device_enum_write);
+EXPORT_SYMBOL(counter_device_enum_available_read);
+EXPORT_SYMBOL(signal_read_value_set);
+EXPORT_SYMBOL(count_read_value_set);
+EXPORT_SYMBOL(count_write_value_get);
+EXPORT_SYMBOL(counter_register);
+EXPORT_SYMBOL(counter_unregister);
+EXPORT_SYMBOL(devm_counter_register);
+EXPORT_SYMBOL(devm_counter_unregister);

The naming is a bit chaotic.  Most of the symbols start with counter_,
which is good.  But a handful do not.

Also, symbols called signal_* make my head spin - Linux already has a
firmly ingrained notion of what a signal is, and this ain't it ;)
Although the kernel tends to use sig_ for signals-as-an-IPC-thing.

Also, many many drivers deal with signals-as-an-electrical-thing - is
it appropriate for this particular driver to take that namespace?