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Subject: Re: [PATCH V5 3/3] hwmon: pwm-fan: Add RPM support via external
 interrupt
To:     "Enrico Weigelt, metux IT consult" <lkml@metux.net>,
        Kamil Debski <kamil@wypas.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Jean Delvare <jdelvare@suse.com>,
        Guenter Roeck <linux@roeck-us.net>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Robin Murphy <robin.murphy@arm.com>
Cc:     linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1554989411-23666-1-git-send-email-stefan.wahren@i2se.com>
 <1554989411-23666-4-git-send-email-stefan.wahren@i2se.com>
 <24771fbe-0c45-78b0-e96b-6ed31ccdcb7f@metux.net>
From:   Stefan Wahren <stefan.wahren@i2se.com>
Message-ID: <518757ac-b0d7-298c-c896-4bd7e3b2ac5b@i2se.com>
Date:   Fri, 12 Apr 2019 15:35:13 +0200
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Hi Enrico,

On 12.04.19 15:15, Enrico Weigelt, metux IT consult wrote:
> On 11.04.19 15:30, Stefan Wahren wrote:
>> This adds RPM support to the pwm-fan driver in order to use with
>> fancontrol/pwmconfig. This feature is intended for fans with a tachometer
>> output signal, which generate a defined number of pulses per revolution.
> Wouldn't it be better to have a CONFIG_* flag for keeping the kernel
> image size smaller when this feature isn't needed ?

i compared the kernel module size in linux-next for ARM without and with
this patch:
without patch: 12088 bytes
with patch: 14292 bytes

I don't think it is worth the trouble.

Stefan

>
>
> --mtx
>