From: Wolfram Sang <wsa@the-dreams.de>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-i2c@vger.kernel.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: Re: [PATCH v1 1/2] i2c: designware: Make master module optional
Date: Wed, 15 Apr 2020 13:37:20 +0200 [thread overview]
Message-ID: <20200415113720.GA910@ninjato> (raw)
In-Reply-To: <20200325114529.GU1922688@smile.fi.intel.com>
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> > Size of i2c-designware-core.ko is around 12 kB with all master, slave and
> > Baytrail semaphore code built in so I don't think it justifies the added
> > config complexity. I think distributions will have anyway all of those
> > options set.
>
> I would rather go with conditional based on I²C generic options, like I2C_SLAVE.
> Do we have something similar for master?
No, we don't have that.
>
> > Having those code in separate modules and load only when needed might make
> > sense as that would save a few kB of RAM.
>
> ...which makes sense for embedded systems where exactly the device represents
> I²C slave.
Frankly: an I2C-slave-only embedded system which runs a modern Linux and
cannot afford those few KB on a core feature it needs? If so, maybe it
should have an out-of-tree patch to achieve this. I don't think it is
worth the added complexity for the upstream version.
Sidenote: There is a lot more overhead in the i2c-core. I think the
complexity to move out stuff there is even more messy.
Disclaimer: you may prove me wrong, of course :)
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prev parent reply other threads:[~2020-04-15 11:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 10:04 [PATCH v1 1/2] i2c: designware: Make master module optional Andy Shevchenko
2020-03-23 10:04 ` [PATCH v1 2/2] i2c: designware: Move configuration routines to respective modules Andy Shevchenko
2020-03-23 12:26 ` [PATCH v1 1/2] i2c: designware: Make master module optional Andy Shevchenko
2020-03-25 7:47 ` Jarkko Nikula
2020-03-25 11:45 ` Andy Shevchenko
2020-04-15 11:37 ` Wolfram Sang [this message]
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