Re: [PATCH 4/4 v2] [RFC] UIO: generic platform driver

From: Uwe Kleine-König
Date: Fri Apr 11 2008 - 07:05:15 EST


Hello,

Hans J. Koch wrote:
> On Fri, Apr 11, 2008 at 11:21:58AM +0200, Uwe Kleine-König wrote:
> >
> > Below is a new version that uses linux/stringify and zeros size for
> > unused mappings (line 102ff).
>
> Thanks, but it doesn't compile, neither with -rc8 nor with Linus' git.
>
> One problem can easily be fixed, the macro is called __stringify, not
> stringify.
I just notice that, too. My mail address that and your's just crossed
each other.

> But what about this:
>
> ERROR: "clk_get" [drivers/uio/uio_pdrv.ko] undefined!
> ERROR: "clk_enable" [drivers/uio/uio_pdrv.ko] undefined!
> ERROR: "clk_disable" [drivers/uio/uio_pdrv.ko] undefined!
> ERROR: "clk_put" [drivers/uio/uio_pdrv.ko] undefined!
>
> Do you have any extra patches applied?
Yes I have, but nothing special. This is part of a generic API defined
in include/linux/clk.h. One of it's use it to abstract away some
platform dependencies. There are several architectures that define
it[1]. I used it to allow enabling the device only when the device is
opened. Typical things in the enable routine are enabling a clock or
reserve and configure gpios etc.

A minimal dummy implementation that should work here is:

#define clk_get(dev, id) NULL
#define clk_put(clk) ((void)0)
#define clk_enable(clk) (1)
#define clk_disable(clk) ((void)0)

Best regards
Uwe

[1] Try:

git ls-files -z | xargs -0 perl -n -e 'print "$ARGV\n" if /EXPORT_SYMBOL(?:_GPL)?\s*\(\s*clk_get\s*\)/;'

--
Uwe Kleine-König, Software Engineer
Digi International GmbH Branch Breisach, Küferstrasse 8, 79206 Breisach, Germany
Tax: 315/5781/0242 / VAT: DE153662976 / Reg. Amtsgericht Dortmund HRB 13962
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