Date: Sun, 7 Apr 2013 17:17:25 -0700
From: Guenter Roeck <linux@roeck-us.net>
To: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>,
        Rob Herring <rob.herring@calxeda.com>, Rob Landley <rob@landley.net>,
        Mike Turquette <mturquette@linaro.org>,
        Stephen Warren <swarren@nvidia.com>,
        Thierry Reding <thierry.reding@avionic-design.de>,
        Dom Cobley <popcornmix@gmail.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Pawel Moll <pawel.moll@arm.com>,
        Mark Brown <broonie@opensource.wolfsonmicro.com>,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
        Rabeeh Khoury <rabeeh@solid-run.com>, Daniel Mack <zonque@gmail.com>,
        Jean-Francois Moine <moinejf@free.fr>,
        Lars-Peter Clausen <lars@metafoo.de>,
        devicetree-discuss@lists.ozlabs.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [v5] clk: add si5351 i2c common clock driver
Message-ID: <20130408001725.GA16648@roeck-us.net>
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 <20130407225046.GA16326@roeck-us.net>
 <51620604.4070204@gmail.com>
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On Mon, Apr 08, 2013 at 01:49:24AM +0200, Sebastian Hesselbarth wrote:
> On 04/08/2013 12:50 AM, Guenter Roeck wrote:
> >On Fri, Apr 05, 2013 at 05:23:35AM -0000, Sebastian Hesselbarth wrote:
> >>This patch adds a common clock driver for Silicon Labs Si5351a/b/c
> >>i2c programmable clock generators. Currently, the driver supports
> >>DT kernels only and VXCO feature of si5351b is not implemented. DT
> >>bindings selectively allow to overwrite stored Si5351 configuration
> >>which is very helpful for clock generators with empty eeprom
> >>configuration. Corresponding device tree binding documentation is
> >>also added.
> >>
> >>Signed-off-by: Sebastian Hesselbarth<sebastian.hesselbarth@gmail.com>
> >>Tested-by: Daniel Mack<zonque@gmail.com>
> >>
> >[ ... ]
> >
> >>+static inline void _si5351_msynth_set_pll_master(
> >>+	struct si5351_driver_data *drvdata, unsigned char num, int is_master)
> >>+{
> >>+	unsigned long flags;
> >>+
> >>+	if (num>  8 ||
> >>+	    (drvdata->variant == SI5351_VARIANT_A3&&  num>  3))
> >>+		return;
> >>+
> >>+	flags = __clk_get_flags(drvdata->msynth[num].hw.clk);
> >>+	if (is_master)
> >>+		flags |= CLK_SET_RATE_PARENT;
> >>+	else
> >>+		flags&= ~CLK_SET_RATE_PARENT;
> >>+	__clk_set_flags(drvdata->msynth[num].hw.clk, flags);
> >>+}
> >>+
> >Unless I am missing something, neither __clk_get_flags() nor the new
> >__clk_set_flags is exported.
> >
> >Did you try to build and load the driver as module ?
> 
> Well, good catch. I didn't try to build v5 as a module, but I guess it
> will fail. But I consider this as something that has to be addressed in
> clk framework itself, not in this patch. There will be other
> clk-providers built as module in the future for sure.
> 
Sure, but you provided the patch to make __clk_set_flags global. To avoid
build failures, I would suggest to either submit a patch to export the
missing functions, or to remove the ability to build the driver as module.

On a side note, do you happen to know anyone working on drivers for Si5319 or
Si5368 ?

Thanks,
Guenter
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