linux-kernel - Re: [PATCH v3] clk: add si5351 i2c common clock driver

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Date:	Wed, 20 Mar 2013 09:20:16 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Mike Turquette <mturquette@...aro.org>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Stephen Warren <swarren@...dia.com>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	Dom Cobley <popcornmix@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Rabeeh Khoury <rabeeh@...id-run.com>,
	Daniel Mack <zonque@...il.com>,
	Jean-Francois Moine <moinejf@...e.fr>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] clk: add si5351 i2c common clock driver

On 03/20/2013 01:26 AM, Mike Turquette wrote:
> Quoting Sebastian Hesselbarth (2013-03-18 03:43:17)
>> 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@...il.com>
>> ---
>> Changes from v2:
>> - add curly brackets to if-else-statements (Reported by Daniel Mack)
>> - fix div-by-zero for clk6/clk7 (Reported by Daniel Mack)
>> - fix parameter address calculation for clk6/clk7
>>
>> Changes from v1:
>> - remove .is_enabled functions as they read from i2c
>>    (Reported by Daniel Mack)
>> - add CLK_SET_RATE_PARENT on clkout reparent if clkout uses
>>    its own multisync
>>
>
> I've just pushed out a new clk-next branch which includes Ulf Hansson's
> series to introduce the .is_prepared callback.  Perhaps you can use that
> where you were previously using .is_enabled?

Mike,

thanks for the info, but I think having .prepare_enable and regmap caching
is just fine for now. When .is_prepared is in mainline, I will re-add the
callbacks.

Sebastian
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