linux-kernel - Re: [PATCH] clk: Constify struct clk_init

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Date:	Tue, 15 May 2012 09:42:04 -0700
From:	Saravana Kannan <skannan@...eaurora.org>
To:	Sascha Hauer <s.hauer@...gutronix.de>
CC:	"Turquette, Mike" <mturquette@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	andrew@...n.ch, rnayak@...com
Subject: Re: [PATCH] clk: Constify struct clk_init_data

On 05/15/2012 12:00 AM, Sascha Hauer wrote:
> On Mon, May 14, 2012 at 06:19:16PM -0700, Saravana Kannan wrote:
>> On 05/14/2012 02:53 PM, Turquette, Mike wrote:
>>> On Mon, May 14, 2012 at 7:12 AM, Mark Brown<broonie@...nsource.wolfsonmicro.com>   wrote:
>>>> Allow drivers to declare their clk_init_data const, the framework really
>>>> shouldn't be modifying the data.
>>>>
>>>> Signed-off-by: Mark Brown<broonie@...nsource.wolfsonmicro.com>
>>>
>>> +interested parties
>>>
>>>>
>>>> diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
>>>> index c1c23b9..fc43ea6 100644
>>>> --- a/include/linux/clk-provider.h
>>>> +++ b/include/linux/clk-provider.h
>>>> @@ -143,7 +143,7 @@ struct clk_init_data {
>>>>   */
>>>>   struct clk_hw {
>>>>         struct clk *clk;
>>>> -       struct clk_init_data *init;
>>>> +       const struct clk_init_data *init;
>>
>> Oh, wait. This won't work for the case where the clock registration
>> is completely dynamic. Say, created from device tree or thru some
>> PCI/USB device probe, etc. That's why I didn't add it before.
>
> Why not? In this case clk_init_data is also only used in clk_register.
> Given that Mark has posted the patch I assume it actually works.
>
> Sascha
>

It's used in __clk_register() though. Which I added as a "as close as 
clk_register() but allows static init" function.

-Saravana

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