linux-kernel - Re: [PATCH v2 1/2] clk: Disable unused clocks after deferred probing is done

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Date:	Wed, 15 May 2013 21:34:03 -0700
From:	Saravana Kannan <skannan@...eaurora.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Mike Turquette <mturquette@...aro.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	linux-arm-msm@...r.kernel.org, Stephen Boyd <sboyd@...eaurora.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/2] clk: Disable unused clocks after deferred probing
 is done

On 05/09/2013 11:35 AM, Saravana Kannan wrote:
> With deferred probing, late_initcall() is too soon to declare a clock as
> unused. Wait for deferred probing to finish before declaring a clock as
> unused. Since deferred probing is done in late_initcall(), do the unused
> check to late_initcall_sync.
>
> Signed-off-by: Saravana Kannan <skannan@...eaurora.org>
> ---
>   drivers/clk/clk.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index fe4055f..5ecb64c 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -534,7 +534,7 @@ static int clk_disable_unused(void)
>
>   	return 0;
>   }
> -late_initcall(clk_disable_unused);
> +late_initcall_sync(clk_disable_unused);
>
>   /***    helper functions   ***/

Mike,

Thoughts? Picking it up? Removing the existing auto-disable code (I 
think they are still useful)?

-Saravana


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