linux-kernel - Re: [PATCH V6 02/15] ARM: OMAP2+: AM33XX: add lateinit hook for calling pm late init

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Date:	Thu, 10 Oct 2013 10:23:50 -0500
From:	Joel Fernandes <joelf@...com>
To:	Nishanth Menon <nm@...com>
CC:	Kevin Hilman <khilman@...aro.org>,
	Benoit Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Tero Kristo <t-kristo@...com>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Paul Walmsley <paul@...an.com>
Subject: Re: [PATCH V6 02/15] ARM: OMAP2+: AM33XX: add lateinit hook for calling
 pm late init

On 10/10/2013 10:20 AM, Joel Fernandes wrote:
> On 10/10/2013 08:32 AM, Nishanth Menon wrote:
>> On 00:32-20131010, Joel Fernandes wrote:
>>> On 10/09/2013 06:24 PM, Nishanth Menon wrote:
>>>> Call OMAP2+ generic lateinit hook from AM specific late init hook.
>>>> This allows the generic late initializations such as cpufreq hooks
>>>> to be active.
>>>>
>>>> Cc: Benoit Cousson <bcousson@...libre.com>
>>>> Cc: Kevin Hilman <khilman@...prootsystems.com>
>>>> Cc: Paul Walmsley <paul@...an.com>
>>>> Cc: Tony Lindgren <tony@...mide.com>
>>>> Signed-off-by: Nishanth Menon <nm@...com>
>>>> ---
>>>>  arch/arm/mach-omap2/board-generic.c |    1 +
>>>>  arch/arm/mach-omap2/common.h        |    1 +
>>>>  arch/arm/mach-omap2/io.c            |    6 ++++++
>>>>  3 files changed, 8 insertions(+)
>>>>
>>>> diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
>>>> index 87162e1..b474498 100644
>>>> --- a/arch/arm/mach-omap2/board-generic.c
>>>> +++ b/arch/arm/mach-omap2/board-generic.c
>>>> @@ -180,6 +180,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)")
>>>>  	.init_irq	= omap_intc_of_init,
>>>>  	.handle_irq	= omap3_intc_handle_irq,
>>>>  	.init_machine	= omap_generic_init,
>>>> +	.init_late	= am33xx_init_late,
>>>
>>> Instead of adding a new a *_init_late function for every platform, perhaps
>>> better to just do:
>>> .init_late	= omap2_common_pm_late_init;
>>>
>>> since that's the only function you're calling.
>>>
>>> Later if more functions are added, then it can be wrapped around.
>>
>> And what benefit would that give us? we break consistency of functions
>> available in io.c, considering the work we have already done in
>> out-of-tree patches on ti-forks, we *do know* that there is more
>> incoming and has to be done anyways, I prefer having symmetric
>> functions and a placeholder that folks can add on to.
>>
> 
> Ok, sure if you think such placeholders are right way and there's more code
> later to be added to init_late callbacks.
> 
> Adding 6 lines of identical code for every platform seems redundant, I'd just
> define an omap_common_late_init for all platforms for now, and then fork off for
> the future differences. That way we save on LOC and readability in the header as
> well. Your call.

I see a function of that name already exists. I guess you can leave your patch
as is then and not have to do this.

regards,

-Joel

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