linux-kernel - Re: [PATCH 26/27] ARM: shmobile: lager-reference: Enable CMT0 in device tree

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Date:	Fri, 14 Feb 2014 22:56:59 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	linux-sh@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 26/27] ARM: shmobile: lager-reference: Enable CMT0 in
 device tree

On 02/14/2014 07:26 PM, Laurent Pinchart wrote:

>>>>>>> Enable the CMT0 device and configure channel 0 as a clock event
>>>>>>> provider.

>>>>>>> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

>>>>>>> diff --git a/arch/arm/mach-shmobile/include/mach/r8a7790.h
>>>>>>> b/arch/arm/mach-shmobile/include/mach/r8a7790.h index 0b95bab..62b31f3
>>>>>>> 100644 --- a/arch/arm/mach-shmobile/include/mach/r8a7790.h
>>>>>>> +++ b/arch/arm/mach-shmobile/include/mach/r8a7790.h
>>>>>>> @@ -29,7 +29,6 @@ enum {
>>>>>>>
>>>>>>>    };
>>>>>>>
>>>>>>>    void r8a7790_add_standard_devices(void);
>>>>>>>
>>>>>>> -void r8a7790_add_dt_devices(void);
>>>>>>>
>>>>>>>    void r8a7790_clock_init(void);
>>>>>>>    void r8a7790_pinmux_init(void);
>>>>>>>    void r8a7790_pm_init(void);
>>>>>>>
>>>>>>> diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c
>>>>>>> b/arch/arm/mach-shmobile/setup-r8a7790.c index 3e5813f..462c81f 100644
>>>>>>> --- a/arch/arm/mach-shmobile/setup-r8a7790.c
>>>>>>> +++ b/arch/arm/mach-shmobile/setup-r8a7790.c
>>>>>>> @@ -294,11 +294,6 @@ static struct resource cmt0_resources[] = {
>>>>>>>      					  &cmt##idx##_platform_data,	\
>>>>>>>      					  sizeof(struct sh_timer_config))
>>>>>>>
>>>>>>> -void __init r8a7790_add_dt_devices(void)
>>>>>>> -{
>>>>>>> -	r8a7790_register_cmt(0);
>>>>>>> -}
>>>>>>> -
>>>>>>>   void __init r8a7790_add_standard_devices(void)
>>>>>>>   {
>>>>>>>      	r8a7790_register_scif(0);
>>>>>>> @@ -311,7 +306,7 @@ void __init r8a7790_add_standard_devices(void)
>>>>>>> 	r8a7790_register_scif(7);
>>>>>>>   	r8a7790_register_scif(8);
>>>>>>>   	r8a7790_register_scif(9);
>>>>>>> -	r8a7790_add_dt_devices();
>>>>>>> +	r8a7790_register_cmt(0);
>>>>>>> 	r8a7790_register_irqc(0);
>>>>>>> 	r8a7790_register_thermal();
>>>>>>> }

>>>>>> IMHO, these 2 files should be split into a separate patch.

>>>>> That could easily be done, but why ?

>>>> It does not seem necessary to combine these changes in one patch.
>>>> Remember, Simon has separate branches for boards and SoCs. So finally
>>>> it's up to him to decide on this...

>>> Right, but in this case I need to remove the CMT platform device
>>> registration from r8a7790_add_dt_devices()

>> You're not removing anything in these 2 files, you're just replacing
>> "indirect" call to r8a7790_register_cmt(0) with direct.

> OK, I see what you mean now. Given that the patch removes the
> r8a7790_add_dt_devices() call from arch/arm/mach-shmobile/board-lager-
> reference.c, I could indeed split those two changes into a separate patch as
> there's no-one calling the function anymore. That would introduce a dependency
> between the branches, which might not be better. I'll let Simon comment on
> what he would prefer and will act accordingly.

    Yes, the branch inter-dependencies are bad too. I didn't think about it, 
sorry.

WBR, Sergei

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