linux-kernel - Re: [PATCH V3 7/7] ARM: DRA: Enable Crossbar IP support for DRA7XX

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Message-ID: <52839C31.7070709@ti.com>
Date:	Wed, 13 Nov 2013 21:05:13 +0530
From:	Sricharan R <r.sricharan@...com>
To:	Nishanth Menon <nm@...com>
CC:	Rajendra Nayak <rnayak@...com>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <linus.walleij@...aro.org>,
	<linux@....linux.org.uk>, <tony@...mide.com>,
	<marc.zyngier@....com>, <grant.likely@...aro.org>,
	<mark.rutland@....com>, <robherring2@...il.com>,
	<tglx@...utronix.de>, <santosh.shilimkar@...com>,
	<galak@...eaurora.org>
Subject: Re: [PATCH V3 7/7] ARM: DRA: Enable Crossbar IP support for DRA7XX

On Wednesday 13 November 2013 09:02 PM, Nishanth Menon wrote:
> On 11/11/2013 11:47 PM, Sricharan R wrote:
>> Hi Rajendra,
>>
>> On Tuesday 12 November 2013 11:11 AM, Rajendra Nayak wrote:
>>> On Tuesday 05 November 2013 06:44 PM, Sricharan R wrote:
>>>> Enable the crossbar IP support for DRA7xx soc.
>>>>
>>>> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
>>>> Cc: Rajendra Nayak <rnayak@...com>
>>>> Cc: Tony Lindgren <tony@...mide.com>
>>>> Signed-off-by: Sricharan R <r.sricharan@...com>
>>>> ---
>>>>  arch/arm/mach-omap2/Kconfig        |    1 +
>>>>  arch/arm/mach-omap2/omap4-common.c |    4 ++++
>>>>  2 files changed, 5 insertions(+)
>>>>
>>>> diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
>>>> index b5fb5f7..2086c65 100644
>>>> --- a/arch/arm/mach-omap2/Kconfig
>>>> +++ b/arch/arm/mach-omap2/Kconfig
>>>> @@ -141,6 +141,7 @@ config SOC_DRA7XX
>>>>  	select ARM_GIC
>>>>  	select HAVE_SMP
>>>>  	select COMMON_CLK
>>>> +	select IRQ_CROSSBAR
>>>>  
>>>>  comment "OMAP Core Type"
>>>>  	depends on ARCH_OMAP2
>>>> diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
>>>> index 5791143..274cbfa 100644
>>>> --- a/arch/arm/mach-omap2/omap4-common.c
>>>> +++ b/arch/arm/mach-omap2/omap4-common.c
>>>> @@ -22,6 +22,7 @@
>>>>  #include <linux/of_platform.h>
>>>>  #include <linux/export.h>
>>>>  #include <linux/irqchip/arm-gic.h>
>>>> +#include <linux/irqchip/irq-crossbar.h>
>>>>  #include <linux/of_address.h>
>>>>  #include <linux/reboot.h>
>>>>  
>>>> @@ -282,9 +283,12 @@ void __init omap_gic_of_init(void)
>>>>  
>>>>  skip_errata_init:
>>>>  	omap_wakeupgen_init();
>>>> +	if (soc_is_dra7xx())
>>>> +		crossbar_init();
>>> Its good if this is called irqcrossbar_init() to avoid confusion
>>> with the dma crossbar which also exists in dra7 devices.
>>>
>>  Ya makes sense. Will change this.
> Also why not call it without explicit soc check? there is already
> parse for of_find_matching_node(NULL, crossbar_match); to see if we
> have a match in the crossbar_init. OR call it from dra7 init without
> SoC check dependency?
>
> Rationale - with more TI SoCs trending towards crossbar, we dont need
> to keep adding to the soc_is checks, further, we intend to remove
> soc_is checks in it's entirety..
>
>
Oh yes. I missed this. Thanks for pointing. Will correct.

Regards,
 Sricharan
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