linux-kernel - Re: [PATCH 1/2] irqchip: define EXYNOS_IRQ

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Date:   Sun, 8 Dec 2019 07:24:49 +0900
From:   Hyunki Koo <hyunki00.koo@...il.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     linux@...linux.org.uk, kgene@...nel.org, tglx@...utronix.de,
        jason@...edaemon.net, maz@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kernel-team@...roid.com, Hyunki Koo <hyunki00.koo@...sung.com>
Subject: Re: [PATCH 1/2] irqchip: define EXYNOS_IRQ_COMBINER


On 19. 12. 7. 오후 10:37, Krzysztof Kozlowski wrote:
> On Sat, 7 Dec 2019 at 14:28, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>> On Sat, Dec 07, 2019 at 10:00:48PM +0900, Hyunki Koo wrote:
>>> From: Hyunki Koo <hyunki00.koo@...sung.com>
>>>
>>> Not all exynos device have IRQ_COMBINER.
>>> Thus add the config for EXYNOS_IRQ_COMBINER.
>>>
>>> Signed-off-by: Hyunki Koo <hyunki00.koo@...sung.com>
>>> ---
>>>   drivers/irqchip/Kconfig  | 7 +++++++
>>>   drivers/irqchip/Makefile | 2 +-
>>>   2 files changed, 8 insertions(+), 1 deletion(-)
>>>
>> Hi,
>>
>> There is no changelog and versioning of this patch so I do not
>> understand how it differs with previous. It's a resend? v2? It brings
>> the confusion and looks like you're ignoring previous comments.
>>
>> Looks the same and looks like breaking Exynos platforms in the same way.
>>
>> If you not want to skip combiner on ARMv8, it makes sense, then please
>> follow the approach we did for Pinctrl drivers (PINCTRL_EXYNOS_ARM and
>> PINCTRL_EXYNOS_ARM64).
>>
>> Best regards,
>> Krzysztof
> Ah, now I see the second patch. Still you break bisect which requires
> specific ordering of patches or squashing them into one. Optionally
> this could be default=y if ARCH_EXYNOS && ARM. I prefer just squashing
> both into one patch in this case.

you mean squashing two files arch/arm/mach-exynos/Kconfig and 
arch/arm/mach-exynos/Kconfig into one patch

or squashing into only one file like blow?

+config EXYNOS_IRQ_COMBINER
+       bool "Samsung Exynos IRQ combiner support"
+       depends on (ARCH_EXYNOS  && ARM) || COMPILE_TEST
+       default y

I prefer first one (squashing two files into one patch)

>
>>> diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
>>> index ba152954324b..3ed7b7f2ae26 100644
>>> --- a/drivers/irqchip/Kconfig
>>> +++ b/drivers/irqchip/Kconfig
>>> @@ -499,4 +499,11 @@ config SIFIVE_PLIC
>>>
>>>           If you don't know what to do here, say Y.
>>>
>>> +config EXYNOS_IRQ_COMBINER
>>> +     bool "Samsung Exynos IRQ combiner support"
> Now point it to be visible. Only for COMPILE_TEST
>
>>> +     depends on ARCH_EXYNOS
> Since you make it a separate option, make it COMPILE_TEST.

Is this  good ?

+config EXYNOS_IRQ_COMBINER

+       bool "Samsung Exynos IRQ combiner support"
+       depends on (ARCH_EXYNOS  && ARM) || COMPILE_TEST

>
> Best regards,
> Krzysztof
>
>>> +     help
>>> +       Say yes here to add support for the IRQ combiner devices embedded
>>> +       in Samsung Exynos chips.
>>> +
>>>   endmenu
>>> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
>>> index e806dda690ea..60d7c7260fc3 100644
>>> --- a/drivers/irqchip/Makefile
>>> +++ b/drivers/irqchip/Makefile
>>> @@ -9,7 +9,7 @@ obj-$(CONFIG_ARCH_BCM2835)            += irq-bcm2835.o
>>>   obj-$(CONFIG_ARCH_BCM2835)           += irq-bcm2836.o
>>>   obj-$(CONFIG_DAVINCI_AINTC)          += irq-davinci-aintc.o
>>>   obj-$(CONFIG_DAVINCI_CP_INTC)                += irq-davinci-cp-intc.o
>>> -obj-$(CONFIG_ARCH_EXYNOS)            += exynos-combiner.o
>>> +obj-$(CONFIG_EXYNOS_IRQ_COMBINER)    += exynos-combiner.o
>>>   obj-$(CONFIG_FARADAY_FTINTC010)              += irq-ftintc010.o
>>>   obj-$(CONFIG_ARCH_HIP04)             += irq-hip04.o
>>>   obj-$(CONFIG_ARCH_LPC32XX)           += irq-lpc32xx.o
>>> --
>>> 2.17.1
>>>