linux-kernel - Re: [PATCH v3 2/2] irqchip: Kconfig: Added module build support for the TI interrupt aggregator

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Message-ID: <f1035052-f35f-426c-862b-72401f3cd23c@baylibre.com>
Date: Fri, 18 Oct 2024 10:01:33 +0200
From: Guillaume LA ROQUE <glaroque@...libre.com>
To: Andrew Davis <afd@...com>, Catalin Marinas <catalin.marinas@....com>,
 Will Deacon <will@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
 Santosh Shilimkar <ssantosh@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 vishalm@...com, Mattijs Korpershoek <mkorpershoek@...libre.com>,
 Kevin Hilman <khilman@...libre.com>, Nicolas Frayer <nfrayer@...libre.com>
Subject: Re: [PATCH v3 2/2] irqchip: Kconfig: Added module build support for
 the TI interrupt aggregator

Le 16/10/2024 à 15:48, Andrew Davis a écrit :
> On 10/16/24 4:41 AM, Guillaume La Roque wrote:
>> From: Nicolas Frayer <nfrayer@...libre.com>
>>
>> Added module build support in Kconfig for the TI SCI interrupt 
>> aggregator
>> driver. The driver's default build is built-in and it also depends on
>> ARCH_K3 as the driver uses some 64 bit ops and should only be built
>> for 64 bit platforms.
>>
>> Signed-off-by: Nicolas Frayer <nfrayer@...libre.com>
>> Signed-off-by: Guillaume La Roque <glaroque@...libre.com>
>> ---
>>   arch/arm64/Kconfig.platforms      | 1 -
>>   drivers/irqchip/Kconfig           | 5 +++--
>>   drivers/irqchip/irq-ti-sci-inta.c | 1 +
>>   3 files changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
>> index 393845a3ae5c..9dea47decfbd 100644
>> --- a/arch/arm64/Kconfig.platforms
>> +++ b/arch/arm64/Kconfig.platforms
>> @@ -135,7 +135,6 @@ config ARCH_K3
>>       select SOC_TI
>>       select TI_MESSAGE_MANAGER
>>       select TI_SCI_PROTOCOL
>> -    select TI_SCI_INTA_IRQCHIP
>>       select TI_K3_SOCINFO
>>       help
>>         This enables support for Texas Instruments' K3 multicore SoC
>> diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
>> index a958731404e9..9646322345e4 100644
>> --- a/drivers/irqchip/Kconfig
>> +++ b/drivers/irqchip/Kconfig
>> @@ -544,10 +544,11 @@ config TI_SCI_INTR_IRQCHIP
>>         TI System Controller, say Y here. Otherwise, say N.
>>     config TI_SCI_INTA_IRQCHIP
>> -    bool
>> -    depends on TI_SCI_PROTOCOL
>> +    tristate "TI SCI INTA Interrupt Controller"
>> +    depends on ARCH_K3 && TI_SCI_PROTOCOL
>
> You can still compile test, just gate it on 64BIT (or ARM64 if those
> 64bit ops are only available on ARM64).
>
> depends on ARCH_K3 || (COMPILE_TEST && ARM64)
>
> BTW, the last time this was posted the feedback was that if this
> was compiled as a module we might have issues with dependent drivers
> not having this IRQ ready as it may be loaded later. I think this
> would only cause probe defers if the drivers are well behaving, but
> something to double check.


we already use this patch in android kernel mainline and 6.6 without 
issue to load all drivers.

i will try with your yocto sdk before post v4 to confirm it's still OK.

Guillaume

>
> Andrew
>
>>       select IRQ_DOMAIN_HIERARCHY
>>       select TI_SCI_INTA_MSI_DOMAIN
>> +    default ARCH_K3
>>       help
>>         This enables the irqchip driver support for K3 Interrupt 
>> aggregator
>>         over TI System Control Interface available on some new TI's 
>> SoCs.
>> diff --git a/drivers/irqchip/irq-ti-sci-inta.c 
>> b/drivers/irqchip/irq-ti-sci-inta.c
>> index b83f5cbab123..a887efba262c 100644
>> --- a/drivers/irqchip/irq-ti-sci-inta.c
>> +++ b/drivers/irqchip/irq-ti-sci-inta.c
>> @@ -743,3 +743,4 @@ 
>> module_platform_driver(ti_sci_inta_irq_domain_driver);
>>     MODULE_AUTHOR("Lokesh Vutla <lokeshvutla@...com>");
>>   MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI 
>> protocol");
>> +MODULE_LICENSE("GPL");
>>