linux-kernel - Re: [PATCH v4 08/10] irqchip: Add RISC-V advanced PLIC driver

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Date:   Fri, 23 Jun 2023 13:49:47 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Anup Patel <apatel@...tanamicro.com>
Cc:     Saravana Kannan <saravanak@...gle.com>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Atish Patra <atishp@...shpatra.org>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor@...nel.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, iommu@...ts.linux.dev,
        Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [PATCH v4 08/10] irqchip: Add RISC-V advanced PLIC driver

[here, let me trim all of this nonsense...]

On Fri, 23 Jun 2023 12:47:00 +0100,
Anup Patel <apatel@...tanamicro.com> wrote:
> > No. My previous email asking you to NOT use IRQCHIP_DECLARE() and
> > instead use IRQCHIP_PLATFORM_DRIVER_BEGIN/END() macros.
> 
> I tried IRQCHIP_PLATFORM_DRIVER_BEGIN/END() macros but these
> macros are not suitable for APLIC driver because we need platform device
> pointer in the APLIC probe() to create platform MSI device domain (refer,
> platform_msi_create_device_domain()).

Oh come on. How hard have you tried? Have you even looked at the other
drivers in the tree to see how they solve this insurmountable problem
with a *single* line of code?

        pdev = of_find_device_by_node(node);

That's it.

> Further, I tried setting the "suppress_bind_attrs" flag in "struct
> platform_driver aplic_driver" just like the
> IRQCHIP_PLATFORM_DRIVER_END() macro but this did not work.

I'm not sure how relevant this is to the conversation.

	M.

-- 
Without deviation from the norm, progress is not possible.