linux-kernel - Re: [RFC PATCH 4/5] irqchip: RISC-V Local Interrupt Controller Driver

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Message-ID: <20180905185838.GC15741@infradead.org>
Date:   Wed, 5 Sep 2018 11:58:38 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Anup Patel <anup@...infault.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Atish Patra <atish.patra@....com>,
        linux-riscv@...ts.infradead.org,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Palmer Dabbelt <palmer@...belt.com>
Subject: Re: [RFC PATCH 4/5] irqchip: RISC-V Local Interrupt Controller Driver

On Wed, Sep 05, 2018 at 11:39:01AM +0530, Anup Patel wrote:
> Previously submitted driver, registered separate irq_domain for
> each CPU and local IRQs were registered as regular IRQs to IRQ
> subsystem.
> (Refer, https://www.spinics.net/lists/devicetree/msg241230.html)

And we reject that driver approach for good reason and are now
doing the architectualy low-level irq handling in common code
without any need whatsover to duplicate information in the
privileged spec in DT.