From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: Sean Wang <sean.wang@mediatek.com>, Vinod Koul <vkoul@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
dmaengine <dmaengine@vger.kernel.org>,
linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>,
Rob Herring <robh+dt@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
Prabhakar <prabhakar.csengg@gmail.com>
Subject: Re: [PATCH 1/3] dmaengine: nbpfaxi: Use platform_get_irq_optional() to get the interrupt
Date: Sat, 25 Dec 2021 19:46:45 +0200 [thread overview]
Message-ID: <CAHp75VfC-1Lt2JZ-e_ReySNQTOwOfBi6JLOjEHUMNEyYk5JVyg@mail.gmail.com> (raw)
In-Reply-To: <20211222161534.1263-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
On Fri, Dec 24, 2021 at 3:14 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
>
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
>
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq_optional().
>
> There are no non-DT users for this driver so interrupt range
> (irq_res->start-irq_res->end) is no longer required and with DT we will
> be sure it will be a single IRQ resource for each index.
> for (i = 0; irqs < ARRAY_SIZE(irqbuf); i++) {
> - irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
> - if (!irq_res)
> + irq = platform_get_irq_optional(pdev, i);
> + if (irq == -ENXIO)
> break;
> -
> - for (irq = irq_res->start; irq <= irq_res->end;
> - irq++, irqs++)
> - irqbuf[irqs] = irq;
> + if (irq < 0)
> + return irq;
> + irqbuf[irqs++] = irq;
> }
Same comment as per other patch(es), i.e. consider 0 as no IRQ.
--
With Best Regards,
Andy Shevchenko
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next prev parent reply other threads:[~2021-12-25 17:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 16:15 [PATCH 0/3] dmaengine: Use platform_get_irq*() variants to fetch IRQ's Lad Prabhakar
2021-12-22 16:15 ` [PATCH 1/3] dmaengine: nbpfaxi: Use platform_get_irq_optional() to get the interrupt Lad Prabhakar
2021-12-25 17:46 ` Andy Shevchenko [this message]
2021-12-25 23:50 ` Lad, Prabhakar
2021-12-22 16:15 ` [PATCH 2/3] dmaengine: mediatek: mtk-hsdma: Use platform_get_irq() " Lad Prabhakar
2021-12-22 16:15 ` [PATCH 3/3] dmaengine: mediatek-cqdma: " Lad Prabhakar
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