From: Mark Rutland <mark.rutland@arm.com>
To: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Nicolas Ferre <nicolas.ferre@atmel.com>,
Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <Pawel.Moll@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v4 2/5] irqchip: add virtual demultiplexer implementation
Date: Tue, 10 Feb 2015 15:48:38 +0000 [thread overview]
Message-ID: <20150210154838.GG9432@leverpostej> (raw)
In-Reply-To: <1422527620-8308-3-git-send-email-boris.brezillon@free-electrons.com>
[...]
> +static int __init virt_irq_demux_of_init(struct device_node *node,
> + struct device_node *parent)
> +{
> + struct irq_chip_virt_demux *demux;
> + unsigned int irq;
> + u32 valid_irqs;
> + int ret;
> +
> + irq = irq_of_parse_and_map(node, 0);
> + if (!irq) {
> + pr_err("Failed to retrieve virt irq demuxer source\n");
> + return -EINVAL;
> + }
> +
> + ret = of_property_read_u32(node, "irqs", &valid_irqs);
> + if (ret) {
> + pr_err("Invalid of missing 'irqs' property\n");
> + return ret;
> + }
> +
> + demux = irq_alloc_virt_demux_chip(irq, valid_irqs,
> + IRQ_NOREQUEST | IRQ_NOPROBE |
> + IRQ_NOAUTOEN, 0);
> + if (!demux) {
> + pr_err("Failed to allocate virt irq demuxer struct\n");
> + return -ENOMEM;
> + }
> +
> + demux->domain = irq_domain_add_linear(node, BITS_PER_LONG,
> + &irq_virt_demux_domain_ops,
> + demux);
> + if (!demux->domain) {
> + ret = -ENOMEM;
> + goto err_free_demux;
> + }
> +
> + ret = irq_set_handler_data(irq, demux);
> + if (ret) {
> + pr_err("Failed to assign handler data\n");
> + goto err_free_domain;
> + }
> +
> + irq_set_chained_handler_nostartup(irq, irq_virt_demux_handler);
> +
> + return 0;
> +
> +err_free_domain:
> + irq_domain_remove(demux->domain);
> +
> +err_free_demux:
> + kfree(demux);
> +
> + return ret;
> +}
> +IRQCHIP_DECLARE(virt_irq_demux, "virtual,irq-demux", virt_irq_demux_of_init);
As mentioned on the DT binding patch, I really don't think this should
be in the DT. It corresponds only to Linux internal details, not a piece
of hardware. If we need this internally, I don't see why it can't be
instanciated as required.
If we _must_ have this in the DT, I have concerns with the binding
w.r.t. the "irqs" property being a 32-bit bitmask (as opposed to say
being something like "num-irqs" which could be far larger, and is
easuier to read).
Thanks,
Mark.
next prev parent reply other threads:[~2015-02-10 15:49 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 10:33 [PATCH v4 0/5] ARM: at91: fix irq_pm_install_action WARNING Boris Brezillon
2015-01-29 10:33 ` [PATCH v4 1/5] genirq: Authorize chained handlers to remain disabled when initialized Boris Brezillon
2015-01-29 10:33 ` [PATCH v4 2/5] irqchip: add virtual demultiplexer implementation Boris Brezillon
2015-02-10 15:00 ` Peter Zijlstra
2015-02-10 15:20 ` Boris Brezillon
2015-02-10 15:43 ` [PATCH] genirq: fix virtual irq demuxer related comments Boris Brezillon
2015-02-10 16:14 ` Peter Zijlstra
2015-02-20 16:12 ` Mark Rutland
2015-02-20 16:17 ` Peter Zijlstra
2015-02-10 15:48 ` Mark Rutland [this message]
2015-01-29 10:33 ` [PATCH v4 3/5] irqchip: Add DT binding doc for the virtual irq demuxer chip Boris Brezillon
2015-02-10 15:36 ` Mark Rutland
2015-02-10 15:52 ` Boris Brezillon
2015-02-10 16:06 ` Boris Brezillon
2015-02-10 16:16 ` Mark Rutland
2015-02-10 16:20 ` Boris Brezillon
2015-02-10 20:48 ` Mark Rutland
2015-02-11 8:53 ` Boris Brezillon
2015-02-11 11:11 ` Mark Rutland
2015-02-11 12:24 ` Boris Brezillon
2015-02-11 12:36 ` Mark Rutland
2015-02-11 13:38 ` Alexandre Belloni
2015-02-11 13:48 ` Mark Rutland
2015-02-11 14:55 ` Rafael J. Wysocki
2015-02-11 14:43 ` Mark Rutland
2015-02-11 15:17 ` Rafael J. Wysocki
2015-02-11 15:03 ` Boris Brezillon
2015-02-11 15:39 ` Rafael J. Wysocki
2015-02-11 15:23 ` Mark Rutland
2015-02-11 15:12 ` Mark Rutland
2015-02-11 15:51 ` Rafael J. Wysocki
2015-02-11 15:57 ` Mark Rutland
2015-02-11 16:15 ` Boris Brezillon
2015-02-11 16:32 ` Mark Rutland
2015-02-11 16:38 ` Boris Brezillon
2015-02-11 17:17 ` Mark Rutland
2015-02-20 14:22 ` Mark Rutland
2015-02-20 14:53 ` Boris Brezillon
2015-02-20 15:16 ` Mark Rutland
2015-02-23 17:00 ` Boris Brezillon
2015-02-23 18:14 ` Mark Rutland
2015-02-23 20:16 ` Boris Brezillon
2015-02-11 16:42 ` Rafael J. Wysocki
2015-02-11 16:28 ` Boris Brezillon
2015-02-11 17:13 ` Mark Rutland
2015-02-11 17:29 ` Boris Brezillon
2015-02-12 10:52 ` Mark Rutland
2015-02-12 11:09 ` Boris Brezillon
2015-02-12 11:23 ` Mark Rutland
2015-02-16 9:49 ` Peter Zijlstra
2015-02-16 9:28 ` Peter Zijlstra
2015-02-16 12:23 ` Mark Rutland
2015-02-19 1:16 ` Rafael J. Wysocki
2015-02-19 11:23 ` Mark Rutland
2015-02-19 22:35 ` Rafael J. Wysocki
2015-02-20 10:31 ` Mark Rutland
2015-02-24 1:02 ` Rafael J. Wysocki
2015-02-24 8:42 ` Boris Brezillon
2015-02-11 14:45 ` Boris Brezillon
2015-02-11 14:39 ` Rafael J. Wysocki
2015-02-11 9:11 ` Peter Zijlstra
2015-02-11 11:15 ` Mark Rutland
2015-02-11 14:31 ` Rafael J. Wysocki
2015-02-11 14:14 ` Mark Rutland
2015-02-11 15:07 ` Rafael J. Wysocki
2015-02-11 15:03 ` Mark Rutland
2015-02-11 14:34 ` Rafael J. Wysocki
2015-01-29 10:33 ` [PATCH v4 4/5] ARM: at91/dt: select VIRT_IRQ_DEMUX for all at91 SoCs Boris Brezillon
2015-01-29 10:33 ` [PATCH v4 5/5] ARM: at91/dt: define a virtual irq demultiplexer chip connected on irq1 Boris Brezillon
2015-02-09 15:47 ` [PATCH v4 0/5] ARM: at91: fix irq_pm_install_action WARNING Boris Brezillon
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