From: Marc Zyngier <marc.zyngier@arm.com>
To: Paul Cercueil <paul@crapouillou.net>
Cc: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Lee Jones <lee.jones@linaro.org>,
linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 6/9] irqchip: Add the ingenic-tcu-intc driver
Date: Sat, 20 Jan 2018 13:06:49 +0000 [thread overview]
Message-ID: <20180120130649.7f326f75@why.wild-wind.fr.eu.org> (raw)
In-Reply-To: <1515687945.2170.1@smtp.crapouillou.net>
On Thu, 11 Jan 2018 17:25:45 +0100
Paul Cercueil <paul@crapouillou.net> wrote:
> Hi Marc,
>
> >> +static int __init ingenic_tcu_intc_of_init(struct device_node
> >> *node,
> >> + struct device_node *parent)
> >> +{
> >> + struct irq_domain *domain;
> >> + struct irq_chip_generic *gc;
> >> + struct irq_chip_type *ct;
> >> + int err, i, num_parent_irqs;
> >> + unsigned int parent_irqs[3];
> >
> > 3 parent interrupts? Really? How do you pick one? Also, given the
> > useage
> > model below, "int" is the wrong type. Probably should be u32.
>
> See below.
>
> >> + struct regmap *map;
> >> +
> >> + num_parent_irqs = of_property_count_elems_of_size(
> >> + node, "interrupts", 4);
> >
> > Nit: on a single line, as here is nothing that hurts my eyes more than
> > reading something like(
> > this). Also, 4 is better expressed as sizeof(u32).
>
> That will make checkpatch.pl unhappy :(
And I don't care about checkpatch. I maintain the irqchip stuff, while
checkpatch doesn't. Hence, I win.
>
> >> + if (num_parent_irqs < 0 || num_parent_irqs >
> >> ARRAY_SIZE(parent_irqs))
> >> + return -EINVAL;
> >> +
> >> + map = syscon_node_to_regmap(node->parent);
> >> + if (IS_ERR(map))
> >> + return PTR_ERR(map);
> >> +
> >> + domain = irq_domain_add_linear(node, 32, &irq_generic_chip_ops,
> >> NULL);
> >> + if (!domain)
> >> + return -ENOMEM;
> >> +
> >> + err = irq_alloc_domain_generic_chips(domain, 32, 1, "TCU",
> >> + handle_level_irq, 0, IRQ_NOPROBE | IRQ_LEVEL, 0);
> >> + if (err)
> >> + goto out_domain_remove;
> >> +
> >> + gc = irq_get_domain_generic_chip(domain, 0);
> >> + ct = gc->chip_types;
> >> +
> >> + gc->wake_enabled = IRQ_MSK(32);
> >> + gc->private = map;
> >> +
> >> + ct->regs.disable = TCU_REG_TMSR;
> >> + ct->regs.enable = TCU_REG_TMCR;
> >> + ct->regs.ack = TCU_REG_TFCR;
> >> + ct->chip.irq_unmask = ingenic_tcu_gc_unmask_enable_reg;
> >> + ct->chip.irq_mask = ingenic_tcu_gc_mask_disable_reg;
> >> + ct->chip.irq_mask_ack = ingenic_tcu_gc_mask_disable_reg_and_ack;
> >> + ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE;
> >> +
> >> + /* Mask all IRQs by default */
> >> + regmap_write(map, TCU_REG_TMSR, IRQ_MSK(32));
> >> +
> >> + for (i = 0; i < num_parent_irqs; i++) {
> >> + parent_irqs[i] = irq_of_parse_and_map(node, i);
> >> + if (!parent_irqs[i]) {
> >> + err = -EINVAL;
> >> + goto out_unmap_irqs;
> >> + }
> >> +
> >> + irq_set_chained_handler_and_data(parent_irqs[i],
> >> + ingenic_tcu_intc_cascade, domain);
> >> + }
> >
> > I don't get the multiple parent irq at all. How are the source
> > interrupt routed to the various cascades?
>
> On JZ4740, channels 0 and 1 have their own interrupt, and channels
> 2-7 share one interrupt line.
> On JZ4770 and JZ4780, the OST (OS timer) channel has its own
> interrupt, channel 5 has its own interrupt, and channels 0-4 and 6-7
> share one interrupt line.
What a mess. I suppose you get a shared status register to find out
which channel has fired?
> To keep things simple, we register the same interrupt handler for the
> three parent interrupts.
Please add a comment to that effect, documenting the above HW blunder.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2018-01-20 13:06 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-29 12:59 [PATCH 0/6] Ingenic JZ47xx TCU drivers Paul Cercueil
2017-12-29 12:59 ` [PATCH 1/6] mfd: syscon: Add ingenic-tcu.h header Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 " Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 2/6] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-01-03 20:49 ` Rob Herring
2018-01-01 14:33 ` [PATCH v2 3/6] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
[not found] ` <20180101143344.2099-3-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-03 20:58 ` Rob Herring
2018-01-03 21:50 ` Paul Cercueil
2018-01-01 14:33 ` [PATCH v2 4/6] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2018-01-02 19:13 ` Stephen Boyd
2018-01-02 20:08 ` Paul Cercueil
2018-01-02 22:59 ` Stephen Boyd
2018-01-01 14:33 ` [PATCH v2 5/6] clocksource: Add a new timer-ingenic driver Paul Cercueil
2018-01-03 21:08 ` Rob Herring
2018-01-03 21:56 ` Paul Cercueil
[not found] ` <1515016576.1642.2-nb6JAIIttxhEPksTRSfcJOTW4wlIGRCZ@public.gmane.org>
2018-01-05 23:27 ` Rob Herring
[not found] ` <CAL_Jsq+DQnfX29AOJWMtH9ZB7=neOVwiyZggEuwOmazzVQ6MVg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-05 23:48 ` Paul Cercueil
[not found] ` <1515196105.2058.1-nb6JAIIttxhEPksTRSfcJOTW4wlIGRCZ@public.gmane.org>
2018-01-09 1:09 ` Rob Herring
2018-01-01 14:33 ` [PATCH v2 6/6] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2018-01-02 15:51 ` [PATCH v2 1/6] mfd: syscon: Add ingenic-tcu.h header Lee Jones
2018-01-10 22:48 ` [PATCH v3 1/9] " Paul Cercueil
2018-01-10 22:48 ` [PATCH v3 3/9] doc: dt-bindings: Add doc for Ingenic TCU IRQ driver Paul Cercueil
[not found] ` <20180110224838.16711-3-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-19 21:05 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 4/9] doc: dt-bindings: Add doc for the Ingenic TCU clocks driver Paul Cercueil
[not found] ` <20180110224838.16711-4-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-19 21:11 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 5/9] doc: dt-bindings: Add doc for the Ingenic TCU timers driver Paul Cercueil
2018-01-19 21:12 ` Rob Herring
2018-01-10 22:48 ` [PATCH v3 6/9] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
[not found] ` <20180110224838.16711-6-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-11 15:38 ` Marc Zyngier
2018-01-11 16:25 ` Paul Cercueil
2018-01-20 13:06 ` Marc Zyngier [this message]
2018-01-22 9:26 ` Lee Jones
2018-01-22 9:55 ` Marc Zyngier
[not found] ` <bdae1be4-0ed2-1b7d-8b08-7439ce06e762-5wv7dgnIgG8@public.gmane.org>
2018-01-22 11:46 ` Lee Jones
2018-01-10 22:48 ` [PATCH v3 7/9] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
[not found] ` <20180110224838.16711-7-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-27 0:37 ` Stephen Boyd
2018-01-10 22:48 ` [PATCH v3 8/9] clocksource: Add a new timer-ingenic driver Paul Cercueil
[not found] ` <20180110224838.16711-8-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-11 14:53 ` Rob Herring
[not found] ` <CAL_Jsq+StZS1+qTd9CG1X2_3ay5onMgEmYG9MRUVWs-4K4-EZA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-01-11 16:16 ` Paul Cercueil
2018-01-10 22:48 ` [PATCH v3 9/9] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
[not found] ` <20180110224838.16711-1-paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org>
2018-01-10 22:48 ` [PATCH v3 2/9] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 1/8] mfd: syscon: Add ingenic-tcu.h header Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2018-03-19 21:27 ` Stephen Boyd
2018-03-20 7:15 ` Mathieu Malaterre
2018-03-28 15:04 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks, Paul Cercueil
2018-03-28 18:35 ` [PATCH v4 2/8] dt-bindings: ingenic: Add DT bindings for TCU clocks Mathieu Malaterre
2018-03-17 23:28 ` [PATCH v4 3/8] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2018-03-17 23:52 ` Randy Dunlap
2018-03-28 14:59 ` [PATCH v4 3/8] doc: Add doc for the Ingenic TCU hardware, Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2018-03-20 8:52 ` Marc Zyngier
2018-03-28 15:09 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers, Paul Cercueil
2018-03-27 14:46 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Rob Herring
2018-03-28 15:33 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers, Paul Cercueil
2018-03-28 16:28 ` [PATCH v4 4/8] dt-bindings: Add doc for the Ingenic TCU drivers Rob Herring
2018-03-29 15:59 ` Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 5/8] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
2018-03-17 23:28 ` [PATCH v4 6/8] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2018-03-17 23:29 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Paul Cercueil
2018-03-24 6:26 ` Daniel Lezcano
2018-03-28 15:15 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver, Paul Cercueil
2018-03-28 16:25 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Daniel Lezcano
2018-03-29 14:52 ` Paul Cercueil
2018-03-31 8:10 ` Daniel Lezcano
2018-03-31 17:46 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver, Paul Cercueil
2018-04-03 9:59 ` [PATCH v4 7/8] clocksource: Add a new timer-ingenic driver Daniel Lezcano
2018-03-17 23:29 ` [PATCH v4 8/8] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2018-03-18 22:13 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Daniel Lezcano
2018-03-28 15:01 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers, Paul Cercueil
2018-03-28 15:10 ` [PATCH v4 0/8] Ingenic JZ47xx Timer/Counter Unit drivers Daniel Lezcano
2018-01-23 9:52 ` [PATCH v3 1/9] mfd: syscon: Add ingenic-tcu.h header Lee Jones
2017-12-29 12:59 ` [PATCH 2/6] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2017-12-29 12:59 ` [PATCH 3/6] irqchip: Add the ingenic-tcu-intc driver Paul Cercueil
2017-12-29 12:59 ` [PATCH 4/6] clk: ingenic: Add JZ47xx TCU clocks driver Paul Cercueil
2017-12-29 14:02 ` Paul Cercueil
2018-01-01 12:47 ` kbuild test robot
2017-12-29 12:59 ` [PATCH 5/6] clocksource: Add a new timer-ingenic driver Paul Cercueil
2017-12-29 12:59 ` [PATCH 6/6] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
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