From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47167C43387 for ; Fri, 18 Jan 2019 13:12:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14B5520652 for ; Fri, 18 Jan 2019 13:12:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727581AbfARNMo (ORCPT ); Fri, 18 Jan 2019 08:12:44 -0500 Received: from foss.arm.com ([217.140.101.70]:56818 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726593AbfARNMn (ORCPT ); Fri, 18 Jan 2019 08:12:43 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E90BD80D; Fri, 18 Jan 2019 05:12:42 -0800 (PST) Received: from [10.1.196.62] (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 423FB3F5C1; Fri, 18 Jan 2019 05:12:40 -0800 (PST) Subject: Re: [PATCH v5 04/14] spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips To: Brian Masney Cc: linus.walleij@linaro.org, sboyd@kernel.org, bjorn.andersson@linaro.org, andy.gross@linaro.org, shawnguo@kernel.org, dianders@chromium.org, linux-gpio@vger.kernel.org, nicolas.dechesne@linaro.org, niklas.cassel@linaro.org, david.brown@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, thierry.reding@gmail.com, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20190117003234.22127-1-masneyb@onstation.org> <20190117003234.22127-5-masneyb@onstation.org> <20190118122716.GA32143@basecamp> From: Marc Zyngier Openpgp: preference=signencrypt Autocrypt: addr=marc.zyngier@arm.com; prefer-encrypt=mutual; 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Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190118122716.GA32143@basecamp> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18/01/2019 12:27, Brian Masney wrote: > Hi Marc, > > On Thu, Jan 17, 2019 at 11:22:59AM +0000, Marc Zyngier wrote: >>> -static int qpnpint_irq_domain_map(struct irq_domain *d, >>> - unsigned int virq, >>> - irq_hw_number_t hwirq) >>> -{ >>> - struct spmi_pmic_arb *pmic_arb = d->host_data; >>> >>> +static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, >>> + struct irq_domain *domain, unsigned int virq, >>> + irq_hw_number_t hwirq) >>> +{ >>> dev_dbg(&pmic_arb->spmic->dev, "virq = %u, hwirq = %lu\n", virq, hwirq); >>> >>> - irq_set_chip_and_handler(virq, &pmic_arb_irqchip, handle_level_irq); >>> - irq_set_chip_data(virq, d->host_data); >>> - irq_set_noprobe(virq); >>> + irq_domain_set_info(domain, virq, hwirq, &pmic_arb_irqchip, pmic_arb, >>> + handle_level_irq, NULL, NULL); >> >> I understand you haven't changed the existing semantic here by always >> setting the handler to handle_level_irq. But is that guaranteed to >> always be the case? See below. >> >>> +} >>> + >>> +static int qpnpint_irq_domain_alloc(struct irq_domain *domain, >>> + unsigned int virq, unsigned int nr_irqs, >>> + void *data) >>> +{ >>> + struct spmi_pmic_arb *pmic_arb = domain->host_data; >>> + struct irq_fwspec *fwspec = data; >>> + irq_hw_number_t hwirq; >>> + unsigned int type; >>> + int ret, i; >>> + >>> + ret = qpnpint_irq_domain_translate(domain, fwspec, &hwirq, &type); >> >> Here, you extract the trigger from DT. >> >>> + if (ret) >>> + return ret; >>> + >>> + for (i = 0; i < nr_irqs; i++) >>> + qpnpint_irq_domain_map(pmic_arb, domain, virq + i, hwirq + i); >> >> Shouldn't you propagate it into the mapping function so that the handler >> can be selected accordingly? Or does the interrupt controller convert >> edge signals to level somehow? > > qpnpint_irq_set_type() calls irq_set_handler_locked() to set the hander > to be either handle_edge_irq() or handle_level_irq(). So the handler is > initially setup incorrectly in some cases, but then setup correctly (via > __irq_set_trigger) when __setup_irq() is called by > request_threaded_irq(). > > It looks like that this will cause problems with shared IRQs to work as > expected. > > I can rework this code and get this fixed. It'd definitely be worth it, thanks. M. -- Jazz is not dead. It just smells funny...