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Wed, 20 Nov 2019 06:59:28 +0000 Received: from CH2PR13MB3368.namprd13.prod.outlook.com ([fe80::853e:1256:311e:d29]) by CH2PR13MB3368.namprd13.prod.outlook.com ([fe80::853e:1256:311e:d29%7]) with mapi id 15.20.2474.015; Wed, 20 Nov 2019 06:59:28 +0000 From: Yash Shah To: "linus.walleij@linaro.org" , "bgolaszewski@baylibre.com" , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "palmer@dabbelt.com" , "Paul Walmsley ( Sifive)" Subject: [PATCH v2 2/5] irqchip: sifive: Support hierarchy irq domain Thread-Topic: [PATCH v2 2/5] irqchip: sifive: Support hierarchy irq domain Thread-Index: AQHVn3ANvAc498he10C+K+BReEuyxA== Date: Wed, 20 Nov 2019 06:59:28 +0000 Message-ID: <1574233128-28114-3-git-send-email-yash.shah@sifive.com> References: <1574233128-28114-1-git-send-email-yash.shah@sifive.com> In-Reply-To: <1574233128-28114-1-git-send-email-yash.shah@sifive.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: LO2P265CA0208.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:9e::28) To CH2PR13MB3368.namprd13.prod.outlook.com (2603:10b6:610:2c::26) authentication-results: spf=none (sender IP is ) smtp.mailfrom=yash.shah@sifive.com; 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This is needed as pre-requisite for gpio-sifive driver. Signed-off-by: Yash Shah --- drivers/irqchip/Kconfig | 1 + drivers/irqchip/irq-sifive-plic.c | 30 ++++++++++++++++++++++++++---- 2 files changed, 27 insertions(+), 4 deletions(-) diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index ccbb897..a398552 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -488,6 +488,7 @@ endmenu config SIFIVE_PLIC bool "SiFive Platform-Level Interrupt Controller" depends on RISCV + select IRQ_DOMAIN_HIERARCHY help This enables support for the PLIC chip found in SiFive (and potentially other) RISC-V systems. The PLIC controls devices diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c index 7d0a12f..750e366 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -154,15 +154,37 @@ static struct irq_chip plic_chip = { static int plic_irqdomain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) { - irq_set_chip_and_handler(irq, &plic_chip, handle_fasteoi_irq); - irq_set_chip_data(irq, NULL); + irq_domain_set_info(d, irq, hwirq, &plic_chip, d->host_data, + handle_fasteoi_irq, NULL, NULL); irq_set_noprobe(irq); return 0; } +static int plic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i, ret; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + struct irq_fwspec *fwspec = arg; + + ret = irq_domain_translate_onecell(domain, fwspec, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) { + ret = plic_irqdomain_map(domain, virq + i, hwirq + i); + if (ret) + return ret; + } + + return 0; +} + static const struct irq_domain_ops plic_irqdomain_ops = { - .map = plic_irqdomain_map, - .xlate = irq_domain_xlate_onecell, + .translate = irq_domain_translate_onecell, + .alloc = plic_irq_domain_alloc, + .free = irq_domain_free_irqs_top, }; static struct irq_domain *plic_irqdomain;