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DIR:OUT; SFP:1101; SCL:1; SRVR:CH2PR13MB3541; H:CH2PR13MB3368.namprd13.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: sifive.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: OV68bTN+aNXG4TB2H+413IX+IHaZbqWssg3uZVrMz48gC4nh0XZLmVimHRn47XdCq50WlE6r/4PSpq3oxi3X2FWI7sbl2AgfMOZ6I+53vmTHLqEqESuip6GucgM08ICbJ9lnlufDe5NHxkUrnNj14VAlukRKDU7armEBr7lTWI2TO2MRyWL6kjYzM2Bx3snEZA/SVZrDwaLioHialiczZc4dYjLwCuVoJKap/mhzvQsfNUo3eTSxCXRFJECfC5yhm5igKl3kI6F0VHtgKpsLyI+EsA3FMwgI+nUdoMQ09fRWfNicJBVAdMh388mjWn1lhZdpuqhl4TGu7FMznp64C0TcnXseMWVxqKpG9J6VdF5Xv2vntWc3QQC5jxwqclfo4zvItnal9ibiPWu4jwjUctGre4y1V1ysB05TjCxNqHDpBLbDwtY3Ru+qwwLcsCpy MIME-Version: 1.0 X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: abb036b8-2aa6-468d-8143-08d7676984af X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Nov 2019 12:11:59.4214 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: sFiaiDMnkcAOwYTl8MI14jy7fZropQhi5xDgIEtOAm4hyQEsxN4b3Q5OVqjLmBikCckPoTg4njbT451WilGTUA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR13MB3541 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add support for hierarchy irq domains. 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 | 41 +++++++++++++++++++++++++++++++++++---- 2 files changed, 38 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..2fa1c84 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -154,15 +154,48 @@ 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_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, unsigned int *type) +{ + if (WARN_ON(fwspec->param_count < 1)) + return -EINVAL; + *hwirq = fwspec->param[0]; + *type = IRQ_TYPE_NONE; + 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 = plic_irq_domain_translate(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 = plic_irq_domain_translate, + .alloc = plic_irq_domain_alloc, + .free = irq_domain_free_irqs_top, }; static struct irq_domain *plic_irqdomain;