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| author | Yash Shah <yash.shah@sifive.com> | 2019-12-10 16:41:11 +0530 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-01-20 09:24:56 +0000 |
| commit | 466008f984358231f4608a0a4171b0e6e8251de8 (patch) | |
| tree | 75bea705434000efbd09199c15fe22b651b9f735 /drivers/irqchip | |
| parent | 459c3bc8c497d6b665c2efd15ee7df0f4e19452a (diff) | |
| download | linux-466008f984358231f4608a0a4171b0e6e8251de8.tar.gz | |
irqchip/sifive-plic: Support irq domain hierarchy
Add support for hierarchical irq domains. This is needed as pre-requisite for gpio-sifive driver. Signed-off-by: Yash Shah <yash.shah@sifive.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/1575976274-13487-4-git-send-email-yash.shah@sifive.com
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/Kconfig | 1 | ||||
| -rw-r--r-- | 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 697e6a8ccaae..bb89dfc82c6e 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -490,6 +490,7 @@ config TI_SCI_INTA_IRQCHIP 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 8df547d2d935..0332f6092ed8 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; + 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; |