From abe11ddea1d759f9995a9a4636c28c9b40856ca8 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Fri, 18 Jan 2013 15:12:21 +0530 Subject: ARC: [plat-arcfpga]: Enabling DeviceTree for Angel4 board * arc-uart platform device now populated dynamically, using of_platform_populate() - applies to any other device whatsoever. * uart in turn requires incore arc-intc to be also present in DT * A irq-domain needs to be instantiated for IRQ requests by DT probed device (e.g. arc-uart) TODO: switch over to linear irq domain once all devs have been transitioned to DT Signed-off-by: Vineet Gupta Cc: Grant Likely Cc: Arnd Bergmann --- arch/arc/kernel/irq.c | 38 ++++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-) (limited to 'arch/arc/kernel/irq.c') diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c index 2f399eb88f9d..3c18e66386c7 100644 --- a/arch/arc/kernel/irq.c +++ b/arch/arc/kernel/irq.c @@ -9,6 +9,8 @@ #include #include +#include +#include #include #include @@ -59,16 +61,40 @@ static struct irq_chip onchip_intc = { .irq_unmask = arc_unmask_irq, }; +static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + if (irq == TIMER0_IRQ) + irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq); + else + irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq); + + return 0; +} + +static const struct irq_domain_ops arc_intc_domain_ops = { + .xlate = irq_domain_xlate_onecell, + .map = arc_intc_domain_map, +}; + +static struct irq_domain *root_domain; + void __init init_onchip_IRQ(void) { - int i; + struct device_node *intc = NULL; + + intc = of_find_compatible_node(NULL, NULL, "snps,arc700-intc"); + if(!intc) + panic("DeviceTree Missing incore intc\n"); + + root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0, + &arc_intc_domain_ops, NULL); - for (i = 0; i < NR_IRQS; i++) - irq_set_chip_and_handler(i, &onchip_intc, handle_level_irq); + if (!root_domain) + panic("root irq domain not avail\n"); -#ifdef CONFIG_SMP - irq_set_chip_and_handler(TIMER0_IRQ, &onchip_intc, handle_percpu_irq); -#endif + /* with this we don't need to export root_domain */ + irq_set_default_host(root_domain); } /* -- cgit v1.2.3