diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 15:12:21 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:15:57 +0530 |
| commit | abe11ddea1d759f9995a9a4636c28c9b40856ca8 (patch) | |
| tree | 53085d131ecbe7a810f9feadcba571f49a2e9465 /arch/arc/kernel/irq.c | |
| parent | 450dd430bf45ab212a91acfb9bed2528d17f30cd (diff) | |
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 <vgupta@synopsys.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arc/kernel/irq.c')
| -rw-r--r-- | arch/arc/kernel/irq.c | 38 |
1 files changed, 32 insertions, 6 deletions
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 <linux/interrupt.h> #include <linux/module.h> +#include <linux/of.h> +#include <linux/irqdomain.h> #include <asm/sections.h> #include <asm/irq.h> @@ -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); } /* |