diff options
Diffstat (limited to 'kernel/drivers/irqchip/irq-nvic.c')
| -rw-r--r-- | kernel/drivers/irqchip/irq-nvic.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/kernel/drivers/irqchip/irq-nvic.c b/kernel/drivers/irqchip/irq-nvic.c index 4ff0805fc..b1777104f 100644 --- a/kernel/drivers/irqchip/irq-nvic.c +++ b/kernel/drivers/irqchip/irq-nvic.c @@ -21,13 +21,12 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/irq.h> +#include <linux/irqchip.h> #include <linux/irqdomain.h> #include <asm/v7m.h> #include <asm/exception.h> -#include "irqchip.h" - #define NVIC_ISER 0x000 #define NVIC_ICER 0x080 #define NVIC_IPR 0x300 @@ -49,6 +48,41 @@ nvic_handle_irq(irq_hw_number_t hwirq, struct pt_regs *regs) handle_IRQ(irq, regs); } +static int nvic_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 nvic_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 = nvic_irq_domain_translate(domain, fwspec, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) + irq_map_generic_chip(domain, virq + i, hwirq + i); + + return 0; +} + +static const struct irq_domain_ops nvic_irq_domain_ops = { + .translate = nvic_irq_domain_translate, + .alloc = nvic_irq_domain_alloc, + .free = irq_domain_free_irqs_top, +}; + static int __init nvic_of_init(struct device_node *node, struct device_node *parent) { @@ -70,7 +104,8 @@ static int __init nvic_of_init(struct device_node *node, irqs = NVIC_MAX_IRQ; nvic_irq_domain = - irq_domain_add_linear(node, irqs, &irq_generic_chip_ops, NULL); + irq_domain_add_linear(node, irqs, &nvic_irq_domain_ops, NULL); + if (!nvic_irq_domain) { pr_warn("Failed to allocate irq domain\n"); return -ENOMEM; |