struct irq_domain * __init flipper_pic_init(struct device_node *np)
{
struct device_node *pi;
struct irq_domain *irq_domain = NULL;
struct resource res;
void __iomem *io_base;
int retval;
pi = of_get_parent(np);
if (!pi) {
pr_err("no parent found\n");
goto out;
}
if (!of_device_is_compatible(pi, "nintendo,flipper-pi")) {
pr_err("unexpected parent compatible\n");
goto out;
}
retval = of_address_to_resource(pi, 0, &res);
if (retval) {
pr_err("no io memory range found\n");
goto out;
}
io_base = ioremap(res.start, resource_size(&res));
pr_info("controller at 0x%08x mapped to 0x%p\n", res.start, io_base);
__flipper_quiesce(io_base);
irq_domain = irq_domain_add_linear(np, FLIPPER_NR_IRQS,
&flipper_irq_domain_ops, io_base);
if (!irq_domain) {
pr_err("failed to allocate irq_domain\n");
return NULL;
}
out:
return irq_domain;
}
void flipper_quiesce(void)
{
void __iomem *io_base = flipper_irq_host->host_data;
__flipper_quiesce(io_base);
}
