dt/irq: add irq_domain_generate_simple() helper
irq_domain_generate_simple() is an easy way to generate an irq translation domain for simple irq controllers. It assumes a flat 1:1 mapping from hardware irq number to an offset of the first linux irq number assigned to the controller Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Родитель
08a543ad33
Коммит
7e71330169
|
@ -16,6 +16,7 @@
|
|||
#define _LINUX_IRQDOMAIN_H
|
||||
|
||||
#include <linux/irq.h>
|
||||
#include <linux/mod_devicetable.h>
|
||||
|
||||
#ifdef CONFIG_IRQ_DOMAIN
|
||||
struct device_node;
|
||||
|
@ -78,4 +79,13 @@ extern void irq_domain_add(struct irq_domain *domain);
|
|||
extern void irq_domain_del(struct irq_domain *domain);
|
||||
#endif /* CONFIG_IRQ_DOMAIN */
|
||||
|
||||
#if defined(CONFIG_IRQ_DOMAIN) && defined(CONFIG_OF_IRQ)
|
||||
extern void irq_domain_add_simple(struct device_node *controller, int irq_base);
|
||||
extern void irq_domain_generate_simple(const struct of_device_id *match,
|
||||
u64 phys_base, unsigned int irq_start);
|
||||
#else /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
|
||||
static inline void irq_domain_generate_simple(const struct of_device_id *match,
|
||||
u64 phys_base, unsigned int irq_start) { }
|
||||
#endif /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
|
||||
|
||||
#endif /* _LINUX_IRQDOMAIN_H */
|
||||
|
|
|
@ -3,6 +3,8 @@
|
|||
#include <linux/module.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
static LIST_HEAD(irq_domain_list);
|
||||
static DEFINE_MUTEX(irq_domain_mutex);
|
||||
|
@ -119,4 +121,60 @@ void irq_dispose_mapping(unsigned int irq)
|
|||
*/
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(irq_dispose_mapping);
|
||||
|
||||
int irq_domain_simple_dt_translate(struct irq_domain *d,
|
||||
struct device_node *controller,
|
||||
const u32 *intspec, unsigned int intsize,
|
||||
unsigned long *out_hwirq, unsigned int *out_type)
|
||||
{
|
||||
if (d->of_node != controller)
|
||||
return -EINVAL;
|
||||
if (intsize < 1)
|
||||
return -EINVAL;
|
||||
|
||||
*out_hwirq = intspec[0];
|
||||
*out_type = IRQ_TYPE_NONE;
|
||||
if (intsize > 1)
|
||||
*out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct irq_domain_ops irq_domain_simple_ops = {
|
||||
.dt_translate = irq_domain_simple_dt_translate,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
|
||||
|
||||
/**
|
||||
* irq_domain_create_simple() - Set up a 'simple' translation range
|
||||
*/
|
||||
void irq_domain_add_simple(struct device_node *controller, int irq_base)
|
||||
{
|
||||
struct irq_domain *domain;
|
||||
|
||||
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
|
||||
if (!domain) {
|
||||
WARN_ON(1);
|
||||
return;
|
||||
}
|
||||
|
||||
domain->irq_base = irq_base;
|
||||
domain->of_node = of_node_get(controller);
|
||||
domain->ops = &irq_domain_simple_ops;
|
||||
irq_domain_add(domain);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(irq_domain_add_simple);
|
||||
|
||||
void irq_domain_generate_simple(const struct of_device_id *match,
|
||||
u64 phys_base, unsigned int irq_start)
|
||||
{
|
||||
struct device_node *node;
|
||||
pr_info("looking for phys_base=%llx, irq_start=%i\n",
|
||||
(unsigned long long) phys_base, (int) irq_start);
|
||||
node = of_find_matching_node_by_address(NULL, match, phys_base);
|
||||
if (node)
|
||||
irq_domain_add_simple(node, irq_start);
|
||||
else
|
||||
pr_info("no node found\n");
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(irq_domain_generate_simple);
|
||||
#endif /* CONFIG_OF_IRQ */
|
||||
|
|
Загрузка…
Ссылка в новой задаче