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irqchip/gic: Add helper function for chip initialisation 

For GICs that require runtime power-management it is necessary to
populate the 'parent_device' member of the irqchip structure. In
preparation for supporting such GICs, move the code that initialises
the irqchip structure for a GIC into its own function called
gic_init_chip() where the parent device pointer is also set.

Instead of calling gic_init_chip() from within gic_init_bases(), move
the calls to outside of this function, so that in the future we can
avoid having to pass additional parameters to gic_init_bases() in order
set the parent device pointer or set the name to a specific string.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Jon Hunter 2016-06-07 16:12:31 +01:00 committed by Marc Zyngier
parent d6ce564cea
commit faea645585
1 changed files with 27 additions and 14 deletions
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41
drivers/irqchip/irq-gic.c
View File

@ -1032,29 +1032,31 @@ static const struct irq_domain_ops gic_irq_domain_ops = {
.unmap = gic_irq_domain_unmap,
};
static int gic_init_bases(struct gic_chip_data *gic, int irq_start,
struct fwnode_handle *handle)
static void gic_init_chip(struct gic_chip_data *gic, struct device *dev,
const char *name, bool use_eoimode1)
{
irq_hw_number_t hwirq_base;
int gic_irqs, irq_base, ret;
/* Initialize irq_chip */
gic->chip = gic_chip;
gic->chip.name = name;
gic->chip.parent_device = dev;
if (static_key_true(&supports_deactivate) && gic == &gic_data[0]) {
if (use_eoimode1) {
gic->chip.irq_mask = gic_eoimode1_mask_irq;
gic->chip.irq_eoi = gic_eoimode1_eoi_irq;
gic->chip.irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity;
gic->chip.name = kasprintf(GFP_KERNEL, "GICv2");
} else {
gic->chip.name = kasprintf(GFP_KERNEL, "GIC-%d",
(int)(gic - &gic_data[0]));
}
#ifdef CONFIG_SMP
if (gic == &gic_data[0])
gic->chip.irq_set_affinity = gic_set_affinity;
#endif
}
static int gic_init_bases(struct gic_chip_data *gic, int irq_start,
struct fwnode_handle *handle)
{
irq_hw_number_t hwirq_base;
int gic_irqs, irq_base, ret;
if (IS_ENABLED(CONFIG_GIC_NON_BANKED) && gic->percpu_offset) {
/* Frankein-GIC without banked registers... */
@ -1152,8 +1154,6 @@ error:
free_percpu(gic->cpu_base.percpu_base);
}
kfree(gic->chip.name);
return ret;
}
@ -1161,7 +1161,8 @@ static int __init __gic_init_bases(struct gic_chip_data *gic,
int irq_start,
struct fwnode_handle *handle)
{
int i;
char *name;
int i, ret;
if (WARN_ON(!gic || gic->domain))
return -EINVAL;
@ -1183,7 +1184,19 @@ static int __init __gic_init_bases(struct gic_chip_data *gic,
pr_info("GIC: Using split EOI/Deactivate mode\n");
}
return gic_init_bases(gic, irq_start, handle);
if (static_key_true(&supports_deactivate) && gic == &gic_data[0]) {
name = kasprintf(GFP_KERNEL, "GICv2");
gic_init_chip(gic, NULL, name, true);
} else {
name = kasprintf(GFP_KERNEL, "GIC-%d", (int)(gic-&gic_data[0]));
gic_init_chip(gic, NULL, name, false);
}
ret = gic_init_bases(gic, irq_start, handle);
if (ret)
kfree(name);
return ret;
}
void __init gic_init(unsigned int gic_nr, int irq_start,