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irqchip/gic: Prepare for adding platform driver 

To support GICs that require runtime power management, it is necessary
to add a platform driver, so that the probing of the chip can be
deferred if resources, such as a power-domain, is not yet available.

To prepare for adding a platform driver:
 1. Drop the __init section from the gic_dist_config() so this can be
    re-used by the platform driver.
 2. Add prototypes for functions required by the platform driver to the
    GIC header file so they can be re-used.

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 16:12:32 +01:00 committed by Marc Zyngier
parent faea645585
commit cdbb813db6
3 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/irqchip/irq-gic-common.c
View File

@ -90,8 +90,8 @@ int gic_configure_irq(unsigned int irq, unsigned int type,
return ret;
}
void __init gic_dist_config(void __iomem *base, int gic_irqs,
void (*sync_access)(void))
void gic_dist_config(void __iomem *base, int gic_irqs,
void (*sync_access)(void))
{
unsigned int i;

14
drivers/irqchip/irq-gic.c
View File

@ -449,7 +449,7 @@ static void gic_cpu_if_up(struct gic_chip_data *gic)
}
static void __init gic_dist_init(struct gic_chip_data *gic)
static void gic_dist_init(struct gic_chip_data *gic)
{
unsigned int i;
u32 cpumask;
@ -535,7 +535,7 @@ int gic_cpu_if_down(unsigned int gic_nr)
* this function, no interrupts will be delivered by the GIC, and another
* platform-specific wakeup source must be enabled.
*/
static void gic_dist_save(struct gic_chip_data *gic)
void gic_dist_save(struct gic_chip_data *gic)
{
unsigned int gic_irqs;
void __iomem *dist_base;
@ -574,7 +574,7 @@ static void gic_dist_save(struct gic_chip_data *gic)
* handled normally, but any edge interrupts that occured will not be seen by
* the GIC and need to be handled by the platform-specific wakeup source.
*/
static void gic_dist_restore(struct gic_chip_data *gic)
void gic_dist_restore(struct gic_chip_data *gic)
{
unsigned int gic_irqs;
unsigned int i;
@ -620,7 +620,7 @@ static void gic_dist_restore(struct gic_chip_data *gic)
writel_relaxed(GICD_ENABLE, dist_base + GIC_DIST_CTRL);
}
static void gic_cpu_save(struct gic_chip_data *gic)
void gic_cpu_save(struct gic_chip_data *gic)
{
int i;
u32 *ptr;
@ -650,7 +650,7 @@ static void gic_cpu_save(struct gic_chip_data *gic)
}
static void gic_cpu_restore(struct gic_chip_data *gic)
void gic_cpu_restore(struct gic_chip_data *gic)
{
int i;
u32 *ptr;
@ -727,7 +727,7 @@ static struct notifier_block gic_notifier_block = {
.notifier_call = gic_notifier,
};
static int __init gic_pm_init(struct gic_chip_data *gic)
static int gic_pm_init(struct gic_chip_data *gic)
{
gic->saved_ppi_enable = __alloc_percpu(DIV_ROUND_UP(32, 32) * 4,
sizeof(u32));
@ -757,7 +757,7 @@ static int __init gic_pm_init(struct gic_chip_data *gic)
return -ENOMEM;
}
#else
static int __init gic_pm_init(struct gic_chip_data *gic)
static int gic_pm_init(struct gic_chip_data *gic)
{
return 0;
}

5
include/linux/irqchip/arm-gic.h
View File

@ -101,9 +101,14 @@
#include <linux/irqdomain.h>
struct device_node;
struct gic_chip_data;
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
int gic_cpu_if_down(unsigned int gic_nr);
void gic_cpu_save(struct gic_chip_data *gic);
void gic_cpu_restore(struct gic_chip_data *gic);
void gic_dist_save(struct gic_chip_data *gic);
void gic_dist_restore(struct gic_chip_data *gic);
/*
* Subdrivers that need some preparatory work can initialize their