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| author | Jon Hunter <jonathanh@nvidia.com> | 2016-06-07 16:12:29 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-06-13 11:53:51 +0100 |
| commit | be45beb2df6909d42a6b3b0052601b3eef878fc0 (patch) | |
| tree | ec2e157704e95b7d78cffc5be6026b6f7f022a7d /include | |
| parent | 1e2a7d78499ec8859d2b469051b7b80bad3b08aa (diff) | |
| download | linux-be45beb2df6909d42a6b3b0052601b3eef878fc0.tar.gz linux-be45beb2df6909d42a6b3b0052601b3eef878fc0.tar.bz2 linux-be45beb2df6909d42a6b3b0052601b3eef878fc0.zip | |
genirq: Add runtime power management support for IRQ chips
Some IRQ chips may be located in a power domain outside of the CPU
subsystem and hence will require device specific runtime power
management. In order to support such IRQ chips, add a pointer for a
device structure to the irq_chip structure, and if this pointer is
populated by the IRQ chip driver and CONFIG_PM is selected in the kernel
configuration, then the pm_runtime_get/put APIs for this chip will be
called when an IRQ is requested/freed, respectively.
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irq.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index 4d758a7c604a..6c92a847394d 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -315,6 +315,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) /** * struct irq_chip - hardware interrupt chip descriptor * + * @parent_device: pointer to parent device for irqchip * @name: name for /proc/interrupts * @irq_startup: start up the interrupt (defaults to ->enable if NULL) * @irq_shutdown: shut down the interrupt (defaults to ->disable if NULL) @@ -354,6 +355,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) * @flags: chip specific flags */ struct irq_chip { + struct device *parent_device; const char *name; unsigned int (*irq_startup)(struct irq_data *data); void (*irq_shutdown)(struct irq_data *data); @@ -488,6 +490,8 @@ extern void handle_bad_irq(struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg); +extern int irq_chip_pm_get(struct irq_data *data); +extern int irq_chip_pm_put(struct irq_data *data); #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY extern void irq_chip_enable_parent(struct irq_data *data); extern void irq_chip_disable_parent(struct irq_data *data); |