diff options
| author | Marc Zyngier <maz@kernel.org> | 2022-02-01 12:02:59 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-02-09 13:35:56 +0000 |
| commit | 1f8863bfb5ca500ea1c7669b16b1931ba27fce20 (patch) | |
| tree | 03a3610203ea60dc77c11d7053dac9ea62fbb23c /kernel | |
| parent | dfd42facf1e4ada021b939b4e19c935dcdd55566 (diff) | |
genirq: Allow the PM device to originate from irq domain
As a preparation to moving the reference to the device used for
runtime power management, add a new 'dev' field to the irqdomain
structure for that exact purpose.
The irq_chip_pm_{get,put}() helpers are made aware of the dual
location via a new private helper.
No functional change intended.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Link: https://lore.kernel.org/r/20220201120310.878267-2-maz@kernel.org
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/chip.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index c09324663088..a2a12cdbe872 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -1558,6 +1558,17 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) return 0; } +static struct device *irq_get_parent_device(struct irq_data *data) +{ + if (data->chip->parent_device) + return data->chip->parent_device; + + if (data->domain) + return data->domain->dev; + + return NULL; +} + /** * irq_chip_pm_get - Enable power for an IRQ chip * @data: Pointer to interrupt specific data @@ -1567,12 +1578,13 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) */ int irq_chip_pm_get(struct irq_data *data) { + struct device *dev = irq_get_parent_device(data); int retval; - if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) { - retval = pm_runtime_get_sync(data->chip->parent_device); + if (IS_ENABLED(CONFIG_PM) && dev) { + retval = pm_runtime_get_sync(dev); if (retval < 0) { - pm_runtime_put_noidle(data->chip->parent_device); + pm_runtime_put_noidle(dev); return retval; } } @@ -1590,10 +1602,11 @@ int irq_chip_pm_get(struct irq_data *data) */ int irq_chip_pm_put(struct irq_data *data) { + struct device *dev = irq_get_parent_device(data); int retval = 0; - if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) - retval = pm_runtime_put(data->chip->parent_device); + if (IS_ENABLED(CONFIG_PM) && dev) + retval = pm_runtime_put(dev); return (retval < 0) ? retval : 0; } |