Messages in this thread Patch in this message | | | From | Thomas Gleixner <> | Subject | [patch V2 32/40] genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV | Date | Mon, 21 Nov 2022 15:40:08 +0100 (CET) |
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Some platform-MSI implementations require that power management is redirected to the underlying interrupt chip device. To make this work with per device MSI domains provide a new feature flag and let the core code handle the setup of dev->pm_dev when set during device MSI domain creation.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- include/linux/msi.h | 2 ++ kernel/irq/msi.c | 2 ++ 2 files changed, 4 insertions(+)
--- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -538,6 +538,8 @@ enum { MSI_FLAG_NOMASK_QUIRK = (1 << 7), /* Use dev->fwnode for MSI device domain creation */ MSI_FLAG_USE_DEV_FWNODE = (1 << 8), + /* Set parent->dev into domain->pm_dev on device domain creation */ + MSI_FLAG_PARENT_PM_DEV = (1 << 9), /* Mask for the generic functionality */ MSI_GENERIC_FLAGS_MASK = GENMASK(15, 0), --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -884,6 +884,8 @@ static struct irq_domain *__msi_create_i if (!domain->name && info->chip) domain->name = info->chip->name; irq_domain_update_bus_token(domain, info->bus_token); + if (info->flags & MSI_FLAG_PARENT_PM_DEV) + domain->pm_dev = parent->pm_dev; } return domain;
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