[RFCv2 PATCH 4/8] acpi: gsi: Adding acpi_init_irq_alloc_info() hook

From: Suravee Suthikulpanit
Date: Mon Jul 13 2015 - 05:15:31 EST


This patch adds acpi_init_irq_alloc_info(), which is declared as
a weak symbol. This would allow arch-specific code to hook into
acpi_register_gsi().

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
---
drivers/acpi/gsi.c | 36 +++++++++++++++++++++++++++++++-----
1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/gsi.c b/drivers/acpi/gsi.c
index 02c8408..01a14c5 100644
--- a/drivers/acpi/gsi.c
+++ b/drivers/acpi/gsi.c
@@ -62,6 +62,13 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
}
EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);

+int __weak
+acpi_init_irq_alloc_info(struct irq_domain *domain, u32 gsi,
+ unsigned int irq_type, void **info)
+{
+ return 0;
+}
+
/**
* acpi_register_gsi() - Map a GSI to a linux IRQ number
* @dev: device for which IRQ has to be mapped
@@ -75,22 +82,41 @@ EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
int acpi_register_gsi(struct device *dev, u32 gsi, int trigger,
int polarity)
{
- int irq;
+ unsigned int irq;
unsigned int irq_type = acpi_gsi_get_irq_type(trigger, polarity);
+ struct irq_data *d = NULL;
+ void *info = NULL;
+ int err;

irq = irq_find_mapping(acpi_irq_domain, gsi);
if (irq > 0)
return irq;

- irq = irq_domain_alloc_irqs(acpi_irq_domain, 1, dev_to_node(dev),
- &gsi);
+ err = acpi_init_irq_alloc_info(acpi_irq_domain, gsi, irq_type, &info);
+ if (err)
+ return err;
+
+ if (!info)
+ /* Default to pass gsi directly to allocate irq */
+ info = &gsi;
+
+ irq = irq_domain_alloc_irqs(acpi_irq_domain, 1, dev_to_node(dev), info);
if (irq <= 0)
return -EINVAL;

+ d = irq_domain_get_irq_data(acpi_irq_domain, irq);
+ if (!d)
+ return -EFAULT;
+
/* Set irq type if specified and different than the current one */
if (irq_type != IRQ_TYPE_NONE &&
- irq_type != irq_get_trigger_type(irq))
- irq_set_irq_type(irq, irq_type);
+ irq_type != irq_get_trigger_type(irq)) {
+ if (d)
+ d->chip->irq_set_type(d, irq_type);
+ else
+ irq_set_irq_type(irq, irq_type);
+ }
+
return irq;
}
EXPORT_SYMBOL_GPL(acpi_register_gsi);
--
2.1.0

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