ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags

ACPI IRQ/Interrupt resources contain a bit that describes if the
interrupt should wake the system. This change exposes that bit via
a new IORESOURCE_IRQ_WAKECAPABLE flag. Drivers should check this flag
before arming an IRQ to wake the system.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 16 insertions, 8 deletions

diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index dabe45eba055..4bb5ab33a5ce 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -147,6 +147,7 @@ struct acpi_irq_parse_one_ctx {
  * @polarity: polarity attributes of hwirq
  * @polarity: polarity attributes of hwirq
  * @shareable: shareable attributes of hwirq
+ * @wake_capable: wake capable attribute of hwirq
  * @ctx: acpi_irq_parse_one_ctx updated by this function
  *
  * Description:
@@ -156,12 +157,13 @@ struct acpi_irq_parse_one_ctx {
 static inline void acpi_irq_parse_one_match(struct fwnode_handle *fwnode,
 					    u32 hwirq, u8 triggering,
 					    u8 polarity, u8 shareable,
+					    u8 wake_capable,
 					    struct acpi_irq_parse_one_ctx *ctx)
 {
 	if (!fwnode)
 		return;
 	ctx->rc = 0;
-	*ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable);
+	*ctx->res_flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
 	ctx->fwspec->fwnode = fwnode;
 	ctx->fwspec->param[0] = hwirq;
 	ctx->fwspec->param[1] = acpi_dev_get_irq_type(triggering, polarity);
@@ -204,7 +206,7 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 		fwnode = acpi_get_gsi_domain_id(irq->interrupts[ctx->index]);
 		acpi_irq_parse_one_match(fwnode, irq->interrupts[ctx->index],
 					 irq->triggering, irq->polarity,
-					 irq->shareable, ctx);
+					 irq->shareable, irq->wake_capable, ctx);
 		return AE_CTRL_TERMINATE;
 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 		eirq = &ares->data.extended_irq;
@@ -218,7 +220,7 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 						      eirq->interrupts[ctx->index]);
 		acpi_irq_parse_one_match(fwnode, eirq->interrupts[ctx->index],
 					 eirq->triggering, eirq->polarity,
-					 eirq->shareable, ctx);
+					 eirq->shareable, eirq->wake_capable, ctx);
 		return AE_CTRL_TERMINATE;
 	}
 
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 510cdec375c4..81733369f4c1 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -336,8 +336,9 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
  * @triggering: Triggering type as provided by ACPI.
  * @polarity: Interrupt polarity as provided by ACPI.
  * @shareable: Whether or not the interrupt is shareable.
+ * @wake_capable: Wake capability as provided by ACPI.
  */
-unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
+unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable)
 {
 	unsigned long flags;
 
@@ -351,6 +352,9 @@ unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
 	if (shareable == ACPI_SHARED)
 		flags |= IORESOURCE_IRQ_SHAREABLE;
 
+	if (wake_capable == ACPI_WAKE_CAPABLE)
+		flags |= IORESOURCE_IRQ_WAKECAPABLE;
+
 	return flags | IORESOURCE_IRQ;
 }
 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
@@ -442,7 +446,7 @@ static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
 
 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 				     u8 triggering, u8 polarity, u8 shareable,
-				     bool check_override)
+				     u8 wake_capable, bool check_override)
 {
 	int irq, p, t;
 
@@ -475,7 +479,7 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 		}
 	}
 
-	res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
+	res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable);
 	irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
 	if (irq >= 0) {
 		res->start = irq;
@@ -523,7 +527,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 		}
 		acpi_dev_get_irqresource(res, irq->interrupts[index],
 					 irq->triggering, irq->polarity,
-					 irq->shareable, true);
+					 irq->shareable, irq->wake_capable,
+					 true);
 		break;
 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 		ext_irq = &ares->data.extended_irq;
@@ -534,7 +539,8 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 		if (is_gsi(ext_irq))
 			acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
 					 ext_irq->triggering, ext_irq->polarity,
-					 ext_irq->shareable, false);
+					 ext_irq->shareable, ext_irq->wake_capable,
+					 false);
 		else
 			irqresource_disabled(res, 0);
 		break;