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-rw-r--r--drivers/i2c/i2c-core-acpi.c40
-rw-r--r--drivers/i2c/i2c-core-base.c6
-rw-r--r--drivers/i2c/i2c-core.h4
3 files changed, 37 insertions, 13 deletions
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 08b561f0709d..f88386d732d2 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -137,6 +137,11 @@ static const struct acpi_device_id i2c_acpi_ignored_device_ids[] = {
{}
};
+struct i2c_acpi_irq_context {
+ int irq;
+ bool wake_capable;
+};
+
static int i2c_acpi_do_lookup(struct acpi_device *adev,
struct i2c_acpi_lookup *lookup)
{
@@ -168,13 +173,19 @@ static int i2c_acpi_do_lookup(struct acpi_device *adev,
return 0;
}
-static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data)
+static int i2c_acpi_add_irq_resource(struct acpi_resource *ares, void *data)
{
- int *irq = data;
+ struct i2c_acpi_irq_context *irq_ctx = data;
struct resource r;
- if (*irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r))
- *irq = i2c_dev_irq_from_resources(&r, 1);
+ if (irq_ctx->irq > 0)
+ return 1;
+
+ if (!acpi_dev_resource_interrupt(ares, 0, &r))
+ return 1;
+
+ irq_ctx->irq = i2c_dev_irq_from_resources(&r, 1);
+ irq_ctx->wake_capable = r.flags & IORESOURCE_IRQ_WAKECAPABLE;
return 1; /* No need to add resource to the list */
}
@@ -182,31 +193,40 @@ static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data)
/**
* i2c_acpi_get_irq - get device IRQ number from ACPI
* @client: Pointer to the I2C client device
+ * @wake_capable: Set to true if the IRQ is wake capable
*
* Find the IRQ number used by a specific client device.
*
* Return: The IRQ number or an error code.
*/
-int i2c_acpi_get_irq(struct i2c_client *client)
+int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable)
{
struct acpi_device *adev = ACPI_COMPANION(&client->dev);
struct list_head resource_list;
- int irq = -ENOENT;
+ struct i2c_acpi_irq_context irq_ctx = {
+ .irq = -ENOENT,
+ };
int ret;
INIT_LIST_HEAD(&resource_list);
ret = acpi_dev_get_resources(adev, &resource_list,
- i2c_acpi_add_resource, &irq);
+ i2c_acpi_add_irq_resource, &irq_ctx);
if (ret < 0)
return ret;
acpi_dev_free_resource_list(&resource_list);
- if (irq == -ENOENT)
- irq = acpi_dev_gpio_irq_get(adev, 0);
+ if (irq_ctx.irq == -ENOENT)
+ irq_ctx.irq = acpi_dev_gpio_irq_wake_get(adev, 0, &irq_ctx.wake_capable);
+
+ if (irq_ctx.irq < 0)
+ return irq_ctx.irq;
+
+ if (wake_capable)
+ *wake_capable = irq_ctx.wake_capable;
- return irq;
+ return irq_ctx.irq;
}
static int i2c_acpi_get_info(struct acpi_device *adev,
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 91007558bcb2..fc4b85fb90b1 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -487,7 +487,11 @@ static int i2c_device_probe(struct device *dev)
if (irq == -EINVAL || irq == -ENODATA)
irq = of_irq_get(dev->of_node, 0);
} else if (ACPI_COMPANION(dev)) {
- irq = i2c_acpi_get_irq(client);
+ bool wake_capable;
+
+ irq = i2c_acpi_get_irq(client, &wake_capable);
+ if (irq > 0 && wake_capable)
+ client->flags |= I2C_CLIENT_WAKE;
}
if (irq == -EPROBE_DEFER) {
status = irq;
diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h
index 87e2c914f1c5..1247e6e6e975 100644
--- a/drivers/i2c/i2c-core.h
+++ b/drivers/i2c/i2c-core.h
@@ -61,11 +61,11 @@ static inline int __i2c_check_suspended(struct i2c_adapter *adap)
#ifdef CONFIG_ACPI
void i2c_acpi_register_devices(struct i2c_adapter *adap);
-int i2c_acpi_get_irq(struct i2c_client *client);
+int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable);
#else /* CONFIG_ACPI */
static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
-static inline int i2c_acpi_get_irq(struct i2c_client *client)
+static inline int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable)
{
return 0;
}