gpiolib: acpi: Allow ignoring wake capability on pins that aren't in _AEI

[platform/kernel/linux-starfive.git] / drivers / gpio / gpiolib-acpi.c

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 285ecbf..27f2346 100644 (file)
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -361,7 +361,7 @@ err:
 }
 
 static bool acpi_gpio_irq_is_wake(struct device *parent,
-                                 struct acpi_resource_gpio *agpio)
+                                 const struct acpi_resource_gpio *agpio)
 {
        unsigned int pin = agpio->pin_table[0];
 
@@ -754,6 +754,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
                lookup->info.pin_config = agpio->pin_config;
                lookup->info.debounce = agpio->debounce_timeout;
                lookup->info.gpioint = gpioint;
+               lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio);
 
                /*
                 * Polarity and triggering are only specified for GpioInt
@@ -1000,10 +1001,11 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
 }
 
 /**
- * acpi_dev_gpio_irq_get_by() - Find GpioInt and translate it to Linux IRQ number
+ * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number
  * @adev: pointer to a ACPI device to get IRQ from
  * @name: optional name of GpioInt resource
  * @index: index of GpioInt resource (starting from %0)
+ * @wake_capable: Set to true if the IRQ is wake capable
  *
  * If the device has one or more GpioInt resources, this function can be
  * used to translate from the GPIO offset in the resource to the Linux IRQ
@@ -1015,9 +1017,13 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
  * The function takes optional @name parameter. If the resource has a property
  * name, then only those will be taken into account.
  *
+ * The GPIO is considered wake capable if the GpioInt resource specifies
+ * SharedAndWake or ExclusiveAndWake.
+ *
  * Return: Linux IRQ number (> %0) on success, negative errno on failure.
  */
-int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index)
+int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index,
+                                 bool *wake_capable)
 {
        int idx, i;
        unsigned int irq_flags;
@@ -1074,13 +1080,16 @@ int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int ind
                                dev_dbg(&adev->dev, "IRQ %d already in use\n", irq);
                        }
 
+                       if (wake_capable)
+                               *wake_capable = info.wake_capable;
+
                        return irq;
                }
 
        }
        return -ENOENT;
 }
-EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get_by);
+EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by);
 
 static acpi_status
 acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,