diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2022-09-29 10:19:09 -0600 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-10-04 15:41:12 +0200 |
| commit | 4c99256013fa4e0fe9733ca1bab2b5684ccc02a1 (patch) | |
| tree | d9451a32e7892ce880517830ee4a9a37d623ae4c /drivers/gpio/gpiolib-acpi.c | |
| parent | f76349cf41451c5c42a99f18a9163377e4b364ff (diff) | |
gpiolib: acpi: Add wake_capable variants of acpi_dev_gpio_irq_get
The ACPI spec defines the SharedAndWake and ExclusiveAndWake share type
keywords. This is an indication that the GPIO IRQ can also be used as a
wake source. This change exposes the wake_capable bit so drivers can
correctly enable wake functionality instead of making an assumption.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/gpio/gpiolib-acpi.c')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 9be1376f9a62..1f2ade475b36 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -741,6 +741,7 @@ 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 = agpio->wake_capable == ACPI_WAKE_CAPABLE; /* * Polarity and triggering are only specified for GpioInt @@ -987,10 +988,11 @@ 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 @@ -1002,9 +1004,13 @@ 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; @@ -1061,13 +1067,16 @@ 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, |