diff options
| author | Daniel Scally <djrscally@gmail.com> | 2021-06-03 23:40:05 +0100 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-06-04 16:24:19 +0300 |
| commit | 043d7f09bf614809c10c4acbf0695ef731958300 (patch) | |
| tree | 8a62dceefab5f54426f90f838c7eb91a04294322 | |
| parent | 43582f29b161d820717bc13f562bca27af12e3cf (diff) | |
gpiolib: acpi: Add acpi_gpio_get_io_resource()
Add a function to verify that a given ACPI resource represents a GpioIo()
type of resource, and return it if so.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 23 | ||||
| -rw-r--r-- | include/linux/acpi.h | 7 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 75cd0c5a5cc4..cf99a5752fe0 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -196,6 +196,29 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, } EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); +/** + * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO + * I/O resource or return False if not. + * @ares: Pointer to the ACPI resource to fetch + * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer + */ +bool acpi_gpio_get_io_resource(struct acpi_resource *ares, + struct acpi_resource_gpio **agpio) +{ + struct acpi_resource_gpio *gpio; + + if (ares->type != ACPI_RESOURCE_TYPE_GPIO) + return false; + + gpio = &ares->data.gpio; + if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO) + return false; + + *agpio = gpio; + return true; +} +EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource); + static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio, struct acpi_gpio_event *event) { diff --git a/include/linux/acpi.h b/include/linux/acpi.h index c60745f657e9..a74d37a3b618 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1096,6 +1096,8 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c #if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB) bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, struct acpi_resource_gpio **agpio); +bool acpi_gpio_get_io_resource(struct acpi_resource *ares, + struct acpi_resource_gpio **agpio); int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index); #else static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, @@ -1103,6 +1105,11 @@ static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, { return false; } +static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares, + struct acpi_resource_gpio **agpio) +{ + return false; +} static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index) { |