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gpiolib: acpi: Allow to find GpioInt() resource by name and index

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commit 809390219f upstream.

Currently only search by index is supported. However, in some cases
we might need to pass the quirks to the acpi_dev_gpio_irq_get().

For this, split out acpi_dev_gpio_irq_get_by() and replace
acpi_dev_gpio_irq_get() by calling above with NULL for name parameter.

Fixes: ba8c90c618 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
Depends-on: 0ea683931a ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-02-25 18:33:19 +02:00 committed by Greg Kroah-Hartman
parent 8df70a5b4d
commit f60ffab258
2 changed files with 16 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/gpio/gpiolib-acpi.c
View file

@ -916,8 +916,9 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
}
/**
* acpi_dev_gpio_irq_get() - Find GpioInt and translate it to Linux IRQ number
* acpi_dev_gpio_irq_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)
*
* If the device has one or more GpioInt resources, this function can be
@ -927,9 +928,12 @@ struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
* The function is idempotent, though each time it runs it will configure GPIO
* pin direction according to the flags in GpioInt resource.
*
* The function takes optional @name parameter. If the resource has a property
* name, then only those will be taken into account.
*
* Return: Linux IRQ number (> %0) on success, negative errno on failure.
*/
int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index)
{
int idx, i;
unsigned int irq_flags;
@ -939,7 +943,7 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
struct acpi_gpio_info info;
struct gpio_desc *desc;
desc = acpi_get_gpiod_by_index(adev, NULL, i, &info);
desc = acpi_get_gpiod_by_index(adev, name, i, &info);
/* Ignore -EPROBE_DEFER, it only matters if idx matches */
if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
@ -976,7 +980,7 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
}
return -ENOENT;
}
EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get);
EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get_by);
static acpi_status
acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,

10
include/linux/acpi.h
View file

@ -1072,19 +1072,25 @@ 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);
int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index);
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,
struct acpi_resource_gpio **agpio)
{
return false;
}
static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev,
const char *name, int index)
{
return -ENXIO;
}
#endif
static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
{
return acpi_dev_gpio_irq_get_by(adev, NULL, index);
}
/* Device properties */
#ifdef CONFIG_ACPI