diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/platform.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 8ad701068c11..0dda6ade50fd 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -193,6 +193,28 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) EXPORT_SYMBOL_GPL(platform_get_irq); /** + * platform_get_irq_optional - get an optional IRQ for a device + * @dev: platform device + * @num: IRQ number index + * + * Gets an IRQ for a platform device. Device drivers should check the return + * value for errors so as to not pass a negative integer value to the + * request_irq() APIs. This is the same as platform_get_irq(), except that it + * does not print an error message if an IRQ can not be obtained. + * + * Example: + * int irq = platform_get_irq_optional(pdev, 0); + * if (irq < 0) + * return irq; + * + * Return: IRQ number on success, negative error number on failure. + */ +int platform_get_irq_optional(struct platform_device *dev, unsigned int num) +{ + return __platform_get_irq(dev, num); +} + +/** * platform_irq_count - Count the number of IRQs a platform device uses * @dev: platform device * |