diff options
Diffstat (limited to 'backport-include/linux/acpi.h')
| -rw-r--r-- | backport-include/linux/acpi.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/backport-include/linux/acpi.h b/backport-include/linux/acpi.h new file mode 100644 index 0000000..2f1072f --- /dev/null +++ b/backport-include/linux/acpi.h @@ -0,0 +1,72 @@ +#ifndef __BACKPORT_LINUX_ACPI_H +#define __BACKPORT_LINUX_ACPI_H +#include_next <linux/acpi.h> +#include <linux/version.h> + +#if LINUX_VERSION_IS_LESS(3,8,0) +/* + * Backports + * + * commit 95f8a082b9b1ead0c2859f2a7b1ac91ff63d8765 + * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> + * Date: Wed Nov 21 00:21:50 2012 +0100 + * + * ACPI / driver core: Introduce struct acpi_dev_node and related macros + * + * To avoid adding an ACPI handle pointer to struct device on + * architectures that don't use ACPI, or generally when CONFIG_ACPI is + * not set, in which cases that pointer is useless, define struct + * acpi_dev_node that will contain the handle pointer if CONFIG_ACPI is + * set and will be empty otherwise and use it to represent the ACPI + * device node field in struct device. + * + * In addition to that define macros for reading and setting the ACPI + * handle of a device that don't generate code when CONFIG_ACPI is + * unset. Modify the ACPI subsystem to use those macros instead of + * referring to the given device's ACPI handle directly. + * + * Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> + * Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> + * Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> + */ +#ifdef CONFIG_ACPI +#define ACPI_HANDLE(dev) DEVICE_ACPI_HANDLE(dev) +#else +#define ACPI_HANDLE(dev) (NULL) +#endif /* CONFIG_ACPI */ +#endif /* LINUX_VERSION_IS_LESS(3,8,0) */ + +#ifndef ACPI_COMPANION +#ifdef CONFIG_ACPI +static inline struct acpi_device *_acpi_get_companion(struct device *dev) +{ + struct acpi_device *adev; + int ret; + + ret = acpi_bus_get_device(ACPI_HANDLE(dev), &adev); + if (ret < 0) + adev = NULL; + + return adev; +} +#define ACPI_COMPANION(dev) _acpi_get_companion(dev) +#else +#define ACPI_COMPANION(dev) (NULL) +#endif /* CONFIG_ACPI */ +#endif /* ACPI_COMPANION */ + +#if LINUX_VERSION_IS_LESS(3,19,0) +#define acpi_dev_remove_driver_gpios LINUX_BACKPORT(acpi_dev_remove_driver_gpios) +static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {} +#endif /* LINUX_VERSION_IS_LESS(3, 19, 0) */ + +#if LINUX_VERSION_IN_RANGE(3,19,0, 4,13,0) +#define devm_acpi_dev_add_driver_gpios LINUX_BACKPORT(devm_acpi_dev_add_driver_gpios) +static inline int devm_acpi_dev_add_driver_gpios(struct device *dev, + const struct acpi_gpio_mapping *gpios) +{ + return -ENXIO; +} +#endif /* LINUX_VERSION_IN_RANGE(3,19,0, 4,13,0) */ + +#endif /* __BACKPORT_LINUX_ACPI_H */ |