diff options
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index dfdd004fb1a9..e8cdbdb46fdb 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -6,6 +6,7 @@ #define pr_fmt(fmt) "ACPI: " fmt #include <linux/async.h> +#include <linux/auxiliary_bus.h> #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> @@ -2192,6 +2193,44 @@ static acpi_status acpi_bus_check_add_2(acpi_handle handle, u32 lvl_not_used, return acpi_bus_check_add(handle, false, (struct acpi_device **)ret_p); } +static void acpi_video_bus_device_release(struct device *dev) +{ + struct auxiliary_device *aux_dev = to_auxiliary_dev(dev); + + kfree(aux_dev); +} + +static void acpi_create_video_bus_device(struct acpi_device *adev, + struct acpi_device *parent) +{ + struct auxiliary_device *aux_dev; + static unsigned int aux_dev_id; + + aux_dev = kzalloc_obj(*aux_dev); + if (!aux_dev) + return; + + aux_dev->id = aux_dev_id++; + aux_dev->name = "video_bus"; + aux_dev->dev.parent = acpi_get_first_physical_node(parent); + if (!aux_dev->dev.parent) + goto err; + + aux_dev->dev.release = acpi_video_bus_device_release; + + if (auxiliary_device_init(aux_dev)) + goto err; + + ACPI_COMPANION_SET(&aux_dev->dev, adev); + if (__auxiliary_device_add(aux_dev, "acpi")) + auxiliary_device_uninit(aux_dev); + + return; + +err: + kfree(aux_dev); +} + struct acpi_scan_system_dev { struct list_head node; struct acpi_device *adev; @@ -2229,6 +2268,12 @@ static void acpi_default_enumeration(struct acpi_device *device) sd->adev = device; list_add_tail(&sd->node, &acpi_scan_system_dev_list); } + } else if (device->pnp.type.backlight) { + struct acpi_device *parent; + + parent = acpi_dev_parent(device); + if (parent) + acpi_create_video_bus_device(device, parent); } else { /* For a regular device object, create a platform device. */ acpi_create_platform_device(device, NULL); |