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driver core / ACPI: Represent ACPI companions using fwnode_handle

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Now that we have struct fwnode_handle, we can use that to point to
ACPI companions from struct device objects instead of pointing to
struct acpi_device directly.

There are two benefits from that.  First, the somewhat ugly and
hackish struct acpi_dev_node can be dropped and, second, the same
struct fwnode_handle pointer can be used in the future to point
to other (non-ACPI) firmware device node types.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Rafael J. Wysocki
2015-03-16 23:49:03 +01:00
parent 06e5801b8c
commit ce793486e2
12 changed files with 44 additions and 31 deletions
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5
include/linux/acpi.h
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@@ -53,8 +53,9 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
return adev ? adev->handle : NULL;
}
#define ACPI_COMPANION(dev) ((dev)->acpi_node.companion)
#define ACPI_COMPANION_SET(dev, adev) ACPI_COMPANION(dev) = (adev)
#define ACPI_COMPANION(dev) acpi_node((dev)->fwnode)
#define ACPI_COMPANION_SET(dev, adev) (dev)->fwnode = (adev) ? \
acpi_fwnode_handle(adev) : NULL
#define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev))
static inline void acpi_preset_companion(struct device *dev,