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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-08-27 02:35:14 (GMT) |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-09-14 23:47:33 (GMT) |
commit | bd8191cc8a74018e255eb3efff5e02dc305a5ed1 (patch) | |
tree | 35d5c9fec87888ad496c19f6827eae2ea3f9e0dd /drivers/acpi/property.c | |
parent | 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff) | |
download | linux-bd8191cc8a74018e255eb3efff5e02dc305a5ed1.tar.xz |
ACPI / property: Add routine for extraction of _DSD properties
Move the extraction of _DSD properties from acpi_init_properties()
to a separate routine called acpi_extract_properties() to make the
subsequent changes more straightforward.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/acpi/property.c')
-rw-r--r-- | drivers/acpi/property.c | 69 |
1 files changed, 37 insertions, 32 deletions
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 6d99450..8163b4b 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -100,34 +100,13 @@ static void acpi_init_of_compatible(struct acpi_device *adev) adev->flags.of_compatible_ok = 1; } -void acpi_init_properties(struct acpi_device *adev) +static bool acpi_extract_properties(const union acpi_object *desc, + struct acpi_device_data *data) { - struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; - bool acpi_of = false; - struct acpi_hardware_id *hwid; - const union acpi_object *desc; - acpi_status status; int i; - /* - * Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in - * Device Tree compatible properties for this device. - */ - list_for_each_entry(hwid, &adev->pnp.ids, list) { - if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) { - acpi_of = true; - break; - } - } - - status = acpi_evaluate_object_typed(adev->handle, "_DSD", NULL, &buf, - ACPI_TYPE_PACKAGE); - if (ACPI_FAILURE(status)) - goto out; - - desc = buf.pointer; if (desc->package.count % 2) - goto fail; + return false; /* Look for the device properties UUID. */ for (i = 0; i < desc->package.count; i += 2) { @@ -154,18 +133,44 @@ void acpi_init_properties(struct acpi_device *adev) if (!acpi_properties_format_valid(properties)) break; - adev->data.pointer = buf.pointer; - adev->data.properties = properties; + data->properties = properties; + return true; + } - if (acpi_of) - acpi_init_of_compatible(adev); + return false; +} - goto out; +void acpi_init_properties(struct acpi_device *adev) +{ + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; + struct acpi_hardware_id *hwid; + acpi_status status; + bool acpi_of = false; + + /* + * Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in + * Device Tree compatible properties for this device. + */ + list_for_each_entry(hwid, &adev->pnp.ids, list) { + if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) { + acpi_of = true; + break; + } } - fail: - dev_dbg(&adev->dev, "Returned _DSD data is not valid, skipping\n"); - ACPI_FREE(buf.pointer); + status = acpi_evaluate_object_typed(adev->handle, "_DSD", NULL, &buf, + ACPI_TYPE_PACKAGE); + if (ACPI_FAILURE(status)) + goto out; + + if (acpi_extract_properties(buf.pointer, &adev->data)) { + adev->data.pointer = buf.pointer; + if (acpi_of) + acpi_init_of_compatible(adev); + } else { + acpi_handle_debug(adev->handle, "Invalid _DSD data, skipping\n"); + ACPI_FREE(buf.pointer); + } out: if (acpi_of && !adev->flags.of_compatible_ok) |