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Diffstat (limited to 'sound/soc/intel/common/sst-match-acpi.c')
-rw-r--r--sound/soc/intel/common/sst-match-acpi.c45
1 files changed, 40 insertions, 5 deletions
diff --git a/sound/soc/intel/common/sst-match-acpi.c b/sound/soc/intel/common/sst-match-acpi.c
index 3b4539d21492..789843307a49 100644
--- a/sound/soc/intel/common/sst-match-acpi.c
+++ b/sound/soc/intel/common/sst-match-acpi.c
@@ -13,17 +13,53 @@
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
-#include <linux/acpi.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
#include "sst-acpi.h"
+static acpi_status sst_acpi_find_name(acpi_handle handle, u32 level,
+ void *context, void **ret)
+{
+ struct acpi_device *adev;
+ const char *name = NULL;
+
+ if (acpi_bus_get_device(handle, &adev))
+ return AE_OK;
+
+ if (adev->status.present && adev->status.functional) {
+ name = acpi_dev_name(adev);
+ *(const char **)ret = name;
+ return AE_CTRL_TERMINATE;
+ }
+
+ return AE_OK;
+}
+
+const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN])
+{
+ const char *name = NULL;
+ acpi_status status;
+
+ status = acpi_get_devices(hid, sst_acpi_find_name, NULL,
+ (void **)&name);
+
+ if (ACPI_FAILURE(status) || name[0] == '\0')
+ return NULL;
+
+ return name;
+}
+EXPORT_SYMBOL_GPL(sst_acpi_find_name_from_hid);
+
static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
void *context, void **ret)
{
+ unsigned long long sta;
+ acpi_status status;
+
*(bool *)context = true;
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT))
+ *(bool *)context = false;
+
return AE_OK;
}
@@ -37,7 +73,6 @@ struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
sst_acpi_mach_match,
&found, NULL)) && found)
return mach;
-
return NULL;
}
EXPORT_SYMBOL_GPL(sst_acpi_find_machine);