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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 @@
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details. 14 * more details.
15 */ 15 */
16#include <linux/acpi.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20 16
21#include "sst-acpi.h" 17#include "sst-acpi.h"
22 18
19static acpi_status sst_acpi_find_name(acpi_handle handle, u32 level,
20 void *context, void **ret)
21{
22 struct acpi_device *adev;
23 const char *name = NULL;
24
25 if (acpi_bus_get_device(handle, &adev))
26 return AE_OK;
27
28 if (adev->status.present && adev->status.functional) {
29 name = acpi_dev_name(adev);
30 *(const char **)ret = name;
31 return AE_CTRL_TERMINATE;
32 }
33
34 return AE_OK;
35}
36
37const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN])
38{
39 const char *name = NULL;
40 acpi_status status;
41
42 status = acpi_get_devices(hid, sst_acpi_find_name, NULL,
43 (void **)&name);
44
45 if (ACPI_FAILURE(status) || name[0] == '\0')
46 return NULL;
47
48 return name;
49}
50EXPORT_SYMBOL_GPL(sst_acpi_find_name_from_hid);
51
23static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level, 52static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
24 void *context, void **ret) 53 void *context, void **ret)
25{ 54{
55 unsigned long long sta;
56 acpi_status status;
57
26 *(bool *)context = true; 58 *(bool *)context = true;
59 status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
60 if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT))
61 *(bool *)context = false;
62
27 return AE_OK; 63 return AE_OK;
28} 64}
29 65
@@ -37,7 +73,6 @@ struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
37 sst_acpi_mach_match, 73 sst_acpi_mach_match,
38 &found, NULL)) && found) 74 &found, NULL)) && found)
39 return mach; 75 return mach;
40
41 return NULL; 76 return NULL;
42} 77}
43EXPORT_SYMBOL_GPL(sst_acpi_find_machine); 78EXPORT_SYMBOL_GPL(sst_acpi_find_machine);