1 files changed, 23 insertions, 12 deletions

diff --git a/tools/power/cpupower/utils/helpers/pci.c b/tools/power/cpupower/utils/helpers/pci.c
index cd2eb6fe41c4..9690798e6446 100644
--- a/tools/power/cpupower/utils/helpers/pci.c
+++ b/tools/power/cpupower/utils/helpers/pci.c
@@ -10,19 +10,24 @@
  * **pacc : if a valid pci_dev is returned
  *         *pacc must be passed to pci_acc_cleanup to free it
  *
- * vendor_id : the pci vendor id matching the pci device to access
- * dev_ids :   device ids matching the pci device to access
+ * domain: domain
+ * bus:    bus
+ * slot:   slot
+ * func:   func
+ * vendor: vendor
+ * device: device
+ * Pass -1 for one of the six above to match any
  *
  * Returns :
  * struct pci_dev which can be used with pci_{read,write}_* functions
  *                to access the PCI config space of matching pci devices
  */
-struct pci_dev *pci_acc_init(struct pci_access **pacc, int vendor_id,
-                                    int *dev_ids)
+struct pci_dev *pci_acc_init(struct pci_access **pacc, int domain, int bus,
+                             int slot, int func, int vendor, int dev)
 {
-        struct pci_filter filter_nb_link = { -1, -1, -1, -1, vendor_id, 0};
+        struct pci_filter filter_nb_link = { domain, bus, slot, func,
+                                             vendor, dev };
         struct pci_dev *device;
-        unsigned int i;
 
         *pacc = pci_alloc();
         if (*pacc == NULL)
@@ -31,14 +36,20 @@ struct pci_dev *pci_acc_init(struct pci_access **pacc, int vendor_id,
         pci_init(*pacc);
         pci_scan_bus(*pacc);
 
-        for (i = 0; dev_ids[i] != 0; i++) {
-                filter_nb_link.device = dev_ids[i];
-                for (device = (*pacc)->devices; device; device = device->next) {
-                        if (pci_filter_match(&filter_nb_link, device))
-                                return device;
-                }
+        for (device = (*pacc)->devices; device; device = device->next) {
+                if (pci_filter_match(&filter_nb_link, device))
+                        return device;
         }
         pci_cleanup(*pacc);
         return NULL;
 }
+
+/* Typically one wants to get a specific slot(device)/func of the root domain
+   and bus */
+struct pci_dev *pci_slot_func_init(struct pci_access **pacc, int slot,
+                                       int func)
+{
+        return pci_acc_init(pacc, 0, 0, slot, func, -1, -1);
+}
+
 #endif /* defined(__i386__) || defined(__x86_64__) */