device_util: Add dev_find_slot_pnp.

Change-Id: I5223c54c8ddbc60a176e4d718730e99decc772a3
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5112
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/device/device_util.c b/src/device/device_util.c
index 38654fa586..83decc1188 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -94,6 +94,27 @@ struct device *dev_find_slot_on_smbus(unsigned int bus, unsigned int addr)
 }
 
 /**
+ * Given a PnP port and a device number, find the device structure.
+ *
+ * @param port The I/O port.
+ * @param device Logical device number.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+struct device *dev_find_slot_pnp(u16 port, u8 device)
+{
+	struct device *dev;
+
+	for (dev = all_devices; dev; dev = dev->next) {
+		if ((dev->path.type == DEVICE_PATH_PNP) &&
+		    (dev->path.pnp.port == port) &&
+		    (dev->path.pnp.device == device)) {
+			return dev;
+		}
+	}
+	return 0;
+}
+
+/**
  * Given a Local APIC ID, find the device structure.
  *
  * @param apic_id The Local APIC ID number.
diff --git a/src/include/device/device.h b/src/include/device/device.h
index c1a2c3d117..f05ddea1dd 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -169,6 +169,7 @@ device_t dev_find_device (u16 vendor, u16 device, device_t from);
 device_t dev_find_class (unsigned int class, device_t from);
 device_t dev_find_slot (unsigned int bus, unsigned int devfn);
 device_t dev_find_slot_on_smbus (unsigned int bus, unsigned int addr);
+device_t dev_find_slot_pnp(u16 port, u8 device);
 device_t dev_find_lapic(unsigned apic_id);
 int dev_count_cpu(void);