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authorSubrata Banik <subrata.banik@intel.com>2016-12-06 18:06:30 +0530
committerMartin Roth <martinroth@google.com>2016-12-07 22:55:20 +0100
commitfe204fe902f5d08dbf07e0f9686e4315c67292ea (patch)
treedc2ee1b0161ae9bec6de97cf6ce84922ba97a888
parentd6c555971b9f9f0c2d49269b0874e3480258531a (diff)
downloadcoreboot-fe204fe902f5d08dbf07e0f9686e4315c67292ea.tar.xz
src/device: Get device structure by path type
Add helper function to find a device by path type in the device tree. Change-Id: I8846f63bd2488788ea3c7ab5154e7cf431a252bc Credits-to: Aaron Durbin <adurbin@chromium.org> Signed-off-by: Subrata Banik <subrata.banik@intel.com> Signed-off-by: Dhaval V Sharma <dhaval.v.sharma@intel.com> Reviewed-on: https://review.coreboot.org/17731 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
-rw-r--r--src/device/device_util.c25
-rw-r--r--src/include/device/device.h1
2 files changed, 26 insertions, 0 deletions
diff --git a/src/device/device_util.c b/src/device/device_util.c
index 157f7b7443..cd33aac263 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -131,6 +131,31 @@ device_t dev_find_lapic(unsigned apic_id)
}
/**
+ * Given a Device Path Type, find the device structure.
+ *
+ * @param prev_match The previously matched device instance.
+ * @param path_type The Device Path Type.
+ * @return Pointer to the device structure (if found), 0 otherwise.
+ */
+device_t dev_find_path(device_t prev_match, enum device_path_type path_type)
+{
+ device_t dev, result = NULL;
+
+ if (prev_match == NULL)
+ prev_match = all_devices;
+ else
+ prev_match = prev_match->next;
+
+ for (dev = prev_match; dev; dev = dev->next) {
+ if (dev->path.type == path_type) {
+ result = dev;
+ break;
+ }
+ }
+ return result;
+}
+
+/**
* Find a device of a given vendor and type.
*
* @param vendor A PCI vendor ID (e.g. 0x8086 for Intel).
diff --git a/src/include/device/device.h b/src/include/device/device.h
index d81399d6ef..39bf718f1f 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -195,6 +195,7 @@ device_t find_dev_path(struct bus *parent, struct device_path *path);
device_t alloc_find_dev(struct bus *parent, struct device_path *path);
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_path(device_t prev_match, enum device_path_type path_type);
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, u16 device);