pnp: Allow searching PNP device by port and device ID.
To access superio in ramstage, we need to find the device by PNP path.
Original-Change-Id: Iea4451381545f7c401e212ac7d7567a32aa92b25
Original-Reviewed-on: https://chromium-review.googlesource.com/190841
BRANCH=zako
BUG=chrome-os-partner:25024
TEST=emerge-zako chromeos-coreboot-zako
Change-Id: I6118177e5d62b32596caeb119800e8716c998a90
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/190972
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
diff --git a/src/device/device_util.c b/src/device/device_util.c
index 9b3e21f..efefa88 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -114,6 +114,29 @@
}
/**
+ * Find a PNP device of given port and device ID.
+ *
+ * @param port A PNP port ID.
+ * @param device A PNP device ID.
+ * @return Pointer to the device struct.
+ */
+struct device *dev_find_pnp(unsigned int port, unsigned int device)
+{
+ struct device *dev, *result;
+
+ result = NULL;
+ 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)) {
+ 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 b0168fc..3d74ecf 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -159,6 +159,7 @@
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_lapic(unsigned apic_id);
+device_t dev_find_pnp(unsigned int port, unsigned int device);
int dev_count_cpu(void);
void remap_bsp_lapic(struct bus *cpu_bus);
