svn commit: r258164 - head/sys/dev/acpica

[Alexander Motin]

Author: mav
Date: Fri Nov 15 11:32:19 2013
New Revision: 258164
URL: http://svnweb.freebsd.org/changeset/base/258164

Log:
  Handle case when ACPI reports HPET device, but does not provide memory
  resource for it.  In such case take the address range from the HPET table.
  
  This fixes hpet(4) driver attach on Asrock C2750D4I board.

Modified:
  head/sys/dev/acpica/acpi_hpet.c

Modified: head/sys/dev/acpica/acpi_hpet.c
==============================================================================
--- head/sys/dev/acpica/acpi_hpet.c	Fri Nov 15 11:15:30 2013	(r258163)
+++ head/sys/dev/acpica/acpi_hpet.c	Fri Nov 15 11:32:19 2013	(r258164)
@@ -293,7 +293,7 @@ hpet_find(ACPI_HANDLE handle, UINT32 lev
 		return (AE_OK);
 	if (ACPI_FAILURE(acpi_GetInteger(handle, "_UID", &uid)) ||
 	    id == uid)
-		*((int *)status) = 1;
+		*status = acpi_get_device(handle);
 	return (AE_OK);
 }
 
@@ -321,7 +321,7 @@ hpet_identify(driver_t *driver, device_t
 	ACPI_TABLE_HPET *hpet;
 	ACPI_STATUS	status;
 	device_t	child;
-	int 		i, found;
+	int		i;
 
 	/* Only one HPET device can be added. */
 	if (devclass_get_device(hpet_devclass, 0))
@@ -332,12 +332,18 @@ hpet_identify(driver_t *driver, device_t
 		if (ACPI_FAILURE(status))
 			return;
 		/* Search for HPET device with same ID. */
-		found = 0;
+		child = NULL;
 		AcpiWalkNamespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
-		    100, hpet_find, NULL, (void *)(uintptr_t)hpet->Sequence, (void *)&found);
+		    100, hpet_find, NULL, (void *)(uintptr_t)hpet->Sequence,
+		    (void *)&child);
 		/* If found - let it be probed in normal way. */
-		if (found)
+		if (child) {
+			if (bus_get_resource(child, SYS_RES_MEMORY, 0,
+			    NULL, NULL) != 0)
+				bus_set_resource(child, SYS_RES_MEMORY, 0,
+				    hpet->Address.Address, HPET_MEM_WIDTH);
 			continue;
+		}
 		/* If not - create it from table info. */
 		child = BUS_ADD_CHILD(parent, 2, "hpet", 0);
 		if (child == NULL) {