diff --git a/pkg/apis/resource/types.go b/pkg/apis/resource/types.go
index faac04e6dc8..dd9e76d8bdc 100644
--- a/pkg/apis/resource/types.go
+++ b/pkg/apis/resource/types.go
@@ -1602,8 +1602,8 @@ type AllocationConfigSource string
 
 // Valid [DeviceAllocationConfiguration.Source] values.
 const (
-	AllocationConfigSourceClass = "FromClass"
-	AllocationConfigSourceClaim = "FromClaim"
+	AllocationConfigSourceClass AllocationConfigSource = "FromClass"
+	AllocationConfigSourceClaim AllocationConfigSource = "FromClaim"
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
diff --git a/pkg/apis/resource/v1/zz_generated.validations.go b/pkg/apis/resource/v1/zz_generated.validations.go
index 5646a737884..51ad4ae6a26 100644
--- a/pkg/apis/resource/v1/zz_generated.validations.go
+++ b/pkg/apis/resource/v1/zz_generated.validations.go
@@ -124,6 +124,16 @@ func Validate_AllocatedDeviceStatus(ctx context.Context, op operation.Operation,
 	return errs
 }
 
+var symbolsForAllocationConfigSource = sets.New(resourcev1.AllocationConfigSourceClaim, resourcev1.AllocationConfigSourceClass)
+
+// Validate_AllocationConfigSource validates an instance of AllocationConfigSource according
+// to declarative validation rules in the API schema.
+func Validate_AllocationConfigSource(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1.AllocationConfigSource) (errs field.ErrorList) {
+	errs = append(errs, validate.Enum(ctx, op, fldPath, obj, oldObj, symbolsForAllocationConfigSource, nil)...)
+
+	return errs
+}
+
 // Validate_AllocationResult validates an instance of AllocationResult according
 // to declarative validation rules in the API schema.
 func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1.AllocationResult) (errs field.ErrorList) {
@@ -147,7 +157,29 @@ func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldP
 // Validate_DeviceAllocationConfiguration validates an instance of DeviceAllocationConfiguration according
 // to declarative validation rules in the API schema.
 func Validate_DeviceAllocationConfiguration(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1.DeviceAllocationConfiguration) (errs field.ErrorList) {
-	// field resourcev1.DeviceAllocationConfiguration.Source has no validation
+	// field resourcev1.DeviceAllocationConfiguration.Source
+	errs = append(errs,
+		func(fldPath *field.Path, obj, oldObj *resourcev1.AllocationConfigSource) (errs field.ErrorList) {
+			// don't revalidate unchanged data
+			if op.Type == operation.Update && (obj == oldObj || (obj != nil && oldObj != nil && *obj == *oldObj)) {
+				return nil
+			}
+			// call field-attached validations
+			earlyReturn := false
+			if e := validate.RequiredValue(ctx, op, fldPath, obj, oldObj); len(e) != 0 {
+				errs = append(errs, e...)
+				earlyReturn = true
+			}
+			if earlyReturn {
+				return // do not proceed
+			}
+			// call the type's validation function
+			errs = append(errs, Validate_AllocationConfigSource(ctx, op, fldPath, obj, oldObj)...)
+			return
+		}(fldPath.Child("source"), &obj.Source, safe.Field(oldObj, func(oldObj *resourcev1.DeviceAllocationConfiguration) *resourcev1.AllocationConfigSource {
+			return &oldObj.Source
+		}))...)
+
 	// field resourcev1.DeviceAllocationConfiguration.Requests has no validation
 
 	// field resourcev1.DeviceAllocationConfiguration.DeviceConfiguration
diff --git a/pkg/apis/resource/v1beta1/zz_generated.validations.go b/pkg/apis/resource/v1beta1/zz_generated.validations.go
index 3f0faed68fd..ce7ecf73c0e 100644
--- a/pkg/apis/resource/v1beta1/zz_generated.validations.go
+++ b/pkg/apis/resource/v1beta1/zz_generated.validations.go
@@ -124,6 +124,16 @@ func Validate_AllocatedDeviceStatus(ctx context.Context, op operation.Operation,
 	return errs
 }
 
+var symbolsForAllocationConfigSource = sets.New(resourcev1beta1.AllocationConfigSourceClaim, resourcev1beta1.AllocationConfigSourceClass)
+
+// Validate_AllocationConfigSource validates an instance of AllocationConfigSource according
+// to declarative validation rules in the API schema.
+func Validate_AllocationConfigSource(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta1.AllocationConfigSource) (errs field.ErrorList) {
+	errs = append(errs, validate.Enum(ctx, op, fldPath, obj, oldObj, symbolsForAllocationConfigSource, nil)...)
+
+	return errs
+}
+
 // Validate_AllocationResult validates an instance of AllocationResult according
 // to declarative validation rules in the API schema.
 func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta1.AllocationResult) (errs field.ErrorList) {
@@ -149,7 +159,29 @@ func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldP
 // Validate_DeviceAllocationConfiguration validates an instance of DeviceAllocationConfiguration according
 // to declarative validation rules in the API schema.
 func Validate_DeviceAllocationConfiguration(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta1.DeviceAllocationConfiguration) (errs field.ErrorList) {
-	// field resourcev1beta1.DeviceAllocationConfiguration.Source has no validation
+	// field resourcev1beta1.DeviceAllocationConfiguration.Source
+	errs = append(errs,
+		func(fldPath *field.Path, obj, oldObj *resourcev1beta1.AllocationConfigSource) (errs field.ErrorList) {
+			// don't revalidate unchanged data
+			if op.Type == operation.Update && (obj == oldObj || (obj != nil && oldObj != nil && *obj == *oldObj)) {
+				return nil
+			}
+			// call field-attached validations
+			earlyReturn := false
+			if e := validate.RequiredValue(ctx, op, fldPath, obj, oldObj); len(e) != 0 {
+				errs = append(errs, e...)
+				earlyReturn = true
+			}
+			if earlyReturn {
+				return // do not proceed
+			}
+			// call the type's validation function
+			errs = append(errs, Validate_AllocationConfigSource(ctx, op, fldPath, obj, oldObj)...)
+			return
+		}(fldPath.Child("source"), &obj.Source, safe.Field(oldObj, func(oldObj *resourcev1beta1.DeviceAllocationConfiguration) *resourcev1beta1.AllocationConfigSource {
+			return &oldObj.Source
+		}))...)
+
 	// field resourcev1beta1.DeviceAllocationConfiguration.Requests has no validation
 
 	// field resourcev1beta1.DeviceAllocationConfiguration.DeviceConfiguration
diff --git a/pkg/apis/resource/v1beta2/zz_generated.validations.go b/pkg/apis/resource/v1beta2/zz_generated.validations.go
index 0234fdf299d..fa243373ee9 100644
--- a/pkg/apis/resource/v1beta2/zz_generated.validations.go
+++ b/pkg/apis/resource/v1beta2/zz_generated.validations.go
@@ -124,6 +124,16 @@ func Validate_AllocatedDeviceStatus(ctx context.Context, op operation.Operation,
 	return errs
 }
 
+var symbolsForAllocationConfigSource = sets.New(resourcev1beta2.AllocationConfigSourceClaim, resourcev1beta2.AllocationConfigSourceClass)
+
+// Validate_AllocationConfigSource validates an instance of AllocationConfigSource according
+// to declarative validation rules in the API schema.
+func Validate_AllocationConfigSource(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta2.AllocationConfigSource) (errs field.ErrorList) {
+	errs = append(errs, validate.Enum(ctx, op, fldPath, obj, oldObj, symbolsForAllocationConfigSource, nil)...)
+
+	return errs
+}
+
 // Validate_AllocationResult validates an instance of AllocationResult according
 // to declarative validation rules in the API schema.
 func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta2.AllocationResult) (errs field.ErrorList) {
@@ -149,7 +159,29 @@ func Validate_AllocationResult(ctx context.Context, op operation.Operation, fldP
 // Validate_DeviceAllocationConfiguration validates an instance of DeviceAllocationConfiguration according
 // to declarative validation rules in the API schema.
 func Validate_DeviceAllocationConfiguration(ctx context.Context, op operation.Operation, fldPath *field.Path, obj, oldObj *resourcev1beta2.DeviceAllocationConfiguration) (errs field.ErrorList) {
-	// field resourcev1beta2.DeviceAllocationConfiguration.Source has no validation
+	// field resourcev1beta2.DeviceAllocationConfiguration.Source
+	errs = append(errs,
+		func(fldPath *field.Path, obj, oldObj *resourcev1beta2.AllocationConfigSource) (errs field.ErrorList) {
+			// don't revalidate unchanged data
+			if op.Type == operation.Update && (obj == oldObj || (obj != nil && oldObj != nil && *obj == *oldObj)) {
+				return nil
+			}
+			// call field-attached validations
+			earlyReturn := false
+			if e := validate.RequiredValue(ctx, op, fldPath, obj, oldObj); len(e) != 0 {
+				errs = append(errs, e...)
+				earlyReturn = true
+			}
+			if earlyReturn {
+				return // do not proceed
+			}
+			// call the type's validation function
+			errs = append(errs, Validate_AllocationConfigSource(ctx, op, fldPath, obj, oldObj)...)
+			return
+		}(fldPath.Child("source"), &obj.Source, safe.Field(oldObj, func(oldObj *resourcev1beta2.DeviceAllocationConfiguration) *resourcev1beta2.AllocationConfigSource {
+			return &oldObj.Source
+		}))...)
+
 	// field resourcev1beta2.DeviceAllocationConfiguration.Requests has no validation
 
 	// field resourcev1beta2.DeviceAllocationConfiguration.DeviceConfiguration
diff --git a/pkg/apis/resource/validation/validation.go b/pkg/apis/resource/validation/validation.go
index 39633e99037..9af9eafed1f 100644
--- a/pkg/apis/resource/validation/validation.go
+++ b/pkg/apis/resource/validation/validation.go
@@ -525,10 +525,10 @@ func validateAllocationConfigSource(source resource.AllocationConfigSource, fldP
 	var allErrs field.ErrorList
 	switch source {
 	case "":
-		allErrs = append(allErrs, field.Required(fldPath, ""))
+		allErrs = append(allErrs, field.Required(fldPath, "").MarkCoveredByDeclarative())
 	case resource.AllocationConfigSourceClaim, resource.AllocationConfigSourceClass:
 	default:
-		allErrs = append(allErrs, field.NotSupported(fldPath, source, []resource.AllocationConfigSource{resource.AllocationConfigSourceClaim, resource.AllocationConfigSourceClass}))
+		allErrs = append(allErrs, field.NotSupported(fldPath, source, []resource.AllocationConfigSource{resource.AllocationConfigSourceClaim, resource.AllocationConfigSourceClass}).MarkCoveredByDeclarative())
 	}
 	return allErrs
 }
diff --git a/pkg/apis/resource/validation/validation_resourceclaim_test.go b/pkg/apis/resource/validation/validation_resourceclaim_test.go
index dd78523a3aa..272830cd812 100644
--- a/pkg/apis/resource/validation/validation_resourceclaim_test.go
+++ b/pkg/apis/resource/validation/validation_resourceclaim_test.go
@@ -1198,8 +1198,8 @@ func TestValidateClaimStatusUpdate(t *testing.T) {
 		},
 		"configuration": {
 			wantFailures: field.ErrorList{
-				field.Required(field.NewPath("status", "allocation", "devices", "config").Index(1).Child("source"), ""),
-				field.NotSupported(field.NewPath("status", "allocation", "devices", "config").Index(2).Child("source"), resource.AllocationConfigSource("no-such-source"), []resource.AllocationConfigSource{resource.AllocationConfigSourceClaim, resource.AllocationConfigSourceClass}),
+				field.Required(field.NewPath("status", "allocation", "devices", "config").Index(1).Child("source"), "").MarkCoveredByDeclarative(),
+				field.NotSupported(field.NewPath("status", "allocation", "devices", "config").Index(2).Child("source"), resource.AllocationConfigSource("no-such-source"), []resource.AllocationConfigSource{resource.AllocationConfigSourceClaim, resource.AllocationConfigSourceClass}).MarkCoveredByDeclarative(),
 				field.Required(field.NewPath("status", "allocation", "devices", "config").Index(3).Child("opaque"), ""),
 				field.Required(field.NewPath("status", "allocation", "devices", "config").Index(4).Child("opaque", "driver"), "").MarkCoveredByDeclarative(),
 				field.Required(field.NewPath("status", "allocation", "devices", "config").Index(4).Child("opaque", "parameters"), ""),
diff --git a/pkg/generated/openapi/zz_generated.openapi.go b/pkg/generated/openapi/zz_generated.openapi.go
index d0116b33d9a..1e44669b46e 100644
--- a/pkg/generated/openapi/zz_generated.openapi.go
+++ b/pkg/generated/openapi/zz_generated.openapi.go
@@ -48461,10 +48461,11 @@ func schema_k8sio_api_resource_v1_DeviceAllocationConfiguration(ref common.Refer
 				Properties: map[string]spec.Schema{
 					"source": {
 						SchemaProps: spec.SchemaProps{
-							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.",
+							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.\n\n\nPossible enum values:\n - `\"FromClaim\"`\n - `\"FromClass\"`",
 							Default:     "",
 							Type:        []string{"string"},
 							Format:      "",
+							Enum:        []interface{}{"FromClaim", "FromClass"},
 						},
 					},
 					"requests": {
@@ -50950,10 +50951,11 @@ func schema_k8sio_api_resource_v1beta1_DeviceAllocationConfiguration(ref common.
 				Properties: map[string]spec.Schema{
 					"source": {
 						SchemaProps: spec.SchemaProps{
-							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.",
+							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.\n\n\nPossible enum values:\n - `\"FromClaim\"`\n - `\"FromClass\"`",
 							Default:     "",
 							Type:        []string{"string"},
 							Format:      "",
+							Enum:        []interface{}{"FromClaim", "FromClass"},
 						},
 					},
 					"requests": {
@@ -53121,10 +53123,11 @@ func schema_k8sio_api_resource_v1beta2_DeviceAllocationConfiguration(ref common.
 				Properties: map[string]spec.Schema{
 					"source": {
 						SchemaProps: spec.SchemaProps{
-							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.",
+							Description: "Source records whether the configuration comes from a class and thus is not something that a normal user would have been able to set or from a claim.\n\n\nPossible enum values:\n - `\"FromClaim\"`\n - `\"FromClass\"`",
 							Default:     "",
 							Type:        []string{"string"},
 							Format:      "",
+							Enum:        []interface{}{"FromClaim", "FromClass"},
 						},
 					},
 					"requests": {
diff --git a/pkg/registry/resource/resourceclaim/declarative_validation_test.go b/pkg/registry/resource/resourceclaim/declarative_validation_test.go
index 4de08284980..eaca2c72339 100644
--- a/pkg/registry/resource/resourceclaim/declarative_validation_test.go
+++ b/pkg/registry/resource/resourceclaim/declarative_validation_test.go
@@ -652,6 +652,7 @@ func testValidateStatusUpdateForDeclarative(t *testing.T, apiVersion string) {
 		Subresource: "status",
 	})
 	poolPath := field.NewPath("status", "allocation", "devices", "results").Index(0).Child("pool")
+	configSourcePath := field.NewPath("status", "allocation", "devices", "config").Index(0).Child("source")
 	testCases := map[string]struct {
 		old          resource.ResourceClaim
 		update       resource.ResourceClaim
@@ -880,6 +881,29 @@ func testValidateStatusUpdateForDeclarative(t *testing.T, apiVersion string) {
 				field.TooMany(field.NewPath("status", "allocation", "devices", "config"), 33, 32).WithOrigin("maxItems"),
 			},
 		},
+		// .Status.Allocation.Devices.Config[%d].Source
+		"valid status.allocation.devices.config source FromClass": {
+			old:    mkValidResourceClaim(),
+			update: mkResourceClaimWithStatus(tweakStatusAllocationConfigSource(resource.AllocationConfigSourceClass)),
+		},
+		"valid status.allocation.devices.config source FromClaim": {
+			old:    mkValidResourceClaim(),
+			update: mkResourceClaimWithStatus(tweakStatusAllocationConfigSource(resource.AllocationConfigSourceClaim)),
+		},
+		"invalid status.allocation.devices.config source empty": {
+			old:    mkValidResourceClaim(),
+			update: mkResourceClaimWithStatus(tweakStatusAllocationConfigSource("")),
+			expectedErrs: field.ErrorList{
+				field.Required(configSourcePath, "").MarkCoveredByDeclarative(),
+			},
+		},
+		"invalid status.allocation.devices.config source invalid": {
+			old:    mkValidResourceClaim(),
+			update: mkResourceClaimWithStatus(tweakStatusAllocationConfigSource("invalid")),
+			expectedErrs: field.ErrorList{
+				field.NotSupported(configSourcePath, resource.AllocationConfigSource("invalid"), []string{string(resource.AllocationConfigSourceClaim), string(resource.AllocationConfigSourceClass)}).MarkCoveredByDeclarative(),
+			},
+		},
 	}
 	for k, tc := range testCases {
 		t.Run(k, func(t *testing.T) {
@@ -1142,3 +1166,26 @@ func addStatusAllocationResult(obj resource.ResourceClaim) resource.ResourceClai
 	}
 	return obj
 }
+
+func tweakStatusAllocationConfigSource(source resource.AllocationConfigSource) func(rc *resource.ResourceClaim) {
+	return func(rc *resource.ResourceClaim) {
+		if rc.Status.Allocation == nil {
+			rc.Status.Allocation = &resource.AllocationResult{}
+		}
+		if len(rc.Status.Allocation.Devices.Config) == 0 {
+			rc.Status.Allocation.Devices.Config = append(rc.Status.Allocation.Devices.Config, resource.DeviceAllocationConfiguration{
+				Source:   resource.AllocationConfigSourceClaim,
+				Requests: []string{"req-0"},
+				DeviceConfiguration: resource.DeviceConfiguration{
+					Opaque: &resource.OpaqueDeviceConfiguration{
+						Driver: "dra.example.com",
+						Parameters: runtime.RawExtension{
+							Raw: []byte(`{"kind": "foo", "apiVersion": "dra.example.com/v1"}`),
+						},
+					},
+				},
+			})
+		}
+		rc.Status.Allocation.Devices.Config[0].Source = source
+	}
+}
diff --git a/staging/src/k8s.io/api/resource/v1/generated.proto b/staging/src/k8s.io/api/resource/v1/generated.proto
index 44e95b6221b..15e63c6c930 100644
--- a/staging/src/k8s.io/api/resource/v1/generated.proto
+++ b/staging/src/k8s.io/api/resource/v1/generated.proto
@@ -464,6 +464,7 @@ message DeviceAllocationConfiguration {
   // or from a claim.
   //
   // +required
+  // +k8s:required
   optional string source = 1;
 
   // Requests lists the names of requests where the configuration applies.
diff --git a/staging/src/k8s.io/api/resource/v1/types.go b/staging/src/k8s.io/api/resource/v1/types.go
index 75fee50d27e..c1e78a41939 100644
--- a/staging/src/k8s.io/api/resource/v1/types.go
+++ b/staging/src/k8s.io/api/resource/v1/types.go
@@ -1632,6 +1632,7 @@ type DeviceAllocationConfiguration struct {
 	// or from a claim.
 	//
 	// +required
+	// +k8s:required
 	Source AllocationConfigSource `json:"source" protobuf:"bytes,1,name=source"`
 
 	// Requests lists the names of requests where the configuration applies.
@@ -1648,12 +1649,14 @@ type DeviceAllocationConfiguration struct {
 	DeviceConfiguration `json:",inline" protobuf:"bytes,3,name=deviceConfiguration"`
 }
 
+// +enum
+// +k8s:enum
 type AllocationConfigSource string
 
 // Valid [DeviceAllocationConfiguration.Source] values.
 const (
-	AllocationConfigSourceClass = "FromClass"
-	AllocationConfigSourceClaim = "FromClaim"
+	AllocationConfigSourceClass AllocationConfigSource = "FromClass"
+	AllocationConfigSourceClaim AllocationConfigSource = "FromClaim"
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
diff --git a/staging/src/k8s.io/api/resource/v1beta1/generated.proto b/staging/src/k8s.io/api/resource/v1beta1/generated.proto
index ea9b92880e6..315b4860566 100644
--- a/staging/src/k8s.io/api/resource/v1beta1/generated.proto
+++ b/staging/src/k8s.io/api/resource/v1beta1/generated.proto
@@ -472,6 +472,7 @@ message DeviceAllocationConfiguration {
   // or from a claim.
   //
   // +required
+  // +k8s:required
   optional string source = 1;
 
   // Requests lists the names of requests where the configuration applies.
diff --git a/staging/src/k8s.io/api/resource/v1beta1/types.go b/staging/src/k8s.io/api/resource/v1beta1/types.go
index 22bf9c3d28c..a655415b95a 100644
--- a/staging/src/k8s.io/api/resource/v1beta1/types.go
+++ b/staging/src/k8s.io/api/resource/v1beta1/types.go
@@ -1640,6 +1640,7 @@ type DeviceAllocationConfiguration struct {
 	// or from a claim.
 	//
 	// +required
+	// +k8s:required
 	Source AllocationConfigSource `json:"source" protobuf:"bytes,1,name=source"`
 
 	// Requests lists the names of requests where the configuration applies.
@@ -1656,12 +1657,14 @@ type DeviceAllocationConfiguration struct {
 	DeviceConfiguration `json:",inline" protobuf:"bytes,3,name=deviceConfiguration"`
 }
 
+// +enum
+// +k8s:enum
 type AllocationConfigSource string
 
 // Valid [DeviceAllocationConfiguration.Source] values.
 const (
-	AllocationConfigSourceClass = "FromClass"
-	AllocationConfigSourceClaim = "FromClaim"
+	AllocationConfigSourceClass AllocationConfigSource = "FromClass"
+	AllocationConfigSourceClaim AllocationConfigSource = "FromClaim"
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
diff --git a/staging/src/k8s.io/api/resource/v1beta2/generated.proto b/staging/src/k8s.io/api/resource/v1beta2/generated.proto
index c864bdf4c15..ab05a3e0f54 100644
--- a/staging/src/k8s.io/api/resource/v1beta2/generated.proto
+++ b/staging/src/k8s.io/api/resource/v1beta2/generated.proto
@@ -464,6 +464,7 @@ message DeviceAllocationConfiguration {
   // or from a claim.
   //
   // +required
+  // +k8s:required
   optional string source = 1;
 
   // Requests lists the names of requests where the configuration applies.
diff --git a/staging/src/k8s.io/api/resource/v1beta2/types.go b/staging/src/k8s.io/api/resource/v1beta2/types.go
index 63b68845cb9..d621a702569 100644
--- a/staging/src/k8s.io/api/resource/v1beta2/types.go
+++ b/staging/src/k8s.io/api/resource/v1beta2/types.go
@@ -1632,6 +1632,7 @@ type DeviceAllocationConfiguration struct {
 	// or from a claim.
 	//
 	// +required
+	// +k8s:required
 	Source AllocationConfigSource `json:"source" protobuf:"bytes,1,name=source"`
 
 	// Requests lists the names of requests where the configuration applies.
@@ -1648,12 +1649,14 @@ type DeviceAllocationConfiguration struct {
 	DeviceConfiguration `json:",inline" protobuf:"bytes,3,name=deviceConfiguration"`
 }
 
+// +enum
+// +k8s:enum
 type AllocationConfigSource string
 
 // Valid [DeviceAllocationConfiguration.Source] values.
 const (
-	AllocationConfigSourceClass = "FromClass"
-	AllocationConfigSourceClaim = "FromClaim"
+	AllocationConfigSourceClass AllocationConfigSource = "FromClass"
+	AllocationConfigSourceClaim AllocationConfigSource = "FromClaim"
 )
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object