1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 28a53e4a925f..98321298cffd 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -201,6 +201,10 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
                 }
                 radeon_set_filp_rights(dev, &rdev->cmask_filp, filp, &value);
                 break;
+        case RADEON_INFO_CLOCK_CRYSTAL_FREQ:
+                /* return clock value in KHz */
+                value = rdev->clock.spll.reference_freq * 10;
+                break;
         default:
                 DRM_DEBUG_KMS("Invalid request %d\n", info->request);
                 return -EINVAL;