tile: support PTP using the tilegx mPIPE (IEEE 1588)

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/tile/gxio/iorpc_mpipe.c b/arch/tile/gxio/iorpc_mpipe.c
index c2fb15167aee..4f8f3d619c4a 100644
--- a/arch/tile/gxio/iorpc_mpipe.c
+++ b/arch/tile/gxio/iorpc_mpipe.c
@@ -475,6 +475,25 @@ int gxio_mpipe_adjust_timestamp_aux(gxio_mpipe_context_t * context,
 
 EXPORT_SYMBOL(gxio_mpipe_adjust_timestamp_aux);
 
+struct adjust_timestamp_freq_param {
+        int32_t ppb;
+};
+
+int gxio_mpipe_adjust_timestamp_freq(gxio_mpipe_context_t * context,
+                                     int32_t ppb)
+{
+        struct adjust_timestamp_freq_param temp;
+        struct adjust_timestamp_freq_param *params = &temp;
+
+        params->ppb = ppb;
+
+        return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
+                             sizeof(*params),
+                             GXIO_MPIPE_OP_ADJUST_TIMESTAMP_FREQ);
+}
+
+EXPORT_SYMBOL(gxio_mpipe_adjust_timestamp_freq);
+
 struct config_edma_ring_blks_param {
         unsigned int ering;
         unsigned int max_blks;