diff --git a/Documentation/networking/devlink/stmmac.rst b/Documentation/networking/devlink/stmmac.rst
index e8e33d1c7baf..47e3ff10bc08 100644
--- a/Documentation/networking/devlink/stmmac.rst
+++ b/Documentation/networking/devlink/stmmac.rst
@@ -19,13 +19,22 @@ The ``stmmac`` driver implements the following driver-specific parameters.
      - Type
      - Mode
      - Description
-   * - ``ts_coarse``
+   * - ``phc_coarse_adj``
      - Boolean
      - runtime
-     - Enable the Coarse timestamping mode. In Coarse mode, the ptp clock is
-       expected to be updated through an external PPS input, but the subsecond
-       increment used for timestamping is set to 1/ptp_clock_rate. In Fine mode
-       (i.e. Coarse mode == false), the ptp clock frequency is adjusted more
-       frequently, but the subsecond increment is set to 2/ptp_clock_rate.
+     - Enable the Coarse timestamping mode, as defined in the DWMAC TRM.
+       A detailed explanation of this timestamping mode can be found in the
+       Socfpga Functionnal Description [1].
+
+       In Coarse mode, the ptp clock is expected to be fed by a high-precision
+       clock that is externally adjusted, and the subsecond increment used for
+       timestamping is set to 1/ptp_clock_rate.
+
+       In Fine mode (i.e. Coarse mode == false), the ptp clock frequency is
+       continuously adjusted, but the subsecond increment is set to
+       2/ptp_clock_rate.
+
        Coarse mode is suitable for PTP Grand Master operation. If unsure, leave
        the parameter to False.
+
+       [1] https://www.intel.com/content/www/us/en/docs/programmable/683126/21-2/functional-description-of-the-emac.html
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 1e69c1a7dc6c..c2a783c8022d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7445,7 +7445,7 @@ static int stmmac_dl_ts_coarse_get(struct devlink *dl, u32 id,
 }
 
 static const struct devlink_param stmmac_devlink_params[] = {
-	DEVLINK_PARAM_DRIVER(STMMAC_DEVLINK_PARAM_ID_TS_COARSE, "ts_coarse",
+	DEVLINK_PARAM_DRIVER(STMMAC_DEVLINK_PARAM_ID_TS_COARSE, "phc_coarse_adj",
 			     DEVLINK_PARAM_TYPE_BOOL,
 			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
 			     stmmac_dl_ts_coarse_get,