stmmac: add new DT platform entries for GMAC4

This is to support the snps,dwmac-4.00 and snps,dwmac-4.10a
and related features on the platform driver.
See binding doc for further details.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 11 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index 6605d19601c2..4d302db657c0 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -59,6 +59,8 @@ Optional properties:
         - snps,fb: fixed-burst
         - snps,mb: mixed-burst
         - snps,rb: rebuild INCRx Burst
+        - snps,tso: this enables the TSO feature otherwise it will be managed by
+            MAC HW capability register.
 - mdio: with compatible = "snps,dwmac-mdio", create and register mdio bus.
 
 Examples:
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index cf37ea558ecc..effaa4ff5ab7 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -284,6 +284,13 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
                 plat->pmt = 1;
         }
 
+        if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
+            of_device_is_compatible(np, "snps,dwmac-4.10a")) {
+                plat->has_gmac4 = 1;
+                plat->pmt = 1;
+                plat->tso_en = of_property_read_bool(np, "snps,tso");
+        }
+
         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
                 plat->enh_desc = 1;
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index e6bc30a42a74..ffdaca9c01af 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -137,5 +137,7 @@ struct plat_stmmacenet_data {
         void (*exit)(struct platform_device *pdev, void *priv);
         void *bsp_priv;
         struct stmmac_axi *axi;
+        int has_gmac4;
+        bool tso_en;
 };
 #endif