net: stmmac: Fallback to Platform Data clock in Watchdog conversion

[thirdparty/kernel/stable.git] / drivers / net / ethernet / stmicro / stmmac / stmmac_ethtool.c

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index d1f61c25d82bc8e25c1026bd20105614a73a1b05..5d85742a2be0b62189ce83dbc0de40714f6eb34c 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -721,8 +721,11 @@ static u32 stmmac_usec2riwt(u32 usec, struct stmmac_priv *priv)
 {
        unsigned long clk = clk_get_rate(priv->plat->stmmac_clk);
 
-       if (!clk)
-               return 0;
+       if (!clk) {
+               clk = priv->plat->clk_ref_rate;
+               if (!clk)
+                       return 0;
+       }
 
        return (usec * (clk / 1000000)) / 256;
 }
@@ -731,8 +734,11 @@ static u32 stmmac_riwt2usec(u32 riwt, struct stmmac_priv *priv)
 {
        unsigned long clk = clk_get_rate(priv->plat->stmmac_clk);
 
-       if (!clk)
-               return 0;
+       if (!clk) {
+               clk = priv->plat->clk_ref_rate;
+               if (!clk)
+                       return 0;
+       }
 
        return (riwt * 256) / (clk / 1000000);
 }