[Linux-stm32] [PATCH net-next] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

[Sarosh Hasan]

Updating link clock rate for different speeds is only needed when
using RGMII, as that mode requires changing clock speed when the link
speed changes. Let's restrict updating the link clock speed in
ethqos_update_link_clk() to just RGMII. Other modes such as SGMII
only need to enable the link clock (which is already done in probe).

Signed-off-by: Sarosh Hasan <quic_sarohasa at quicinc.com>
---
 .../stmicro/stmmac/dwmac-qcom-ethqos.c        | 26 ++++++++++---------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 31631e3f89d0..9cd144fb3005 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -169,21 +169,23 @@ static void rgmii_dump(void *priv)
 static void
 ethqos_update_link_clk(struct qcom_ethqos *ethqos, unsigned int speed)
 {
-	switch (speed) {
-	case SPEED_1000:
-		ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;
-		break;
+	if (phy_interface_mode_is_rgmii(ethqos->phy_mode)) {
+		switch (speed) {
+		case SPEED_1000:
+			ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;
+			break;
 
-	case SPEED_100:
-		ethqos->link_clk_rate =  RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
-		break;
+		case SPEED_100:
+			ethqos->link_clk_rate =  RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
+			break;
 
-	case SPEED_10:
-		ethqos->link_clk_rate =  RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
-		break;
-	}
+		case SPEED_10:
+			ethqos->link_clk_rate =  RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
+			break;
+		}
 
-	clk_set_rate(ethqos->link_clk, ethqos->link_clk_rate);
+		clk_set_rate(ethqos->link_clk, ethqos->link_clk_rate);
+	}
 }
 
 static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
-- 
2.17.1