[PATCH RFC net-next+ 1/9] net: stmmac: qcom-ethqos: convert to set_clk_tx_rate() method

["Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>]

Set the RGMII link clock using the set_clk_tx_rate() method rather than
coding it into the .fix_mac_speed() method. This simplifies ethqos's
ethqos_fix_mac_speed().

Tested-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../stmicro/stmmac/dwmac-qcom-ethqos.c        | 21 ++++++++++---------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 153f6abc77cd..ad5b5d950fff 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -103,7 +103,6 @@ struct qcom_ethqos {
 	void (*configure_func)(struct qcom_ethqos *ethqos,
 			       phy_interface_t interface, int speed);
 
-	unsigned int link_clk_rate;
 	struct clk *link_clk;
 	struct phy *serdes_phy;
 	int serdes_speed;
@@ -175,19 +174,20 @@ static void rgmii_dump(void *priv)
 		rgmii_readl(ethqos, EMAC_SYSTEM_LOW_POWER_DEBUG));
 }
 
-static void
-ethqos_update_link_clk(struct qcom_ethqos *ethqos, int speed)
+static int ethqos_set_clk_tx_rate(void *bsp_priv, struct clk *clk_tx_i,
+				  phy_interface_t interface, int speed)
 {
+	struct qcom_ethqos *ethqos = bsp_priv;
 	long rate;
 
-	if (!phy_interface_mode_is_rgmii(ethqos->phy_mode))
-		return;
+	if (!phy_interface_mode_is_rgmii(interface))
+		return 0;
 
 	rate = rgmii_clock(speed);
-	if (rate > 0)
-		ethqos->link_clk_rate = rate * 2;
+	if (rate < 0)
+		return rate;
 
-	clk_set_rate(ethqos->link_clk, ethqos->link_clk_rate);
+	return clk_set_rate(ethqos->link_clk, rate * 2);
 }
 
 static void
@@ -643,7 +643,6 @@ static void ethqos_fix_mac_speed(void *priv, phy_interface_t interface,
 {
 	struct qcom_ethqos *ethqos = priv;
 
-	ethqos_update_link_clk(ethqos, speed);
 	ethqos_configure(ethqos, interface, speed);
 }
 
@@ -821,12 +820,14 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
 				     "Failed to get serdes phy\n");
 
 	ethqos->serdes_speed = SPEED_1000;
-	ethqos_update_link_clk(ethqos, SPEED_1000);
+	ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
+			       SPEED_1000);
 
 	qcom_ethqos_set_sgmii_loopback(ethqos, true);
 	ethqos_set_func_clk_en(ethqos);
 
 	plat_dat->bsp_priv = ethqos;
+	plat_dat->set_clk_tx_rate = ethqos_set_clk_tx_rate;
 	plat_dat->fix_mac_speed = ethqos_fix_mac_speed;
 	plat_dat->dump_debug_regs = rgmii_dump;
 	plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config;
-- 
2.47.3