netdev - [PATCH net-next 6/6] net: stmmac: qos-eth: use dwmac_set_tx_clk

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Date: Mon, 11 Sep 2023 16:29:06 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	 Jose Abreu <joabreu@...opsys.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
	bpf@...r.kernel.org,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Emil Renner Berthing <kernel@...il.dk>,
	Eric Dumazet <edumazet@...gle.com>,
	Fabio Estevam <festevam@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	NXP Linux Team <linux-imx@....com>,
	Paolo Abeni <pabeni@...hat.com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Samin Guo <samin.guo@...rfivetech.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>
Subject: [PATCH net-next 6/6] net: stmmac: qos-eth: use
 dwmac_set_tx_clk_gmii()

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../stmicro/stmmac/dwmac-dwc-qos-eth.c        | 37 ++++++-------------
 1 file changed, 11 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 61ebf36da13d..a8fae37b9858 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -22,6 +22,7 @@
 #include <linux/stmmac.h>
 
 #include "stmmac_platform.h"
+#include "stmmac_plat_lib.h"
 #include "dwmac4.h"
 
 struct tegra_eqos {
@@ -181,32 +182,10 @@ static void dwc_qos_remove(struct platform_device *pdev)
 static void tegra_eqos_fix_speed(void *priv, unsigned int speed, unsigned int mode)
 {
 	struct tegra_eqos *eqos = priv;
-	unsigned long rate = 125000000;
-	bool needs_calibration = false;
 	u32 value;
 	int err;
 
-	switch (speed) {
-	case SPEED_1000:
-		needs_calibration = true;
-		rate = 125000000;
-		break;
-
-	case SPEED_100:
-		needs_calibration = true;
-		rate = 25000000;
-		break;
-
-	case SPEED_10:
-		rate = 2500000;
-		break;
-
-	default:
-		dev_err(eqos->dev, "invalid speed %u\n", speed);
-		break;
-	}
-
-	if (needs_calibration) {
+	if (speed == SPEED_1000 || speed == SPEED_100) {
 		/* calibrate */
 		value = readl(eqos->regs + SDMEMCOMPPADCTRL);
 		value |= SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD;
@@ -246,9 +225,15 @@ static void tegra_eqos_fix_speed(void *priv, unsigned int speed, unsigned int mo
 		writel(value, eqos->regs + AUTO_CAL_CONFIG);
 	}
 
-	err = clk_set_rate(eqos->clk_tx, rate);
-	if (err < 0)
-		dev_err(eqos->dev, "failed to set TX rate: %d\n", err);
+	err = dwmac_set_tx_clk_gmii(eqos->clk_tx, speed);
+	if (err == -ENOTSUPP) {
+		dev_err(eqos->dev, "invalid speed %dMbps\n", speed);
+		err = dwmac_set_tx_clk_gmii(eqos->clk_tx, SPEED_1000);
+	} else if (err) {
+		dev_err(eqos->dev,
+			"failed to set tx rate for speed %dMbps: %pe\n",
+			speed, ERR_PTR(err));
+	}
 }
 
 static int tegra_eqos_init(struct platform_device *pdev, void *priv)
-- 
2.30.2