netdev - [PATCH net-next 11/11] net: stmmac: thead: switch to use set_clk_tx

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Message-Id: <E1tna14-0052tT-S4@rmk-PC.armlinux.org.uk>
Date: Thu, 27 Feb 2025 09:17:14 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Drew Fustini <drew@...7.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Fu Wei <wefu@...hat.com>,
	Guo Ren <guoren@...nel.org>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 11/11] net: stmmac: thead: switch to use
 set_clk_tx_rate() hook

Switch from using the fix_mac_speed() hook to set_clk_tx_rate() to
manage the transmit clock.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/dwmac-thead.c  | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
index f9f2bd65959f..c72ee759aae5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
@@ -101,10 +101,11 @@ static int thead_dwmac_set_txclk_dir(struct plat_stmmacenet_data *plat)
 	return 0;
 }
 
-static void thead_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
+static int thead_set_clk_tx_rate(void *bsp_priv, struct clk *clk_tx_i,
+				 phy_interface_t interface, int speed)
 {
+	struct thead_dwmac *dwmac = bsp_priv;
 	struct plat_stmmacenet_data *plat;
-	struct thead_dwmac *dwmac = priv;
 	unsigned long rate;
 	long tx_rate;
 	u32 div, reg;
@@ -114,7 +115,7 @@ static void thead_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
 	switch (plat->mac_interface) {
 	/* For MII, rxc/txc is provided by phy */
 	case PHY_INTERFACE_MODE_MII:
-		return;
+		return 0;
 
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
@@ -127,23 +128,24 @@ static void thead_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
 		tx_rate = rgmii_clock(speed);
 		if (tx_rate < 0) {
 			dev_err(dwmac->dev, "invalid speed %d\n", speed);
-			return;
+			return tx_rate;
 		}
 
 		div = rate / tx_rate;
 		if (rate != tx_rate * div) {
 			dev_err(dwmac->dev, "invalid gmac rate %lu\n", rate);
-			return;
+			return -EINVAL;
 		}
 
 		reg = FIELD_PREP(GMAC_PLLCLK_DIV_EN, 1) |
 		      FIELD_PREP(GMAC_PLLCLK_DIV_NUM, div);
 		writel(reg, dwmac->apb_base + GMAC_PLLCLK_DIV);
-		break;
+		return 0;
+
 	default:
 		dev_err(dwmac->dev, "unsupported phy interface %d\n",
 			plat->mac_interface);
-		return;
+		return -EINVAL;
 	}
 }
 
@@ -235,7 +237,7 @@ static int thead_dwmac_probe(struct platform_device *pdev)
 	dwmac->plat = plat;
 	dwmac->apb_base = apb;
 	plat->bsp_priv = dwmac;
-	plat->fix_mac_speed = thead_dwmac_fix_speed;
+	plat->set_clk_tx_rate = thead_set_clk_tx_rate;
 	plat->init = thead_dwmac_init;
 
 	return devm_stmmac_pltfr_probe(pdev, plat, &stmmac_res);
-- 
2.30.2