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[net-next,1/2] net: stmmac: thead: use rgmii_clock() for RGMII clock rate

Message ID E1tlTo8-004W3a-CO@rmk-PC.armlinux.org.uk (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series net: stmmac: thead: clean up clock rate setting | expand

Commit Message

Russell King (Oracle) Feb. 21, 2025, 2:15 p.m. UTC 
Switch to using rgmii_clock() to get the RGMII TXC rate, and calculate
the divisor from the parent clock rate and the rate indicated by
rgmii_clock().

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../net/ethernet/stmicro/stmmac/dwmac-thead.c    | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
index ddb1d8aba321..f16fa341aadb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
@@ -109,6 +109,7 @@  static void thead_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
 	struct plat_stmmacenet_data *plat;
 	struct thead_dwmac *dwmac = priv;
 	unsigned long rate;
+	long tx_rate;
 	u32 div, reg;
 
 	plat = dwmac->plat;
@@ -131,21 +132,14 @@  static void thead_dwmac_fix_speed(void *priv, int speed, unsigned int mode)
 
 		writel(0, dwmac->apb_base + GMAC_PLLCLK_DIV);
 
-		switch (speed) {
-		case SPEED_1000:
-			div = rate / GMAC_GMII_RGMII_RATE;
-			break;
-		case SPEED_100:
-			div = rate / GMAC_MII_RATE;
-			break;
-		case SPEED_10:
-			div = rate * 10 / GMAC_MII_RATE;
-			break;
-		default:
+		tx_rate = rgmii_clock(speed);
+		if (tx_rate < 0) {
 			dev_err(dwmac->dev, "invalid speed %d\n", speed);
 			return;
 		}
 
+		div = rate / tx_rate;
+
 		reg = FIELD_PREP(GMAC_PLLCLK_DIV_EN, 1) |
 		      FIELD_PREP(GMAC_PLLCLK_DIV_NUM, div);
 		writel(reg, dwmac->apb_base + GMAC_PLLCLK_DIV);