[RFC PATCH net-next 4/8] net: dsa: mt7530: move XTAL check to mt7530_setup()

Arınç ÜNAL arinc.unal at arinc9.com
Sat Jan 13 02:25:25 PST 2024


The crystal frequency concerns the switch core. The frequency should be
checked when the switch is being set up so the driver can reject the
unsupported hardware earlier and without requiring port 6 to be used.

Move it to mt7530_setup(). Drop the unnecessary function printing.

Signed-off-by: Arınç ÜNAL <arinc.unal at arinc9.com>
Reviewed-by: Andrew Lunn <andrew at lunn.ch>
---
 drivers/net/dsa/mt7530.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 823dc3ab15c8..d3e1e31ac8d0 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -422,13 +422,6 @@ mt7530_setup_port6(struct dsa_switch *ds, phy_interface_t interface)
 
 	xtal = mt7530_read(priv, MT7530_MHWTRAP) & HWTRAP_XTAL_MASK;
 
-	if (xtal == HWTRAP_XTAL_20MHZ) {
-		dev_err(priv->dev,
-			"%s: MT7530 with a 20MHz XTAL is not supported!\n",
-			__func__);
-		return -EINVAL;
-	}
-
 	switch (interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		trgint = 0;
@@ -2235,6 +2228,12 @@ mt7530_setup(struct dsa_switch *ds)
 		return -ENODEV;
 	}
 
+	if ((val & HWTRAP_XTAL_MASK) == HWTRAP_XTAL_20MHZ) {
+		dev_err(priv->dev,
+			"MT7530 with a 20MHz XTAL is not supported!\n");
+		return -EINVAL;
+	}
+
 	/* Reset the switch through internal reset */
 	mt7530_write(priv, MT7530_SYS_CTRL,
 		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
-- 
2.40.1




More information about the Linux-mediatek mailing list