[RFC PATCH net-next 12/22] net: dsa: mt7530: move XTAL check to mt7530_setup()

[arinc9.unal at gmail.com]

From: Arınç ÜNAL <arinc.unal at arinc9.com>

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().

Tested-by: Arınç ÜNAL <arinc.unal at arinc9.com>
Signed-off-by: Arınç ÜNAL <arinc.unal at arinc9.com>
---
 drivers/net/dsa/mt7530.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index a1627e20675d..eaa36d41e8b9 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -408,13 +408,6 @@ mt7530_setup_port6(struct dsa_switch *ds, phy_interface_t interface)
 
 	xtal = mt7530_read(priv, MT7530_HWTRAP) & 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;
@@ -2136,7 +2129,7 @@ mt7530_setup(struct dsa_switch *ds)
 	struct mt7530_dummy_poll p;
 	phy_interface_t interface;
 	struct dsa_port *cpu_dp;
-	u32 id, val;
+	u32 id, val, xtal;
 	int ret, i;
 
 	/* The parent node of master netdev which holds the common system
@@ -2206,6 +2199,15 @@ mt7530_setup(struct dsa_switch *ds)
 		return -ENODEV;
 	}
 
+	xtal = mt7530_read(priv, MT7530_HWTRAP) & 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;
+	}
+
 	/* Reset the switch through internal reset */
 	mt7530_write(priv, MT7530_SYS_CTRL,
 		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |
-- 
2.37.2