netdev - [PATCH net-next v2 4/7] net: dsa: mt7530: move XTAL check to mt7530

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Message-Id:
 <20240130-for-netnext-mt7530-improvements-2-v2-4-ba06f5dd9eb0@arinc9.com>
Date: Tue, 30 Jan 2024 18:20:50 +0300
From: Arınç ÜNAL via B4 Relay
 <devnull+arinc.unal.arinc9.com@...nel.org>
To: Daniel Golle <daniel@...rotopia.org>, DENG Qingfang <dqfext@...il.com>, 
 Sean Wang <sean.wang@...iatek.com>, Andrew Lunn <andrew@...n.ch>, 
 Florian Fainelli <f.fainelli@...il.com>, 
 Vladimir Oltean <olteanv@...il.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Russell King <linux@...linux.org.uk>
Cc: mithat.guner@...ont.com, erkin.bozoglu@...ont.com, 
 Bartel Eerdekens <bartel.eerdekens@...stell8.be>, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, 
 Arınç ÜNAL <arinc.unal@...nc9.com>
Subject: [PATCH net-next v2 4/7] net: dsa: mt7530: move XTAL check to
 mt7530_setup()

From: Arınç ÜNAL <arinc.unal@...nc9.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(). Drop the unnecessary function printing.

Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
Reviewed-by: Vladimir Oltean <olteanv@...il.com>
---
 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 fdaf65b58b72..c4d492e29fdf 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;
@@ -2253,6 +2246,12 @@ 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