linux-kernel - [PATCH net-next v4 4/7] net: dsa: mt7530: call port 6 setup from mt7530_mac

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Message-Id:
 <20240204-for-netnext-mt7530-improvements-2-v4-4-02bf0abaadb8@arinc9.com>
Date: Sun, 04 Feb 2024 19:34:22 +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>, 
 "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: [PATCH net-next v4 4/7] net: dsa: mt7530: call port 6 setup from
 mt7530_mac_config()

From: Arınç ÜNAL <arinc.unal@...nc9.com>

mt7530_pad_clk_setup() is called if port 6 is enabled. It used to do more
things than setting up port 6. That part was moved to more appropriate
locations, mt7530_setup() and mt7530_pll_setup().

Now that all it does is set up port 6, rename it to mt7530_setup_port6(),
and move it to a more appropriate location, under mt7530_mac_config().

Change mt7530_setup_port6() to void as there're no error cases.

Leave an empty mt7530_pad_clk_setup() to satisfy the pad_setup function
pointer.

This is the code path for setting up the ports before:

dsa_switch_ops :: phylink_mac_config() -> mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt753x_info :: mac_port_config() -> mt7530_mac_config()
      -> mt7530_setup_port5()
-> mt753x_pad_setup()
   -> mt753x_info :: pad_setup() -> mt7530_pad_clk_setup()

This is after:

dsa_switch_ops :: phylink_mac_config() -> mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt753x_info :: mac_port_config() -> mt7530_mac_config()
      -> mt7530_setup_port5()
      -> mt7530_setup_port6()

Reviewed-by: Vladimir Oltean <olteanv@...il.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
---
 drivers/net/dsa/mt7530.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 82e90da1e52b..18842c759b63 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -414,8 +414,8 @@ mt753x_preferred_default_local_cpu_port(struct dsa_switch *ds)
 }

 /* Setup port 6 interface mode and TRGMII TX circuit */
-static int
-mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
+static void
+mt7530_setup_port6(struct dsa_switch *ds, phy_interface_t interface)
 {
 	struct mt7530_priv *priv = ds->priv;
 	u32 ncpo1, ssc_delta, xtal;
@@ -465,7 +465,11 @@ mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)

 	/* Enable the MT7530 TRGMII clocks */
 	core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_TRGMIICK_EN);
+}

+static int
+mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
+{
 	return 0;
 }

@@ -2613,11 +2617,10 @@ mt7530_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 {
 	struct mt7530_priv *priv = ds->priv;

-	/* Only need to setup port5. */
-	if (port != 5)
-		return 0;
-
-	mt7530_setup_port5(priv->ds, interface);
+	if (port == 5) {
+		mt7530_setup_port5(priv->ds, interface);
+	else if (port == 6)
+		mt7530_setup_port6(priv->ds, interface);

 	return 0;
 }

-- 
2.40.1