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From: arinc9.unal@gmail.com
To: "Sean Wang" <sean.wang@mediatek.com>,
	"Landen Chao" <Landen.Chao@mediatek.com>,
	"DENG Qingfang" <dqfext@gmail.com>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Vladimir Oltean" <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	"AngeloGioacchino Del Regno"
	<angelogioacchino.delregno@collabora.com>,
	"Russell King" <rmk+kernel@armlinux.org.uk>,
	"René van Dorst" <opensource@vdorst.com>
Cc: "Arınç ÜNAL" <arinc.unal@arinc9.com>,
	erkin.bozoglu@xeront.com, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH net 2/2] net: dsa: mt7530: set PLL frequency only when trgmii is used
Date: Wed,  8 Mar 2023 01:03:28 +0300	[thread overview]
Message-ID: <20230307220328.11186-2-arinc.unal@arinc9.com> (raw)
In-Reply-To: <20230307220328.11186-1-arinc.unal@arinc9.com>

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

As my testing on the MCM MT7530 switch on MT7621 SoC shows, setting the PLL
frequency does not affect MII modes other than trgmii on port 5 and port 6.
So the assumption is that the operation here called "setting the PLL
frequency" actually sets the frequency of the TRGMII TX clock.

Make it so that it is set only when the trgmii mode is used.

Fixes: b8f126a8d543 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 drivers/net/dsa/mt7530.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index b1a79460df0e..961306c1ac14 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -430,8 +430,6 @@ mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
 	switch (interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		trgint = 0;
-		/* PLL frequency: 125MHz */
-		ncpo1 = 0x0c80;
 		break;
 	case PHY_INTERFACE_MODE_TRGMII:
 		trgint = 1;
-- 
2.37.2


WARNING: multiple messages have this Message-ID (diff)
From: arinc9.unal@gmail.com
To: "Sean Wang" <sean.wang@mediatek.com>,
	"Landen Chao" <Landen.Chao@mediatek.com>,
	"DENG Qingfang" <dqfext@gmail.com>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Vladimir Oltean" <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Matthias Brugger" <matthias.bgg@gmail.com>,
	"AngeloGioacchino Del Regno"
	<angelogioacchino.delregno@collabora.com>,
	"Russell King" <rmk+kernel@armlinux.org.uk>,
	"René van Dorst" <opensource@vdorst.com>
Cc: "Arınç ÜNAL" <arinc.unal@arinc9.com>,
	erkin.bozoglu@xeront.com, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH net 2/2] net: dsa: mt7530: set PLL frequency only when trgmii is used
Date: Wed,  8 Mar 2023 01:03:28 +0300	[thread overview]
Message-ID: <20230307220328.11186-2-arinc.unal@arinc9.com> (raw)
In-Reply-To: <20230307220328.11186-1-arinc.unal@arinc9.com>

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

As my testing on the MCM MT7530 switch on MT7621 SoC shows, setting the PLL
frequency does not affect MII modes other than trgmii on port 5 and port 6.
So the assumption is that the operation here called "setting the PLL
frequency" actually sets the frequency of the TRGMII TX clock.

Make it so that it is set only when the trgmii mode is used.

Fixes: b8f126a8d543 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 drivers/net/dsa/mt7530.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index b1a79460df0e..961306c1ac14 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -430,8 +430,6 @@ mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface)
 	switch (interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		trgint = 0;
-		/* PLL frequency: 125MHz */
-		ncpo1 = 0x0c80;
 		break;
 	case PHY_INTERFACE_MODE_TRGMII:
 		trgint = 1;
-- 
2.37.2


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2023-03-07 22:03 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-07 22:03 [PATCH net 1/2] net: dsa: mt7530: remove now incorrect comment regarding port 5 arinc9.unal
2023-03-07 22:03 ` arinc9.unal
2023-03-07 22:03 ` arinc9.unal [this message]
2023-03-07 22:03   ` [PATCH net 2/2] net: dsa: mt7530: set PLL frequency only when trgmii is used arinc9.unal
2023-03-07 23:33   ` Vladimir Oltean
2023-03-07 23:33     ` Vladimir Oltean
2023-03-08  8:50     ` Arınç ÜNAL
2023-03-08  8:50       ` Arınç ÜNAL
2023-03-07 22:06 ` [PATCH net 1/2] net: dsa: mt7530: remove now incorrect comment regarding port 5 Vladimir Oltean
2023-03-07 22:06   ` Vladimir Oltean
2023-03-07 22:21   ` Arınç ÜNAL
2023-03-07 22:21     ` Arınç ÜNAL

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