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Message-ID: <f38c1b3bf555f505e0856bf76c0d65c9e1d15c53.1675407169.git.daniel@makrotopia.org>
Date: Fri, 3 Feb 2023 07:02:01 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Russell King <linux@...linux.org.uk>,
Heiner Kallweit <hkallweit1@...il.com>,
Lorenzo Bianconi <lorenzo@...nel.org>,
Mark Lee <Mark-MC.Lee@...iatek.com>,
John Crispin <john@...ozen.org>, Felix Fietkau <nbd@....name>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Matthias Brugger <matthias.bgg@...il.com>,
DENG Qingfang <dqfext@...il.com>,
Landen Chao <Landen.Chao@...iatek.com>,
Sean Wang <sean.wang@...iatek.com>,
Paolo Abeni <pabeni@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
"David S. Miller" <davem@...emloft.net>,
Vladimir Oltean <olteanv@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>
Cc: Jianhui Zhao <zhaojh329@...il.com>,
Bjørn Mork <bjorn@...k.no>
Subject: [PATCH 4/9] net: ethernet: mtk_eth_soc: only write values if needed
Only restart auto-negotiation and write link timer if actually
necessary.
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
drivers/net/ethernet/mediatek/mtk_sgmii.c | 24 +++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_sgmii.c b/drivers/net/ethernet/mediatek/mtk_sgmii.c
index f3cf66a23e72..58b5f2f70a66 100644
--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
@@ -41,17 +41,13 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
unsigned int rgc3, sgm_mode, bmcr;
int advertise, link_timer;
- bool changed, use_an;
+ bool mode_changed = false, changed, use_an;
advertise = phylink_mii_c22_pcs_encode_advertisement(interface,
advertising);
if (advertise < 0)
return advertise;
- link_timer = phylink_get_link_timer_ns(interface);
- if (link_timer < 0)
- return link_timer;
-
/* Clearing IF_MODE_BIT0 switches the PCS to BASE-X mode, and
* we assume that fixes it's speed at bitrate = line rate (in
* other words, 1000Mbps or 2500Mbps).
@@ -77,8 +73,7 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
}
if (use_an) {
- /* FIXME: Do we need to set AN_RESTART here? */
- bmcr = SGMII_AN_RESTART | SGMII_AN_ENABLE;
+ bmcr = SGMII_AN_ENABLE;
} else {
bmcr = 0;
}
@@ -106,16 +101,21 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
regmap_update_bits(mpcs->regmap, mpcs->ana_rgc3,
RG_PHY_SPEED_3_125G, rgc3);
+ /* Setup the link timer and QPHY power up inside SGMIISYS */
+ link_timer = phylink_get_link_timer_ns(interface);
+ if (link_timer < 0)
+ return link_timer;
+
+ regmap_write(mpcs->regmap, SGMSYS_PCS_LINK_TIMER, link_timer / 2 / 8);
+
mpcs->interface = interface;
+ mode_changed = true;
}
/* Update the advertisement, noting whether it has changed */
regmap_update_bits_check(mpcs->regmap, SGMSYS_PCS_ADVERTISE,
SGMII_ADVERTISE, advertise, &changed);
- /* Setup the link timer and QPHY power up inside SGMIISYS */
- regmap_write(mpcs->regmap, SGMSYS_PCS_LINK_TIMER, link_timer / 2 / 8);
-
/* Update the sgmsys mode register */
regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
SGMII_REMOTE_FAULT_DIS | SGMII_SPEED_DUPLEX_AN |
@@ -123,7 +123,7 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
/* Update the BMCR */
regmap_update_bits(mpcs->regmap, SGMSYS_PCS_CONTROL_1,
- SGMII_AN_RESTART | SGMII_AN_ENABLE, bmcr);
+ SGMII_AN_ENABLE, bmcr);
/* Release PHYA power down state
* Only removing bit SGMII_PHYA_PWD isn't enough.
@@ -137,7 +137,7 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
usleep_range(50, 100);
regmap_write(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL, 0);
- return changed;
+ return changed || mode_changed;
}
static void mtk_pcs_restart_an(struct phylink_pcs *pcs)
--
2.39.1
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