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Message-ID: <9de6402e09536d1c1a95d28615c1ed2aba223dbd.1675984550.git.daniel@makrotopia.org>
Date: Thu, 9 Feb 2023 23:31:13 +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 v3 06/12] net: ethernet: mtk_eth_soc: reset PCS state
Reset PCS state when changing interface mode.
Tested-by: Bjørn Mork <bjorn@...k.no>
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 4 ++++
drivers/net/ethernet/mediatek/mtk_sgmii.c | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 7014c02ba2d4..142def8629c8 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -548,6 +548,10 @@
#define SGMII_SEND_AN_ERROR_EN BIT(11)
#define SGMII_IF_MODE_MASK GENMASK(5, 1)
+/* Register to reset SGMII design */
+#define SGMII_RESERVED_0 0x34
+#define SGMII_SW_RESET BIT(0)
+
/* Register to set SGMII speed, ANA RG_ Control Signals III*/
#define SGMSYS_ANA_RG_CS3 0x2028
#define RG_PHY_SPEED_MASK (BIT(2) | BIT(3))
diff --git a/drivers/net/ethernet/mediatek/mtk_sgmii.c b/drivers/net/ethernet/mediatek/mtk_sgmii.c
index d7ffaaeaf9ab..d7e7352041a4 100644
--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
@@ -88,6 +88,10 @@ static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL,
SGMII_PHYA_PWD, SGMII_PHYA_PWD);
+ /* Reset SGMII PCS state */
+ regmap_update_bits(mpcs->regmap, SGMII_RESERVED_0,
+ SGMII_SW_RESET, SGMII_SW_RESET);
+
if (mpcs->flags & MTK_SGMII_FLAG_PN_SWAP)
regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_WRAP_CTRL,
SGMII_PN_SWAP_MASK,
--
2.39.1
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