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charset="utf-8" Per the MII and RMII specifications, for the standard RMII mode, the REF_CLK is sourced from MAC to PHY or from an external source. For the standard MII mode, the RX_CLK and TX_CLK are both sourced by the PHY. But for TJA11xx PHYs, they support reverse mode, that is, for revRMII mode, the REF_CLK is output, and for revMII mode, the TX_CLK and RX_CLK are inputs to the PHY. Previously the "nxp,rmii-refclk-in" was added to indicate that in RMII mode, if this property present, REF_CLK is input to the PHY, otherwise it is output. This seems inappropriate now. Firstly, for the standard RMII mode, REF_CLK is originally input, and there is no need to add the "nxp,rmii-refclk-in" property to indicate that REF_CLK is input. Secondly, this property is not generic for TJA PHYs, because it cannot cover the settings of TX_CLK and RX_CLK in MII mode. Therefore, add new property "nxp,reverse-mode" to instead of the "nxp,rmii-refclk-in" property. Signed-off-by: Wei Fang --- .../devicetree/bindings/net/nxp,tja11xx.yaml | 21 +++++++------------ 1 file changed, 7 insertions(+), 14 deletions(-) diff --git a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml b/Docum= entation/devicetree/bindings/net/nxp,tja11xx.yaml index 85bfa45f5122..e8ab2cf8d4d4 100644 --- a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml +++ b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml @@ -32,21 +32,14 @@ patternProperties: description: The ID number for the child PHY. Should be +1 of parent PHY. =20 - nxp,rmii-refclk-in: + nxp,reverse-mode: type: boolean description: | - The REF_CLK is provided for both transmitted and received data - in RMII mode. This clock signal is provided by the PHY and is - typically derived from an external 25MHz crystal. Alternatively, - a 50MHz clock signal generated by an external oscillator can be - connected to pin REF_CLK. A third option is to connect a 25MHz - clock to pin CLK_IN_OUT. So, the REF_CLK should be configured - as input or output according to the actual circuit connection. - If present, indicates that the REF_CLK will be configured as - interface reference clock input when RMII mode enabled. - If not present, the REF_CLK will be configured as interface - reference clock output when RMII mode enabled. - Only supported on TJA1100 and TJA1101. + If present, the TJA11xx PHY will operate in "reversed" role mode. + If XMII_MODE is set to MII, the device operates in revMII mode + (TXCLK and RXCLK are input). + If XMII_MODE is set to RMII, the device operates in revRMII mode + (REF_CLK is output). =20 required: - reg @@ -61,7 +54,7 @@ examples: =20 tja1101_phy0: ethernet-phy@4 { reg =3D <0x4>; - nxp,rmii-refclk-in; + nxp,reverse-mode; }; }; - | --=20 2.34.1 From nobody Tue Dec 16 02:37:00 2025 Received: from AM0PR83CU005.outbound.protection.outlook.com (mail-westeuropeazon11010063.outbound.protection.outlook.com [52.101.69.63]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 49CFA176ABB; 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Received: from PAXPR04MB8510.eurprd04.prod.outlook.com (2603:10a6:102:211::7) by VI0PR04MB10805.eurprd04.prod.outlook.com (2603:10a6:800:25f::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7875.18; Thu, 15 Aug 2024 06:05:43 +0000 Received: from PAXPR04MB8510.eurprd04.prod.outlook.com ([fe80::a7c2:e2fa:8e04:40db]) by PAXPR04MB8510.eurprd04.prod.outlook.com ([fe80::a7c2:e2fa:8e04:40db%6]) with mapi id 15.20.7875.016; Thu, 15 Aug 2024 06:05:43 +0000 From: Wei Fang To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrew@lunn.ch, f.fainelli@gmail.com, hkallweit1@gmail.com, linux@armlinux.org.uk, andrei.botila@oss.nxp.com Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 2/3] net: phy: tja11xx: replace "nxp,rmii-refclk-in" with "nxp,reverse-mode" Date: Thu, 15 Aug 2024 13:51:25 +0800 Message-Id: <20240815055126.137437-3-wei.fang@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240815055126.137437-1-wei.fang@nxp.com> References: <20240815055126.137437-1-wei.fang@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SG2PR02CA0097.apcprd02.prod.outlook.com (2603:1096:4:92::13) To PAXPR04MB8510.eurprd04.prod.outlook.com (2603:10a6:102:211::7) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB8510:EE_|VI0PR04MB10805:EE_ X-MS-Office365-Filtering-Correlation-Id: c15cda80-85da-4171-d815-08dcbcf04c06 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|52116014|376014|7416014|366016|921020|38350700014; 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charset="utf-8" As the new property "nxp,reverse-mode" is added to instead of the "nxp,rmii-refclk-in" property, so replace the "nxp,rmii-refclk-in" property used in the driver with the "nxp,reverse-mode" property and make slight modifications. Signed-off-by: Wei Fang --- drivers/net/phy/nxp-tja11xx.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c index 2c263ae44b4f..a3721f91689b 100644 --- a/drivers/net/phy/nxp-tja11xx.c +++ b/drivers/net/phy/nxp-tja11xx.c @@ -78,8 +78,7 @@ #define MII_COMMCFG 27 #define MII_COMMCFG_AUTO_OP BIT(15) =20 -/* Configure REF_CLK as input in RMII mode */ -#define TJA110X_RMII_MODE_REFCLK_IN BIT(0) +#define TJA11XX_REVERSE_MODE BIT(0) =20 struct tja11xx_priv { char *hwmon_name; @@ -274,10 +273,10 @@ static int tja11xx_get_interface_mode(struct phy_devi= ce *phydev) mii_mode =3D MII_CFG1_REVMII_MODE; break; case PHY_INTERFACE_MODE_RMII: - if (priv->flags & TJA110X_RMII_MODE_REFCLK_IN) - mii_mode =3D MII_CFG1_RMII_MODE_REFCLK_IN; - else + if (priv->flags & TJA11XX_REVERSE_MODE) mii_mode =3D MII_CFG1_RMII_MODE_REFCLK_OUT; + else + mii_mode =3D MII_CFG1_RMII_MODE_REFCLK_IN; break; default: return -EINVAL; @@ -517,8 +516,8 @@ static int tja11xx_parse_dt(struct phy_device *phydev) if (!IS_ENABLED(CONFIG_OF_MDIO)) return 0; 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charset="utf-8" For TJA11xx PHYs, they have the capability to make REF_CLK as output in RMII mode, which is called revRMII mode in the data sheet, so add the revRMII mode support. Signed-off-by: Wei Fang --- drivers/net/phy/nxp-c45-tja11xx.c | 29 +++++++++++++++++++++++++++-- drivers/net/phy/nxp-c45-tja11xx.h | 1 + 2 files changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tj= a11xx.c index 5af5ade4fc64..571ecdbd49d9 100644 --- a/drivers/net/phy/nxp-c45-tja11xx.c +++ b/drivers/net/phy/nxp-c45-tja11xx.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -185,6 +186,8 @@ =20 #define NXP_C45_SKB_CB(skb) ((struct nxp_c45_skb_cb *)(skb)->cb) =20 +#define TJA11XX_REVERSE_MODE BIT(0) + struct nxp_c45_phy; =20 struct nxp_c45_skb_cb { @@ -1510,6 +1513,7 @@ static int nxp_c45_get_delays(struct phy_device *phyd= ev) =20 static int nxp_c45_set_phy_mode(struct phy_device *phydev) { + struct nxp_c45_phy *priv =3D phydev->priv; int ret; =20 ret =3D phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_ABILITIES); @@ -1561,8 +1565,13 @@ static int nxp_c45_set_phy_mode(struct phy_device *p= hydev) phydev_err(phydev, "rmii mode not supported\n"); return -EINVAL; } - phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG, - MII_BASIC_CONFIG_RMII); + + if (priv->flags & TJA11XX_REVERSE_MODE) + phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG, + MII_BASIC_CONFIG_RMII | MII_BASIC_CONFIG_REV); + else + phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_MII_BASIC_CONFIG, + MII_BASIC_CONFIG_RMII); break; case PHY_INTERFACE_MODE_SGMII: if (!(ret & SGMII_ABILITY)) { @@ -1623,6 +1632,20 @@ static int nxp_c45_get_features(struct phy_device *p= hydev) return genphy_c45_pma_read_abilities(phydev); } =20 +static int nxp_c45_parse_dt(struct phy_device *phydev) +{ + struct device_node *node =3D phydev->mdio.dev.of_node; + struct nxp_c45_phy *priv =3D phydev->priv; + + if (!IS_ENABLED(CONFIG_OF_MDIO)) + return 0; + + if (of_property_read_bool(node, "nxp,reverse-mode")) + priv->flags |=3D TJA11XX_REVERSE_MODE; + + return 0; +} + static int nxp_c45_probe(struct phy_device *phydev) { struct nxp_c45_phy *priv; @@ -1642,6 +1665,8 @@ static int nxp_c45_probe(struct phy_device *phydev) =20 phydev->priv =3D priv; =20 + nxp_c45_parse_dt(phydev); + mutex_init(&priv->ptp_lock); =20 phy_abilities =3D phy_read_mmd(phydev, MDIO_MMD_VEND1, diff --git a/drivers/net/phy/nxp-c45-tja11xx.h b/drivers/net/phy/nxp-c45-tj= a11xx.h index f364fca68f0b..8b5fc383752b 100644 --- a/drivers/net/phy/nxp-c45-tja11xx.h +++ b/drivers/net/phy/nxp-c45-tja11xx.h @@ -28,6 +28,7 @@ struct nxp_c45_phy { int extts_index; bool extts; struct nxp_c45_macsec *macsec; + u32 flags; }; =20 #if IS_ENABLED(CONFIG_MACSEC) --=20 2.34.1