From nobody Thu Apr 2 17:16:04 2026 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) (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 A11152F5A34; Fri, 27 Mar 2026 05:41:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.153.233 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774590064; cv=none; b=RQXZ/0iWhl5U5udmtHkrovF9ijoaShAfqpHjNDJ0qUFwcKc3UQ7xi7GMXVu0DLfol8E3FVXMBsdX6ijjbyQoDwBEgsDYFtaP33GDI59ivlqDc4KDlp7fO3XODc7yMIqakggWnJTxWwLjl/UCdBoNLxwSZVhrVGhbXKuV5jRTzy0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774590064; c=relaxed/simple; bh=Wt9YhJI8kBSjUiYX1icTLa7+OpFoL79DcCu7XRGhBPs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=D1kf6IYWI/1e8jU5Uf6bRzx4EvHef63y975ZQaeyqofroUg9E3zT/2Pcad8uQ/+p21RLNUYnVs6FieStT42nwdoFOY1pDd8jvYniN3G9Ipk6Df8rZEN3feVYkM4Ttjl12eRodOxuee3/1/w1HG5S9BhwJ60qZYZziq9CGWRe02w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=wWCzNY+1; arc=none smtp.client-ip=68.232.153.233 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="wWCzNY+1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1774590063; x=1806126063; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Wt9YhJI8kBSjUiYX1icTLa7+OpFoL79DcCu7XRGhBPs=; b=wWCzNY+14XR2YnynvV19l2MbRjKopaFqzGsYHOzPWd/EuRpbdOdaIyl0 dYdPIpRMsoWR51xq9U/Wk6qUpKXxurnjrXGtXLFtzR+lhSCqknhwXnFad LEczlJAvXJFdrJyuJd3+h6NgeHSdPHTKzh/0fiU/SOQycXyEeIF2JaWon +Vgn8Cp/hKOJRImlu8vfCX/M7m4xdcad6x/glZR5fJO4iYfaWPQwARhs8 P1csrfMWAdkEhzQ49JCcWik4Qjpr9zRY3oczUsiv/9PA8fupBfIWJ016m pTqVnYR8f5f4IM/cbKhT98n9H1F2hA7Skw7MwsxEB0QVAUhDiuGiMcx62 g==; X-CSE-ConnectionGUID: xm++kwl8RKeu0DdLYypW9Q== X-CSE-MsgGUID: +oSuLAL+T5m7uVLKJF+I0Q== X-IronPort-AV: E=Sophos;i="6.23,143,1770620400"; d="scan'208";a="63044333" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa1.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Mar 2026 22:40:55 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.87.152) by chn-vm-ex1.mchp-main.com (10.10.87.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.35; Thu, 26 Mar 2026 22:40:36 -0700 Received: from che-ld-unglab06.microchip.com (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Thu, 26 Mar 2026 22:40:31 -0700 From: Thangaraj Samynathan To: , , , , , , , , , CC: , Subject: [PATCH net-next 1/2] net: lan743x: add RMII strap status detection for PCI11x1x Date: Fri, 27 Mar 2026 11:10:07 +0530 Message-ID: <20260327054008.79294-2-thangaraj.s@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260327054008.79294-1-thangaraj.s@microchip.com> References: <20260327054008.79294-1-thangaraj.s@microchip.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend pci11x1x_strap_get_status() to read the RMII strap bits from the STRAP_READ register. The is_rmii_en flag is initialized to false and updated based on the hardware strap only if SGMII is not already enabled. This ensures correct interface identification during adapter initialization. Signed-off-by: Thangaraj Samynathan --- drivers/net/ethernet/microchip/lan743x_main.c | 7 +++++++ drivers/net/ethernet/microchip/lan743x_main.h | 3 +++ 2 files changed, 10 insertions(+) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/et= hernet/microchip/lan743x_main.c index b4cabde6625a..b7b1584d867d 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -42,6 +42,7 @@ static void pci11x1x_strap_get_status(struct lan743x_adap= ter *adapter) u32 strap; int ret; =20 + adapter->is_rmii_en =3D false; /* Timeout =3D 100 (i.e. 1 sec (10 msce * 100)) */ ret =3D lan743x_hs_syslock_acquire(adapter, 100); if (ret < 0) { @@ -73,6 +74,12 @@ static void pci11x1x_strap_get_status(struct lan743x_ada= pter *adapter) adapter->is_sgmii_en =3D false; } } + + if (!adapter->is_sgmii_en && strap & STRAP_READ_USE_RMII_EN_) { + if (strap & STRAP_READ_RMII_EN_) + adapter->is_rmii_en =3D true; + } + netif_dbg(adapter, drv, adapter->netdev, "SGMII I/F %sable\n", adapter->is_sgmii_en ? "En" : "Dis"); } diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/et= hernet/microchip/lan743x_main.h index 160d94a7cee6..1d7d37456553 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -36,7 +36,9 @@ #define FPGA_SGMII_OP BIT(24) =20 #define STRAP_READ (0x0C) +#define STRAP_READ_USE_RMII_EN_ BIT(23) #define STRAP_READ_USE_SGMII_EN_ BIT(22) +#define STRAP_READ_RMII_EN_ BIT(7) #define STRAP_READ_SGMII_EN_ BIT(6) #define STRAP_READ_SGMII_REFCLK_ BIT(5) #define STRAP_READ_SGMII_2_5G_ BIT(4) @@ -1071,6 +1073,7 @@ struct lan743x_adapter { struct lan743x_rx rx[LAN743X_USED_RX_CHANNELS]; bool is_pci11x1x; bool is_sgmii_en; + bool is_rmii_en; /* protect ethernet syslock */ spinlock_t eth_syslock_spinlock; bool eth_syslock_en; --=20 2.34.1 From nobody Thu Apr 2 17:16:04 2026 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 DC3FE2C032E; Fri, 27 Mar 2026 05:41:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774590073; cv=none; b=UFE9tebbtSNgzMjxwcBEKaYxRRf+ZROt7P+aLEM1sOsZ+8u3NQGG/7io9lXz3RMxTBWfih92FsHPQcDJXbdsJNjZ3Wuoo6E79FEPP7iVaeS7+HbTlSX3XqA0gG31lq8uQJNtlSnzoElhc8RLKPYm3WxjTEICmGpbhXzH4RaRtcY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774590073; c=relaxed/simple; bh=ZHZxoddQJjzcgvbwtL6scun+BXya5huaDuqGKWA6YR8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=bxYqsxJ85800mH5JbLKZ82Bb8FNztV59XzGcgVRIxk9GIIuQJuVdbf10M27pLhmRpOo88SE+bL1uUPWAsb4adurKxy3sSdhBYNsFDKPuV5ZYBOL5pfJZLyGwv4pihV5fnwwMaWoNuhTe2VNvafySFxi4Jaq/JzIG4QyPN0aLDKA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=vkap9/eu; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="vkap9/eu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1774590071; x=1806126071; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZHZxoddQJjzcgvbwtL6scun+BXya5huaDuqGKWA6YR8=; b=vkap9/euxHWYCIO1jyV5LOIBPB6dplII1E48DKbSX+tCH69IBoIHgP6c TKiUA6r0IDqmDUb+DLDrkOpYOdD2Iqub+yC+HcOVGiq8hDOK2Nh/I/TOr C/42H0LTDKzGTFHY+A/ZGAeD6HgTOABc9Ku5UyIB9nq+PHEd2xhHUQRwQ CLmZCvkK+SKcThD0EJae8DMsEymGLhwoigJ17ySbT+SvY7n1QbW45mE0f zaUEUrO5mRuNjnAJ26kNCg71f+JLDC0D+YYEzBuDX/CCpYAjHCW5Ql2Ua aJhXHu6FpBaUnIU4mjrA6hwgyamooZ9by5GhZ/q1LYPK2pwr/osZkXlWc A==; X-CSE-ConnectionGUID: gjosScOBTwOVchRgA2ENAw== X-CSE-MsgGUID: 1vzhvfyvS+arE+EvchGOFw== X-IronPort-AV: E=Sophos;i="6.23,143,1770620400"; d="scan'208";a="54548843" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 26 Mar 2026 22:41:10 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.58; Thu, 26 Mar 2026 22:40:41 -0700 Received: from che-ld-unglab06.microchip.com (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Thu, 26 Mar 2026 22:40:37 -0700 From: Thangaraj Samynathan To: , , , , , , , , , CC: , Subject: [PATCH net-next 2/2] net: lan743x: add support for RMII interface Date: Fri, 27 Mar 2026 11:10:08 +0530 Message-ID: <20260327054008.79294-3-thangaraj.s@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260327054008.79294-1-thangaraj.s@microchip.com> References: <20260327054008.79294-1-thangaraj.s@microchip.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Enable RMII interface in the lan743x driver for PHY and MAC configuration. - Select RMII interface in lan743x_phy_interface_select(). - Update phylink supported_interfaces and MAC capabilities. - Enable RMII via RMII_CTL in lan743x_hardware_init(). - Define RMII_CTL register and enable bit in lan743x_main.h. Signed-off-by: Thangaraj Samynathan Reviewed-by: Maxime Chevallier =09 --- drivers/net/ethernet/microchip/lan743x_main.c | 18 ++++++++++++++++++ drivers/net/ethernet/microchip/lan743x_main.h | 3 +++ 2 files changed, 21 insertions(+) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/et= hernet/microchip/lan743x_main.c index b7b1584d867d..86d35810460f 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -1370,6 +1370,8 @@ static void lan743x_phy_interface_select(struct lan74= 3x_adapter *adapter) =20 if (adapter->is_pci11x1x && adapter->is_sgmii_en) adapter->phy_interface =3D PHY_INTERFACE_MODE_SGMII; + else if (adapter->is_pci11x1x && adapter->is_rmii_en) + adapter->phy_interface =3D PHY_INTERFACE_MODE_RMII; else if (id_rev =3D=3D ID_REV_ID_LAN7430_) adapter->phy_interface =3D PHY_INTERFACE_MODE_GMII; else if ((id_rev =3D=3D ID_REV_ID_LAN7431_) && (data & MAC_CR_MII_EN_)) @@ -3158,6 +3160,13 @@ static int lan743x_phylink_create(struct lan743x_ada= pter *adapter) __set_bit(PHY_INTERFACE_MODE_MII, adapter->phylink_config.supported_interfaces); break; + case PHY_INTERFACE_MODE_RMII: + __set_bit(PHY_INTERFACE_MODE_RMII, + adapter->phylink_config.supported_interfaces); + adapter->phylink_config.mac_capabilities &=3D ~MAC_1000FD; + adapter->phylink_config.lpi_capabilities =3D 0; + break; + default: phy_interface_set_rgmii(adapter->phylink_config.supported_interfaces); } @@ -3165,6 +3174,9 @@ static int lan743x_phylink_create(struct lan743x_adap= ter *adapter) memcpy(adapter->phylink_config.lpi_interfaces, adapter->phylink_config.supported_interfaces, sizeof(adapter->phylink_config.lpi_interfaces)); + if (adapter->phy_interface =3D=3D PHY_INTERFACE_MODE_RMII) + __clear_bit(PHY_INTERFACE_MODE_RMII, + adapter->phylink_config.lpi_interfaces); =20 pl =3D phylink_create(&adapter->phylink_config, NULL, adapter->phy_interface, &lan743x_phylink_mac_ops); @@ -3509,6 +3521,7 @@ static int lan743x_hardware_init(struct lan743x_adapt= er *adapter, { struct lan743x_tx *tx; u32 sgmii_ctl; + u32 rmii_ctl; int index; int ret; =20 @@ -3530,6 +3543,11 @@ static int lan743x_hardware_init(struct lan743x_adap= ter *adapter, sgmii_ctl |=3D SGMII_CTL_SGMII_POWER_DN_; } lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl); + if (adapter->is_rmii_en) { + rmii_ctl =3D lan743x_csr_read(adapter, RMII_CTL); + rmii_ctl |=3D RMII_CTL_RMII_ENABLE_; + lan743x_csr_write(adapter, RMII_CTL, rmii_ctl); + } } else { adapter->max_tx_channels =3D LAN743X_MAX_TX_CHANNELS; adapter->used_tx_channels =3D LAN743X_USED_TX_CHANNELS; diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/et= hernet/microchip/lan743x_main.h index 1d7d37456553..03f3727ed8f7 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -324,6 +324,9 @@ #define MAC_WUCSR2_IPV6_TCPSYN_RCD_ BIT(5) #define MAC_WUCSR2_IPV4_TCPSYN_RCD_ BIT(4) =20 +#define RMII_CTL (0x710) +#define RMII_CTL_RMII_ENABLE_ BIT(0) + #define SGMII_ACC (0x720) #define SGMII_ACC_SGMII_BZY_ BIT(31) #define SGMII_ACC_SGMII_WR_ BIT(30) --=20 2.34.1