From patchwork Thu Dec 5 16:43:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Petrous via B4 Relay X-Patchwork-Id: 13895797 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C4D4E77178 for ; Thu, 5 Dec 2024 16:53:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To: References:Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version: Subject:Date:From:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Mt0rCyXwBH75gm/hEp3dAw9YHLQ8vtgxRJ/+PYQudJI=; b=OPZ2gbTQyEmyBlU5SKfwgygQAN JZE5mAXRmquaJTuhUGZqj+fjuSFGmSy+Y9g2gOL1iM3hCbT+h41X9H92e64m8Cg4IZxRgr0qlCM1j 4Dzh9AH9w9PYKBQFvszzOpYC84P/wy+MQiZBIAj5Fem/J3LrfucOwVEIY0VG4QhqEbHj+3N72/Z02 p49d5KWlcX1WeQTbqY6Y+O//6cLkT/Pq4vOVjTF5TXEEZIEfJBGxFpVZzVsA/DXqXRMcTpFy/fIUb yKiz0EdTCRvsWQAK5A6RA73/pMP+aboya/UVehPvOPE9FmkrZntZq+sxqpNimW7RnLv/698+9X+jD AF2ot70g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tJF5u-0000000GpiR-0Jn5; Thu, 05 Dec 2024 16:52:50 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tJEww-0000000Gn6r-21Ru for linux-arm-kernel@lists.infradead.org; Thu, 05 Dec 2024 16:43:37 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 1E4845C6720; Thu, 5 Dec 2024 16:42:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 03FCDC4CEED; Thu, 5 Dec 2024 16:43:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733417012; bh=qT18XtbzllFJO6K/EGbpIUkVOz74iHPo6IUZe3P4fQc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=GB8zKrNGGftjiDTmD1Tl/rUYuN6P3xev7DqIfBj/0kmKu4jWc26BiICyXkbxO/hdI 13qaIvyVa0g3hzsMs+bQbrVjU2c+0ZAY8BvO9HulrPK1ReQZqEidXnhTPb7j+TdXYG 5NqyuuPR7ywggaHsFr9+C9q79bTQxfSDEozo9az5e6jhWJbz4Z3xyi5Sdf75QoReR8 vhCigSKXXTImIBY8zCaBPp862A6SkwMjgNruEVN19gYpQq/TG/l4DxuBqIL3iMgu93 xa7hm7v9KIsjFnVEgvACrCJbHuqYUm/BE1ct+TJmyYxmhmKgFdIq/vCmPQpwbJ+7rp hTTB29wIuN/Cw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E98C5E7716D; Thu, 5 Dec 2024 16:43:31 +0000 (UTC) From: Jan Petrous via B4 Relay Date: Thu, 05 Dec 2024 17:43:01 +0100 Subject: [PATCH net-next v8 04/15] net: phy: Add helper for mapping RGMII link speed to clock rate MIME-Version: 1.0 Message-Id: <20241205-upstream_s32cc_gmac-v8-4-ec1d180df815@oss.nxp.com> References: <20241205-upstream_s32cc_gmac-v8-0-ec1d180df815@oss.nxp.com> In-Reply-To: <20241205-upstream_s32cc_gmac-v8-0-ec1d180df815@oss.nxp.com> To: Maxime Coquelin , Alexandre Torgue , Jose Abreu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vinod Koul , Richard Cochran , Andrew Lunn , Heiner Kallweit , Russell King , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Emil Renner Berthing , Minda Chen , Nicolas Ferre , Claudiu Beznea , Iyappan Subramanian , Keyur Chudgar , Quan Nguyen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Giuseppe Cavallaro , Andrew Lunn Cc: linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, imx@lists.linux.dev, devicetree@vger.kernel.org, NXP S32 Linux Team , 0x1207@gmail.com, fancer.lancer@gmail.com, "Jan Petrous (OSS)" , "Russell King (Oracle)" X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733417009; l=1509; i=jan.petrous@oss.nxp.com; s=20240922; h=from:subject:message-id; bh=3exSjKEVuojsQxBeLN9HdAigOEc+2YUOvrl9BYstKAs=; b=mNFYLfQv105ROGOwlEnxB5fCA+2r6XhmI/q3hg5Ago/2NAp0TTsQCa8sMxSHZlBt7CzuAmfoG aMbYb0d/YdYB7qfGFkN26+mFOUm0y+OMiVWKG0DWo/JUd8XpPN+AVPV X-Developer-Key: i=jan.petrous@oss.nxp.com; a=ed25519; pk=Ke3wwK7rb2Me9UQRf6vR8AsfJZfhTyoDaxkUCqmSWYY= X-Endpoint-Received: by B4 Relay for jan.petrous@oss.nxp.com/20240922 with auth_id=217 X-Original-From: "Jan Petrous (OSS)" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241205_084334_654303_B88E9E3B X-CRM114-Status: GOOD ( 10.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: jan.petrous@oss.nxp.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Jan Petrous (OSS)" The RGMII interface supports three data rates: 10/100 Mbps and 1 Gbps. These speeds correspond to clock frequencies of 2.5/25 MHz and 125 MHz, respectively. Many Ethernet drivers, including glues in stmmac, follow a similar pattern of converting RGMII speed to clock frequency. To simplify code, define the helper rgmii_clock(speed) to convert connection speed to clock frequency. Suggested-by: Russell King (Oracle) Reviewed-by: Andrew Lunn Reviewed-by: Russell King (Oracle) Signed-off-by: Jan Petrous (OSS) --- include/linux/phy.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/phy.h b/include/linux/phy.h index 563c46205685..a746f056ed57 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -298,6 +298,29 @@ static inline const char *phy_modes(phy_interface_t interface) } } +/** + * rgmii_clock - map link speed to the clock rate + * @speed: link speed value + * + * Description: maps RGMII supported link speeds + * into the clock rates. + * + * Returns: clock rate or negative errno + */ +static inline long rgmii_clock(int speed) +{ + switch (speed) { + case SPEED_10: + return 2500000; + case SPEED_100: + return 25000000; + case SPEED_1000: + return 125000000; + default: + return -EINVAL; + } +} + #define PHY_INIT_TIMEOUT 100000 #define PHY_FORCE_TIMEOUT 10