From patchwork Tue Jan 30 09:28:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 13537091 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 333FDC46CD2 for ; Tue, 30 Jan 2024 09:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6oGkCr9/7hcxEZcubk0bA5HY/uErt25W1vbe79uE2M0=; b=fP6JzqeEH3srBL jzv8/azSy8Wu8nF0sULPq55v87Ya+9/LRmdVrtEhGPlRmmOU3OTtKmF9VqIuNUVrFGoYK0DyY9NEj L+V4DrMZA8KXkRlLCUAlVY6aL+3gJQ8zbGKPM1THAlN4y0I3nwK98hVjMiV2fi5BAz+Sje5BfwESP tIuzffeFm9kmBnRhJXrGsI1/VNhgNLNpO07wL4C6M34VdbbgkXkJG8jPwE3hq2vb0fCY1zUEUVv0b 70i0yJUPMYYWlEF6XHXrosiRUyUjsCSmm5ZG2yVaFTXk4RMtd37k6Mi50P1ZCkuC6kilIF6WE0g5s 0N7vty7ColvZuXUufbwQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUkQA-0000000Fvo9-3zyD; Tue, 30 Jan 2024 09:28:46 +0000 Received: from relay3-d.mail.gandi.net ([2001:4b98:dc4:8::223]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUkPl-0000000FvXI-0ddb for linux-arm-kernel@lists.infradead.org; Tue, 30 Jan 2024 09:28:23 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id E5E766000B; Tue, 30 Jan 2024 09:28:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1706606899; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=659Q4W8azKnN0NL3XJSqa+ypYYVmj/XL2tJEr9VDJX8=; b=afy97cw7XMyiosoW0oOMFKcGD1vXE5jENd2SXWG8oKO3NpkIEQOSVSBOOzO/jWMe104+BR 6/xIkeaFw9t+pJr9QVkYr7MurlxpWXNy/b4Zg8KbDHcw1Jgd6CEDzvj5Zkcx2J4pTtiOCu x4qcS7dcgQZzv9FuInCDmU9yQ8wnoh0RqTkyVnQy7KFu4LjnxN4m4kovNRLJeB7Z6RoRFS wvSaI702jrZjxPGHUihvoEGOHh40yhO29m9Nlb29CJkSf4fFh0ijHbivf3m8Y0ridGlkJb 61pwRlR1Iujg+mmMm4lNY1WG0dr8qWEaQV4cHJhxqE6QGrqrGq8Bevs0hYv//A== From: Romain Gantois Date: Tue, 30 Jan 2024 10:28:41 +0100 Subject: [PATCH net-next v2 6/7] net: phy: at803x: Avoid hibernating if MAC requires RX clock MIME-Version: 1.0 Message-Id: <20240130-rxc_bugfix-v2-6-5e6c3168e5f0@bootlin.com> References: <20240130-rxc_bugfix-v2-0-5e6c3168e5f0@bootlin.com> In-Reply-To: <20240130-rxc_bugfix-v2-0-5e6c3168e5f0@bootlin.com> To: Russell King , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexandre Torgue , Jose Abreu , Maxime Coquelin , =?utf-8?b?Q2zDqW1lbnQgTMOp?= =?utf-8?b?Z2Vy?= Cc: Maxime Chevallier , Miquel Raynal , Thomas Petazzoni , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Clark Wang , Romain Gantois X-Mailer: b4 0.12.4 X-GND-Sasl: romain.gantois@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240130_012821_487929_61A83068 X-CRM114-Status: GOOD ( 13.27 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Russell King Stmmac controllers connected to an at803x PHY cannot resume properly after suspend when WoL is enabled. This happens because the MAC requires an RX clock generated by the PHY to initialize its hardware properly. But the RX clock is cut when the PHY suspends and isn't brought up until the MAC driver resumes the phylink. Prevent the at803x PHY driver from going into suspend if the attached MAC driver always requires an RX clock signal. Reported-by: Clark Wang Link: https://lore.kernel.org/all/20230202081559.3553637-1-xiaoning.wang@nxp.com/ Signed-off-by: Russell King [rgantois: commit log] Signed-off-by: Romain Gantois --- drivers/net/phy/at803x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index 9c07a6cc6e67..5d8d6b89a162 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -895,7 +895,8 @@ static int at803x_hibernation_mode_config(struct phy_device *phydev) /* The default after hardware reset is hibernation mode enabled. After * software reset, the value is retained. */ - if (!(priv->flags & AT803X_DISABLE_HIBERNATION_MODE)) + if (!(priv->flags & AT803X_DISABLE_HIBERNATION_MODE) && + !(phydev->dev_flags & PHY_F_RXC_ALWAYS_ON)) return 0; return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_HIB_CTRL,