From patchwork Mon Feb 12 16:42:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 13553632 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (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 1E20E41233; Mon, 12 Feb 2024 16:41:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707756114; cv=none; b=fOpAKa3BCgGLiyNTKJB9Op0r4VgXEc4clsiAt1ybAYSwvBEZLxZq1zV3J3Y3HGw2C/JiNE4Vb9aKvEk49BbnibJI/SJPhvKXvjy6xVpULFTR5ZToVV/WE5+h4IRfPUMlLfpgABoYsFuWt57E2YKxbl8iaN+yB2CnQMISPAzJIPI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707756114; c=relaxed/simple; bh=5VzaDDVtiqqrz1Mwcj/UC006nFz4sJadQdlOvLwqDmU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=TCKmnroLpxNyJIaw+5KUPd7cxn8pZp2NVp2VolGB7ZhGOhYWjQGVPYDTTyd23vCMoykHMk24kcjpxlkJ8cXeF1TBdKQM/1yuq8tO0NQBVk/4vJv0m7A5qLTrB2ER2VjHO8yohxEqTEltj8ZBiQse1hxPoy7Aq47TcMTQRbKaBfA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=IlpWmGC2; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="IlpWmGC2" Received: by mail.gandi.net (Postfix) with ESMTPSA id 69CC140016; Mon, 12 Feb 2024 16:41:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1707756110; 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=nTYOICYJuQ5UIisiBLtAqZAhBd/IR4LXyUg6LvrTYmk=; b=IlpWmGC2hI41LV4Unr19gHLM+WaahQRaEz0tXoGkgwzwtht1RzKEEuq/FUTCBJIxXY5Nrs qtAzwWaPF+znQ6J/LRg487suGWmow1AcChOEc5CXTYIdKXsmEdnnAozg3g3koLrx/D5lag isWriRns8QHc19t+ipm1mzDPs39y3JOlM42bya6maxse3/RMRMnQ5funKrpwGLgEofWso8 /xUarWkGrmW6y0vLj40vTNxDyuF/gVB4wDNCOmhmuo9sIM3pyGaf93aSMvFZxEoMFTXnT2 UoEj9haG6frWihiREdDMfgksIB86F8mpq39jhh0lkIhOr34RofVQjlMKplUIpg== From: Romain Gantois Date: Mon, 12 Feb 2024 17:42:13 +0100 Subject: [PATCH net-next v3 6/7] net: phy: qcom: at803x: Avoid hibernating if MAC requires RX clock Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240212-rxc_bugfix-v3-6-e9f2eb6b3b05@bootlin.com> References: <20240212-rxc_bugfix-v3-0-e9f2eb6b3b05@bootlin.com> In-Reply-To: <20240212-rxc_bugfix-v3-0-e9f2eb6b3b05@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 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/qcom/at803x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/qcom/at803x.c b/drivers/net/phy/qcom/at803x.c index 4717c59d51d0..2a221b81cf37 100644 --- a/drivers/net/phy/qcom/at803x.c +++ b/drivers/net/phy/qcom/at803x.c @@ -426,7 +426,8 @@ 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,