From patchwork Wed Feb 21 13:04:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Gantois X-Patchwork-Id: 13565564 X-Patchwork-Delegate: kuba@kernel.org Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [217.70.183.196]) (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 C422C69967; Wed, 21 Feb 2024 13:04:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.196 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708520647; cv=none; b=Vf84XL0LSevTYlMlRf8Fyd0fGWhC1333Qv6OdfTTVo8YisjCqJ3ZjfuNl4w/P/sSD5SNwKnW0FDu3ktp1hH4cwJJLh7H+5CR6ykXIjtnE38dcTXp7PoH52CdoBWwSzvQJWRljui78QsrkfqiMvGocURz/wpzWuon5k0ExJfWpb0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708520647; c=relaxed/simple; bh=5VzaDDVtiqqrz1Mwcj/UC006nFz4sJadQdlOvLwqDmU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=HAPgJ9zhaOe2ZRhSR7exuGD9dnd7xpkt3PlCUUon1uPnxdSQaN4wU4nQMfmo37YkXvkoUOX1Y9JxBb0vSEWhX1F6bH8ulBox0grRLMCx+r4Ur8xAVLGfNSOYsXQwSAggIHwHFnEfvp2c+5K11iFLSg6+WNEA46+PpXzjQT58NWk= 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=IoHri9sx; arc=none smtp.client-ip=217.70.183.196 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="IoHri9sx" Received: by mail.gandi.net (Postfix) with ESMTPSA id 5CF2CE0018; Wed, 21 Feb 2024 13:04:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708520644; 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=IoHri9sxwMNAnWPqnA3xstbMYeRTaDORCIVdTDIdWSOOY46N5X0Q2/MueHepcQ6lBoZGsL tsgnufiv/ay44+kVWJvL3yNReTvtp9ZVowD0+F2qBUJXaa5Cc9uj+4SUMl0xwtMi03MhYe VjXtL55U7QvKlyMeDPdCKFzFV1ev3I2XX3pxgIVx/cCxkT7MDoyglrC8ZNlsEk0Vcz3qHB p8WFzaGRcjyijkCMn8G/JQVrWK5DsvTYhhyglASWI5OlVKPy/x+iG0xRB/EILqytIGz+lw 8+h4Qbe1M/ixyZHEARSTlE873B8Z3bLRvuMunsyjfyms2KcwtVAYXU56U2GwjQ== From: Romain Gantois Date: Wed, 21 Feb 2024 14:04:23 +0100 Subject: [PATCH net-next v4 6/7] net: phy: qcom: at803x: Avoid hibernating if MAC requires RX clock Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240221-rxc_bugfix-v4-6-4883ee1cc7b1@bootlin.com> References: <20240221-rxc_bugfix-v4-0-4883ee1cc7b1@bootlin.com> In-Reply-To: <20240221-rxc_bugfix-v4-0-4883ee1cc7b1@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-Patchwork-Delegate: kuba@kernel.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/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,