From patchwork Thu Dec 12 14:46:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13905290 X-Patchwork-Delegate: kuba@kernel.org Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 CE2112135BE for ; Thu, 12 Dec 2024 14:46:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734014802; cv=none; b=qrxo6Uve2pe4ZncCkHhcQoOT37eqYvDsc+/lOPgf4i+xvueptclOCXH0nEkDl+nMTqu33qm9afrsJmx9vd40eKEATQCAbYOFfMd2N0gf368iaSYoIdboPojVWkz18t89RwnuTxmw3GASvLo+dMuMuUsZmKEqCff0X7IDswTJAuc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734014802; c=relaxed/simple; bh=0JNmwII+AXEDB/wRD09mZlRrDBgxLOrDU8oChJyFnr8=; h=In-Reply-To:References:From:To:Cc:Subject:MIME-Version: Content-Disposition:Content-Type:Message-Id:Date; b=W5HTGmJI2Z9mvk5tRZI41jpvnLkSg1DLMKz2yN/8fqR2adhu6Qhvf5HrF7Q8NftcsHPWvEZ97k3SBpgcE7cRdiDUdQXp3yK4iwn8LnEZI/f7A62ks7eXNi+QR0GeVNzGkL3644jU2dfH225kLM8GyGJ47Ju/QG11qgi9jHOuuZQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=RK8MOw17; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="RK8MOw17" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=kEa0qtUcwcsEkuhfjcn1NYOL/MklCkbZT0/uU4SI/f0=; b=RK8MOw17azpbJFsyr/NK7L1WZF jTXYubQ28EmbC4uDAFzD8GXsrsi6oFwiJI9Ouog7alDFNnqOFZRPkmAntpiwcuNqdgrJUfFqYApP1 3aotCRg/3Hi8UpS+jzH/RyLzZiwRNn5w+82vPXYgQg/ewAkYJa24wLJg9zeZOYPfwl+XCpgT1tWcA lCLJYiclz10M+Y+qjFC6jj40nxEEH8JzzReajR+na7SOJpPkOm4PCJBYL7mblJ6PzDK33vvEpaXPq LNqHEYeBMrMhD9kTmedRTMq3YJj1Klaxds+6GgT7SbdbxO4sHf/aMVtbs/zOlGS/lALiHz03aIVKW 1J/lBc9w==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:35776 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tLkSU-0005KQ-2C; Thu, 12 Dec 2024 14:46:30 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1tLkSS-006qfM-OH; Thu, 12 Dec 2024 14:46:28 +0000 In-Reply-To: References: From: "Russell King (Oracle)" To: Andrew Lunn , Heiner Kallweit Cc: Alexandre Torgue , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Jose Abreu , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, Maxime Coquelin , netdev@vger.kernel.org, Paolo Abeni Subject: [PATCH net-next 1/7] net: phy: add configuration of rx clock stop mode Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Thu, 12 Dec 2024 14:46:28 +0000 X-Patchwork-Delegate: kuba@kernel.org Add a function to allow configuration of the PCS's clock stop enable bit, used to configure whether the xMII receive clock can be stopped during LPI mode. Reviewed-by: Andrew Lunn Signed-off-by: Russell King (Oracle) --- drivers/net/phy/phy.c | 27 ++++++++++++++++++++++----- include/linux/phy.h | 1 + 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index e4b04cdaa995..a4b9fcc2503a 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1640,6 +1640,27 @@ void phy_mac_interrupt(struct phy_device *phydev) } EXPORT_SYMBOL(phy_mac_interrupt); +/** + * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI + * @phydev: target phy_device struct + * @clk_stop_enable: flag to indicate whether the clock can be stopped + * + * Configure whether the PHY can disable its receive clock during LPI mode, + * See IEEE 802.3 sections 22.2.2.2, 35.2.2.10, and 45.2.3.1.4. + * + * Returns: 0 or negative error. + */ +int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable) +{ + /* Configure the PHY to stop receiving xMII + * clock while it is signaling LPI. + */ + return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, + MDIO_PCS_CTRL1_CLKSTOP_EN, + clk_stop_enable ? MDIO_PCS_CTRL1_CLKSTOP_EN : 0); +} +EXPORT_SYMBOL_GPL(phy_eee_rx_clock_stop); + /** * phy_init_eee - init and check the EEE feature * @phydev: target phy_device struct @@ -1664,11 +1685,7 @@ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) return -EPROTONOSUPPORT; if (clk_stop_enable) - /* Configure the PHY to stop receiving xMII - * clock while it is signaling LPI. - */ - ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, - MDIO_PCS_CTRL1_CLKSTOP_EN); + ret = phy_eee_rx_clock_stop(phydev, true); return ret < 0 ? ret : 0; } diff --git a/include/linux/phy.h b/include/linux/phy.h index e597a32cc787..ba9d16fc69b8 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -2095,6 +2095,7 @@ int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask); int phy_unregister_fixup_for_id(const char *bus_id); int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask); +int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable); int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable); int phy_get_eee_err(struct phy_device *phydev); int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data);