From patchwork Tue Nov 26 12:52:57 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: 13885906 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 8B4EAD3B98D for ; Tue, 26 Nov 2024 13:03:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Date: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-Owner; bh=YrRBFjzD2crSgRpPTXiskXFXmSEIx5eNanvtUfjPMXI=; b=ox7otfsP8E3CQeB9awWLHzNY3m S7DJ043Gxrkhz7zD6KXjpvUcSwfKUCI2p36Bp09jXtusFlPEEm9Ej3QINO1hOHSU0R6ZJ5C/lvNYu b6ZJWDHk89gaMk72Sabyn6NFkIxPUvH5vBOPGnhLVU7B4Ch+tG/KHUX7kUlwXY4tkVKVg5PR8a4Fe U1Ehg7pvr3tpDq1qrigsROkQLIcHoA3Rremt8adwgbjZ295eLrmjJa4NC5LXGUqng92GWxzQA/tyO ULnObGC55HgTKZaW42ZWMcx8j0ulAay2e6u7MhLrbl9vHfZRtXSe5jndf3B16p4Pr11P0QGaG6071 44zKsSiQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tFvE5-0000000Ae5h-2A4V; Tue, 26 Nov 2024 13:03:33 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tFv3z-0000000Ac4Z-36yF for linux-arm-kernel@lists.infradead.org; Tue, 26 Nov 2024 12:53:08 +0000 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=YrRBFjzD2crSgRpPTXiskXFXmSEIx5eNanvtUfjPMXI=; b=uORnPyRXtwosRyXd/hSpFC+IHq a9Hg35iqjeSRwrAp5YbVtwfITI+BNuDvbprXzp9tyZCbWyhP15OlQAkf8T+Y3Jgc/BW+StHe4g2VQ 26caF9ly+mkxF9JuPiIDtm1EzTPzWRBWU3w2h5ZiypPenKtlnNSLyuD40CqK5QN4sc/XCNQrdG0g8 2kDSAlnzyre1GLEgahk2BUmIU35EdmzzQHF2AGS6IdXENgXqYDG7yP9TuJ3q4Lp63hUv5arnztHOZ 5lZXyJ0NBtzDPKB3orLCfVGRnm/C/+3LaT9sAmrX2oE9QFm2wKmpP0vY+zkCjRNIcO2N/GpytZBnD KjUFsSIw==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:39442 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 1tFv3q-0006tu-2u; Tue, 26 Nov 2024 12:52:59 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1tFv3p-005yi9-3F; Tue, 26 Nov 2024 12:52:57 +0000 In-Reply-To: References: From: "Russell King (Oracle)" To: Andrew Lunn , Heiner Kallweit Cc: Alexandre Torgue , Andrew Lunn , Bryan Whitehead , "David S. Miller" , Eric Dumazet , Florian Fainelli , Jakub Kicinski , Jose Abreu , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, Marcin Wojtas , Maxime Coquelin , netdev@vger.kernel.org, Oleksij Rempel , Paolo Abeni , UNGLinuxDriver@microchip.com Subject: [PATCH RFC net-next 09/23] net: phy: add configuration of rx clock stop mode MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Tue, 26 Nov 2024 12:52:57 +0000 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241126_045307_776833_246430A2 X-CRM114-Status: GOOD ( 12.03 ) 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 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. Signed-off-by: Russell King (Oracle) --- drivers/net/phy/phy.c | 25 ++++++++++++++++++++----- include/linux/phy.h | 1 + 2 files changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 21e0fc9a6f09..d0a9d807d48f 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1607,6 +1607,25 @@ int phy_eee_tx_clock_stop_capable(struct phy_device *phydev) } EXPORT_SYMBOL_GPL(phy_eee_tx_clock_stop_capable); +/** + * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI + * phydev: target phy_device struct + * + * Configure whether the PHY may 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 @@ -1631,11 +1650,7 @@ 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 d0491cdf54b6..467149b44a8e 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -2039,6 +2039,7 @@ 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_tx_clock_stop_capable(struct phy_device *phydev); +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);