From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 3FD02249F5; Mon, 18 Mar 2024 07:47:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710748029; cv=none; b=cHBExE1ZDpdd2IrHwodci79WTQ+Zw9U5x5S9/QbpqQMT1I8TAJCyV50Jlnuk3mj68la9ffiQniD9WNtIMI6QRJ34dUAQp4ahIXpcbTAMNa0JHzi5GNnuhMzzardEBKqajtu6W5nhZAvn4mG4BHQoYFYE/E+tpfExEbLKjE+yItI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710748029; c=relaxed/simple; bh=ITdv2pn5D4CqC5MwIs/6m1cR8j1oHZxQEiexAzXrA4A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jHtTiLw44VwMriSsTV07S8v2DCNwxhMNI9wBdt7U5cl+GLskWKVnEgmK60IWLbVquwgjz/7qp0Yxqr7ZiKfttaDwU4P3kHh6x5Zv16oBefEVWpoglZDI+eoytmzT89s4Ey6kWWcnlweat8QPb4AWdwYktnW74nNioQLAUYm5abM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=o96972pk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="o96972pk" Received: by smtp.kernel.org (Postfix) with ESMTPS id D36FAC43390; Mon, 18 Mar 2024 07:47:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710748028; bh=ITdv2pn5D4CqC5MwIs/6m1cR8j1oHZxQEiexAzXrA4A=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=o96972pkM02lrb3svhmh8szqud514TtEC+38sYeWCJV2mtuzlFDo2wmYF797V8aHp 0i8dXkxLEHsVohyn46NBAgDMbKIMEANoajNUa/4X+BoeCAV5jMsIewUBqf4CdwlW/1 DFPC2B8g+iFXijPPURDbEpT2bBYkM6YV20w38vbLjuhAER/TGx7nBiHGOSvNYmkt/K cKpVqyQ3ov8G/CICVx0rAjl07SnuUULiOqR9lEA8PBLDMotEpSVv1y/0iaQcEz20YT 4Box+xyVoPMlT5YhVhE6+lrERzQEsNU2HqslCQD2Xo05Cn8UK5Xds57CAigYXv0xzI MAVRfy02OHHRw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C23BEC54E58; Mon, 18 Mar 2024 07:47:08 +0000 (UTC) From: =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= via B4 Relay Date: Mon, 18 Mar 2024 10:46:23 +0300 Subject: [PATCH 1/3] net: dsa: mt7530: fix enabling EEE on MT7531 switch on all boards Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: =?utf-8?q?=3C20240318-for-net-mt7530-fix-eee-for-mt7531-mt7988-v?= =?utf-8?q?1-1-3f17226344e8=40arinc9=2Ecom=3E?= References: =?utf-8?q?=3C20240318-for-net-mt7530-fix-eee-for-mt7531-mt7988-v?= =?utf-8?q?1-0-3f17226344e8=40arinc9=2Ecom=3E?= In-Reply-To: =?utf-8?q?=3C20240318-for-net-mt7530-fix-eee-for-mt7531-mt7988-?= =?utf-8?q?v1-0-3f17226344e8=40arinc9=2Ecom=3E?= To: Daniel Golle , DENG Qingfang , Sean Wang , Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthias Brugger , AngeloGioacchino Del Regno , =?utf-8?q?Ren=C3=A9_van_Dorst?= , Russell King , SkyLake Huang , Heiner Kallweit Cc: Bartel Eerdekens , mithat.guner@xeront.com, erkin.bozoglu@xeront.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, =?utf-8?q?Ar=C4=B1n=C3=A7_=C3=9CNAL?= X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1710748010; l=2411; i=arinc.unal@arinc9.com; s=arinc9-patatt; h=from:subject:message-id; bh=n6GBg3P0wOtkdb07AnyqLGs2kfHYSdBgEmtkDwKT6B8=; b=I2LmPwjiQmjqjwCuXvNT3y9Oy+74/n1FBJ1U/eAziVxdZ8NilIckTM/4zYde6k4K5Ari39+4m ZWJOVvadHrTCRVVdUIeNpsCFYJciXsPmNKj4nHEmpDy9B+jOl3NrFwy X-Developer-Key: i=arinc.unal@arinc9.com; a=ed25519; pk=VmvgMWwm73yVIrlyJYvGtnXkQJy9CvbaeEqPQO9Z4kA= X-Endpoint-Received: by B4 Relay for arinc.unal@arinc9.com/arinc9-patatt with auth_id=115 X-Original-From: =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= Reply-To: From: Arınç ÜNAL The commit 40b5d2f15c09 ("net: dsa: mt7530: Add support for EEE features") brought EEE support but did not enable EEE on MT7531 switch MACs. EEE is enabled on MT7531 switch MACs either by pulling the LAN2LED0 pin low on the board (bootstrapping), or unsetting the EEE_DIS bit on the trap register. There are existing boards that were not designed to pull the pin low. Therefore, unset the EEE_DIS bit on the trap register. Unlike MT7530, the modifiable trap register won't be populated identical to the trap status register after reset. Therefore, read from the trap status register, modify the bits, then write to the modifiable trap register. The disable EEE bit on the trap pertains to the LAN2LED0 pin which is usually used to control an LED. Once the bit is unset, the pin will be low. That will make the active low LED turn on. The pin is controlled by the switch PHY. It seems that the PHY controls the pin in the way that it inverts the pin state. That means depending on the wiring of the LED connected to LAN2LED0 on the board, the LED may be on without an active link. Fixes: 40b5d2f15c09 ("net: dsa: mt7530: Add support for EEE features") Signed-off-by: Arınç ÜNAL --- drivers/net/dsa/mt7530.c | 7 +++++++ drivers/net/dsa/mt7530.h | 1 + 2 files changed, 8 insertions(+) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index 678b51f9cea6..d741d03969eb 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -2458,6 +2458,13 @@ mt7531_setup(struct dsa_switch *ds) /* Reset the switch through internal reset */ mt7530_write(priv, MT7530_SYS_CTRL, SYS_CTRL_SW_RST | SYS_CTRL_REG_RST); + /* Allow modifying the trap and enable Energy-Efficient Ethernet (EEE). + */ + val = mt7530_read(priv, MT7531_HWTRAP); + val |= CHG_STRAP; + val &= ~EEE_DIS; + mt7530_write(priv, MT7530_MHWTRAP, val); + if (!priv->p5_sgmii) { mt7531_pll_setup(priv); } else { diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index a71166e0a7fc..509ed5362236 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -457,6 +457,7 @@ enum mt7531_clk_skew { #define XTAL_FSEL_M BIT(7) #define PHY_EN BIT(6) #define CHG_STRAP BIT(8) +#define EEE_DIS BIT(4) /* Register for hw trap modification */ #define MT7530_MHWTRAP 0x7804 -- 2.40.1