From patchwork Wed Apr 27 21:44:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 566863 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65691C433FE for ; Wed, 27 Apr 2022 21:44:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234668AbiD0Vra (ORCPT ); Wed, 27 Apr 2022 17:47:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234208AbiD0Vr3 (ORCPT ); Wed, 27 Apr 2022 17:47:29 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [176.9.125.105]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 595EC90CF7; Wed, 27 Apr 2022 14:44:17 -0700 (PDT) Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 3DA102224D; Wed, 27 Apr 2022 23:44:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1651095855; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YO9EFQDucDo1VWldP4g0N6rBdXJCQA5jDizvOGknGSg=; b=JUUb83+Yyp3Y3KXHg8z1Wn8GMfDOK2Ualufpvo4Uju+P0uFoOXZ/3gx1e4ympLnck1RaTF FRLmbI4zDPmQCtJcLhWRDwUFB1R47IIOUabRRfTkR2OXzNBFevLh8f0YmAGuogdEfuUaGX HmZRo75j9KQho6ykTOU2WOmb+R5OQoQ= From: Michael Walle To: "David S . Miller" , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Andrew Lunn , Heiner Kallweit , Russell King Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Walle Subject: [PATCH net-next v1 1/3] dt-bindings: net: micrel: add coma-mode-gpios property Date: Wed, 27 Apr 2022 23:44:04 +0200 Message-Id: <20220427214406.1348872-2-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220427214406.1348872-1-michael@walle.cc> References: <20220427214406.1348872-1-michael@walle.cc> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The LAN8814 has a coma mode pin which is used to put the PHY into isolate and power-down mode. Usually strapped to be asserted by default. A GPIO is then used to take the PHY out of this mode. Signed-off-by: Michael Walle --- Documentation/devicetree/bindings/net/micrel.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt index 8d157f0295a5..a9ed691ffb03 100644 --- a/Documentation/devicetree/bindings/net/micrel.txt +++ b/Documentation/devicetree/bindings/net/micrel.txt @@ -45,3 +45,12 @@ Optional properties: In fiber mode, auto-negotiation is disabled and the PHY can only work in 100base-fx (full and half duplex) modes. + + - coma-mode-gpios: If present the given gpio will be deasserted when the + PHY is probed. + + Some PHYs have a COMA mode input pin which puts the PHY into + isolate and power-down mode. On some boards this input is connected + to a GPIO of the SoC. + + Supported on the LAN8814. From patchwork Wed Apr 27 21:44:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 566862 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8DE41C4332F for ; Wed, 27 Apr 2022 21:44:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234981AbiD0Vrb (ORCPT ); Wed, 27 Apr 2022 17:47:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234615AbiD0Vra (ORCPT ); Wed, 27 Apr 2022 17:47:30 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD29990CFD; Wed, 27 Apr 2022 14:44:17 -0700 (PDT) Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 107702224F; Wed, 27 Apr 2022 23:44:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1651095856; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HZBt1l3i9yMtBGGJUs1rxSD47mkigaWNIdw2JUlhznE=; b=lncMZBuyvUpQc6738g6D5pmTykds0mEYb1aXKMUS8DFQ3M0nPYnOQW9QY3Q4UpfqhcgWTA 9CuKjAvNwp0cucvxk55iH8FGBRPnQZ3pvoladE0nPmsZAvpkUP4Dq9Ej41jLz4XA0tHt9e i4R+A5oC3fv3xkXL7Qphl/znBbsXC1M= From: Michael Walle To: "David S . Miller" , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Andrew Lunn , Heiner Kallweit , Russell King Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Walle Subject: [PATCH net-next v1 3/3] net: phy: micrel: add coma mode GPIO Date: Wed, 27 Apr 2022 23:44:06 +0200 Message-Id: <20220427214406.1348872-4-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220427214406.1348872-1-michael@walle.cc> References: <20220427214406.1348872-1-michael@walle.cc> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The LAN8814 has a coma mode pin which puts the PHY into isolate and power-dowm mode. Unfortunately, the mode cannot be disabled by a register. Usually, the input pin has a pull-up and connected to a GPIO which can then be used to disable the mode. Try to get the GPIO and deassert it. Signed-off-by: Michael Walle --- drivers/net/phy/micrel.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index b981c5eaac33..685a0ab5453c 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -32,6 +32,7 @@ #include #include #include +#include /* Operation Mode Strap Override */ #define MII_KSZPHY_OMSO 0x16 @@ -2837,6 +2838,21 @@ static int lan8814_config_init(struct phy_device *phydev) return 0; } +static int lan8814_release_coma_mode(struct phy_device *phydev) +{ + struct gpio_desc *gpiod; + + gpiod = devm_gpiod_get_optional(&phydev->mdio.dev, "coma-mode", + GPIOD_OUT_HIGH_OPEN_DRAIN); + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); + + gpiod_set_consumer_name(gpiod, "LAN8814 coma mode"); + gpiod_set_value_cansleep(gpiod, 0); + + return 0; +} + static int lan8814_probe(struct phy_device *phydev) { struct kszphy_priv *priv; @@ -2859,6 +2875,10 @@ static int lan8814_probe(struct phy_device *phydev) addr, sizeof(struct lan8814_shared_priv)); if (phy_package_init_once(phydev)) { + err = lan8814_release_coma_mode(phydev); + if (err) + return err; + err = lan8814_ptp_probe_once(phydev); if (err) return err;