From mboxrd@z Thu Jan 1 00:00:00 1970 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 7C5DCC433EF for ; Mon, 31 Jan 2022 08:07:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=f3k6BWyLn2rz/xFCakUeahiscbLgK9WRS0Yr7xV+dQI=; b=Fg0lNYBabBXaUH 1UxZNMhxiuwQZg0ZSvL0E0XrfTPhY1EADWYfCLgtJM9YSANJZwqZp20bXeSyyZYeTcB0aRQ5lxmb1 z1+CRvb7TFUS0FbKwbdcOOzpIX5ObK3jAvSGPrIOueWnh7bxzd9prK+ENb57j471RykM/YCGJlkKb q3C8471J8xQ5We5uZXJPJ3v7MuwtuQXLm28LWpLtP8632pPRrtsVJ4QyVHRiQv+c/gEaKOQJpTcM8 gOWNYl2tAYyJ6psv3ni1ANHjiwfzVtoggbvRnqtLg3fhsb6j8C19vKzKRyQ2qEdqzZHHGV4XSy0Hb nKVVWwxj+AxH9heU+Ykw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nERhF-008PUR-TI; Mon, 31 Jan 2022 08:05:58 +0000 Received: from cpanel.siel.si ([46.19.9.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nERgx-008PNe-RK for linux-arm-kernel@lists.infradead.org; Mon, 31 Jan 2022 08:05:41 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=norik.com; s=default; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: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=U0T9NbNc+w7h8+N7scNAD/L+ZyEAGfspWZxqifa1x5s=; b=MXXw5Mi5vxCx+NqXiC8sao1eNC TzrkFiZk03eo++HCwM6Tym08OWbh/rnvoa0UdmZ7gvpSt5pa7AP+IEORM4UXEkuPvw0kplE4SmNGZ m06tKec/XwaFdqOig2n92QcJrd41qu+XNcNVUZusRCs2Ho7b4f9LUJetfMqSXTv2RVn6l+DwmENEO WeaJrIGDl4bfg92zzP8gnhOYZf9Vj25BbCujqcPGJV/pP8+e+IOqTfqZ67PxKS5SlIqxDyKK8iKiN +RLXZH7zgvifKs/sS//kgvEKQKa8ofTvbxJzo8dvt8LfK7lIjQXvk50oxUFMWZ0AmoG0w8LsUIh7a biEF9W2A==; Received: from [89.212.21.243] (port=42748 helo=localhost.localdomain) by cpanel.siel.si with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1nERgi-002KmK-VR; Mon, 31 Jan 2022 09:05:32 +0100 From: Andrej Picej To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: robh+dt@kernel.org, kernel@pengutronix.de, shawnguo@kernel.org, leoyang.li@nxp.com, krzysztof.kozlowski@canonical.com, festevam@gmail.com, linux@rempel-privat.de, arnd@arndb.de, linux-imx@nxp.com, y.bas@phytec.de Subject: [PATCH RESEND 3/4] ARM: dts: imx6ul: phycore: Change USB LDO voltage for usb compliance Date: Mon, 31 Jan 2022 09:05:25 +0100 Message-Id: <20220131080526.1171072-4-andrej.picej@norik.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220131080526.1171072-1-andrej.picej@norik.com> References: <20220131080526.1171072-1-andrej.picej@norik.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220131_000540_093362_99C634D2 X-CRM114-Status: UNSURE ( 7.30 ) X-CRM114-Notice: Please train this message. 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yunus Bas According to the NXP usb compliance reference, the USB data lines for Full/Low speed are connected to the ARM USB LDO, which is set to minimum-voltage = 2.6V and maximum-voltage = 3.4 V. When the regulator is deactivated, the data lines are defaulty driven with 2.6V, which is not USB Full-Speed compliant. To be compliant, we need to activate the USB LDO regulator and set it to the value of 3V, which is the specified value in the USB specification. Signed-off-by: Yunus Bas Signed-off-by: Andrej Picej --- arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi b/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi index 3cddc68917a0..2e03be3d43ec 100644 --- a/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi +++ b/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi @@ -83,6 +83,11 @@ eeprom@52 { }; }; +®_3p0 { + regulator-min-microvolt = <3000000>; + regulator-always-on; +}; + &snvs_poweroff { status = "okay"; }; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel