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 phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D9392C04A95 for ; Sat, 22 Oct 2022 13:44:36 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 9360784FCD; Sat, 22 Oct 2022 15:44:16 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="M4JCdz2w"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 4A89684EA1; Sat, 22 Oct 2022 15:44:09 +0200 (CEST) Received: from mail-il1-x129.google.com (mail-il1-x129.google.com [IPv6:2607:f8b0:4864:20::129]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 78D1984F72 for ; Sat, 22 Oct 2022 15:44:06 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=aford173@gmail.com Received: by mail-il1-x129.google.com with SMTP id 7so139288ilg.11 for ; Sat, 22 Oct 2022 06:44:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MhRuigttYQ3YSv11Zpp8WU0dyGzc+DsXjcBDBbfXQOQ=; b=M4JCdz2wQycuDtHXzQ9NBd7vlZgzuGH+OX+E4mTIwtWns5rUtRvJlpyrf77e++1EXG kD1gzkY6JHaoz8PEz/FyaZZLely2LrkdmUvNq9I+HDLr1ZWCbjiYEsoZxt417xIfbxfK +EM5gyWLgzHGznG9D+kinH2ybJ37P4U3obXjsTEdxJosJq6HFWSq0gLCnjqADgpuj8II HWJ8JoXpEqOVSeINecyJGHcGgtETbA1y4hsW7RVl56hqHrdbnZdZKdoyicNLdS/QeQ+S rs0efM9dg0lM1O9B+qHWjyPAviH6E6zHH1PwUqQcvqdHEPHhU0R39YlMwrXoH/+RM6oq XuFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MhRuigttYQ3YSv11Zpp8WU0dyGzc+DsXjcBDBbfXQOQ=; b=yg9t2sav2edHr/LAZeJP7rIg+Kv1B0iVZdKNLmKJd6UC1yIFr2/m6puAsN8Vwnm6o1 r6nk21SrO/6JNGl4nxBTmKNBMXfG5YVNOHqGdcj4n/Lfzdp2+q4oELSHEC6wo1REVK9y gIfbYuey6324RpC7FHzXwOHr0exM3DWkVNl4yZRzP5PlwiaBPwB1tM8HmDQGTHbD3jsB nzsmIdZpOUvwtn7zDC/Dic2Jd80pDR51+o2pJktCXdQh4/yjCUZwN+SmDJPP3+Ny5Zcj gyt9ia563i7K2fNF8bwiSaqtifhbXLfix84NavDu9wqpXewEyDa3Hi42/YGTTi8Npwft XGNQ== X-Gm-Message-State: ACrzQf2uOJ90xey42mU68AEwRSkRlO3r1pPB6khx5LnTIZi+vwZ8/QTf e8kPlGzxNKGmSKWLgalgxmTFvlBH1s8= X-Google-Smtp-Source: AMsMyM7efX3M/zhflUXiol5wDYOP6rgETG20uJCiKy62N9qLroWIwUclE2xsrwTqYx4OHRN/fV7k1w== X-Received: by 2002:a05:6e02:1be7:b0:2f9:b795:e298 with SMTP id y7-20020a056e021be700b002f9b795e298mr17982497ilv.117.1666446244624; Sat, 22 Oct 2022 06:44:04 -0700 (PDT) Received: from aford-IdeaCentre-A730.lan ([2601:447:d081:b229:bd3d:2f55:b616:5c0c]) by smtp.gmail.com with ESMTPSA id k6-20020a026606000000b00363b8ef4bc5sm5117978jac.71.2022.10.22.06.44.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 22 Oct 2022 06:44:04 -0700 (PDT) From: Adam Ford To: u-boot@lists.denx.de Cc: sbabic@denx.de, Adam Ford , Jaehoon Chung , Fabio Estevam , Peng Fan , Simon Glass Subject: [PATCH V2 4/4] imx: imx8mn-beacon: Fix out of spec voltage Date: Sat, 22 Oct 2022 08:43:44 -0500 Message-Id: <20221022134345.7613-4-aford173@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221022134345.7613-1-aford173@gmail.com> References: <20221022134345.7613-1-aford173@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.6 at phobos.denx.de X-Virus-Status: Clean The DDR is configured for LPDDR4 running at 1.6GHz which requires the voltage on the PMIC to rise a bit before initializing LPDDR4 or it will be running out of spec. Signed-off-by: Adam Ford diff --git a/board/beacon/imx8mn/spl.c b/board/beacon/imx8mn/spl.c index 029f71bc99..9acd916180 100644 --- a/board/beacon/imx8mn/spl.c +++ b/board/beacon/imx8mn/spl.c @@ -74,6 +74,38 @@ static iomux_v3_cfg_t const pwm_pads[] = { IMX8MN_PAD_GPIO1_IO01__PWM1_OUT | MUX_PAD_CTRL(PWM1_PAD_CTRL), }; +static int power_init_board(void) +{ + struct udevice *dev; + int ret; + + ret = pmic_get("pmic@4b", &dev); + if (ret == -ENODEV) { + puts("No pmic\n"); + return 0; + } + + if (ret != 0) + return ret; + + /* decrease RESET key long push time from the default 10s to 10ms */ + pmic_reg_write(dev, BD718XX_PWRONCONFIG1, 0x0); + + /* unlock the PMIC regs */ + pmic_reg_write(dev, BD718XX_REGLOCK, 0x1); + + /* increase VDD_SOC to typical value 0.85v before first DRAM access */ + pmic_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f); + + /* increase VDD_DRAM to 0.975v for 3Ghz DDR */ + pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83); + + /* lock the PMIC regs */ + pmic_reg_write(dev, BD718XX_REGLOCK, 0x11); + + return 0; +} + int board_early_init_f(void) { /* Claiming pwm pins prevents LCD flicker during startup*/ @@ -107,6 +139,9 @@ void board_init_f(ulong dummy) enable_tzc380(); + /* LPDDR4 at 1.6GHz requires a voltage adjustment on the PMIC */ + power_init_board(); + /* DDR initialization */ spl_dram_init(); -- 2.34.1