From patchwork Sat Feb 16 09:45:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1043404 X-Patchwork-Delegate: promsoft@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Gmj4krSk"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 441lh64jM1z9s7T for ; Sat, 16 Feb 2019 20:48:54 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id 62ABFC21E2B; Sat, 16 Feb 2019 09:47:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id ABCD1C21E18; Sat, 16 Feb 2019 09:46:39 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 947BAC21EFD; Sat, 16 Feb 2019 09:46:17 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by lists.denx.de (Postfix) with ESMTPS id E70CDC21EBE for ; Sat, 16 Feb 2019 09:46:13 +0000 (UTC) Received: from localhost.localdomain (unknown [194.230.155.153]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8D32F222E0; Sat, 16 Feb 2019 09:46:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550310372; bh=vOT81rOfyrDz4nUdNwNFZW9Hk3FDWw7ygD5UF1m0ULI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Gmj4krSk0VlIpvtMPkQx/rXRNKo2VuAgAp1bsXB5SPlvieNhgVycd9LkXBL7RQotz PSzFRch+2/ZOwyTvO3+OXcQe0zuNB8aR+T8l/Hu7I6Pjw5HWdioXqq1nSwY4kiGqqd OP3iWipTOJCl7CCZ1/oMMotZXUblQNsZUB04Dy7U= From: Krzysztof Kozlowski To: Albert Aribaud , Jaehoon Chung , Lukasz Majewski , Krzysztof Kozlowski , Minkyu Kang , Simon Glass , Marek Szyprowski , u-boot@lists.denx.de Date: Sat, 16 Feb 2019 10:45:46 +0100 Message-Id: <20190216094548.911-8-krzk@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190216094548.911-1-krzk@kernel.org> References: <20190216094548.911-1-krzk@kernel.org> Subject: [U-Boot] [PATCH v3 7/9] power: regulator: s2mps11: Add enable delay X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" According to datasheet, the output on LDO regulators will start appearing after 10-15 us. Signed-off-by: Krzysztof Kozlowski --- drivers/power/regulator/s2mps11_regulator.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/power/regulator/s2mps11_regulator.c b/drivers/power/regulator/s2mps11_regulator.c index 723d27f67c9a..67d1f9689de3 100644 --- a/drivers/power/regulator/s2mps11_regulator.c +++ b/drivers/power/regulator/s2mps11_regulator.c @@ -551,7 +551,16 @@ static int ldo_get_enable(struct udevice *dev) static int ldo_set_enable(struct udevice *dev, bool enable) { - return s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable); + int ret; + + ret = s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable); + if (ret) + return ret; + + /* Wait the "enable delay" for voltage to start to rise */ + udelay(15); + + return 0; } static int ldo_get_mode(struct udevice *dev)