From patchwork Wed Mar 6 18:37:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1052462 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="QK2UPDV+"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 44F2fW3N63z9s7T for ; Thu, 7 Mar 2019 05:41:39 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id 1E3D2C21E13; Wed, 6 Mar 2019 18:39:02 +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 9E320C21DFA; Wed, 6 Mar 2019 18:38:30 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id BC512C21DFA; Wed, 6 Mar 2019 18:38:28 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by lists.denx.de (Postfix) with ESMTPS id 93060C21E16 for ; Wed, 6 Mar 2019 18:38:24 +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 6CCAE213A2; Wed, 6 Mar 2019 18:38:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551897503; bh=7r/tQfKPIp7SLL2NpJ4XoIdsIcObgLRPR2Qgx27/1iI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=QK2UPDV+ceiPNjT0KUEnSJfaWnwt4lLUV8Bg5lI5E1VYGzKYWzPyG7J3mousE6qZG fuGkz2SWFhvHI2VZLU44E36UkcvtKUwcKlk/nJync4KdzGtYWtXfVyNhyDpFIYLFAm jA6OJrFnIMQdIQUFbXbLE0YzO4eYVG3snOf8bEOU= From: Krzysztof Kozlowski To: Albert Aribaud , Jaehoon Chung , Lukasz Majewski , Krzysztof Kozlowski , Minkyu Kang , Simon Glass , Marek Szyprowski , u-boot@lists.denx.de Date: Wed, 6 Mar 2019 19:37:55 +0100 Message-Id: <20190306183757.9063-8-krzk@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190306183757.9063-1-krzk@kernel.org> References: <20190306183757.9063-1-krzk@kernel.org> Subject: [U-Boot] [PATCH v5 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 Tested-by: Anand Moon --- 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)