From patchwork Mon Nov 14 11:55:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 9427281 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C19896047D for ; Mon, 14 Nov 2016 11:55:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B3B0728746 for ; Mon, 14 Nov 2016 11:55:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A8976287D6; Mon, 14 Nov 2016 11:55:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ABFD3287D8 for ; Mon, 14 Nov 2016 11:55:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753154AbcKNLza (ORCPT ); Mon, 14 Nov 2016 06:55:30 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.163]:34500 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751222AbcKNLz3 (ORCPT ); Mon, 14 Nov 2016 06:55:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1479124525; l=1105; s=domk; d=goldelico.com; h=Date:Subject:Cc:To:From; bh=WCdniYlBMzxwcBpxrXlLeFxNgR/c8i7gJRS7loNVXKc=; b=FFTxwFNmXytqZxzthifL2cri2q9/k23Gw9jTTqSiAIIV6X5LqrD+y7nkb/m+IOP33d oCt6yeq/E2IeBx35dmA4BN2EH5rqBHF10AgUuV3tJqtxBlYZ0JB8zFe5M41qROq2cQef ApvcsQzxLN5lGHzatSoTi8V9jf8uLiKi02nss= X-RZG-AUTH: :JGIXVUS7cutRB/49FwqZ7WcZa0CjPwrtwsa7s0mYZj78qgN6BSs46A== X-RZG-CLASS-ID: mo00 Received: from localhost.localdomain (p57AE0822.dip0.t-ipconnect.de [87.174.8.34]) by smtp.strato.de (RZmta 39.9 DYNA|AUTH) with ESMTPA id k037a4sAEBtGsYz; Mon, 14 Nov 2016 12:55:16 +0100 (CET) From: "H. Nikolaus Schaller" To: =?UTF-8?q?Beno=C3=AEt=20Cousson?= , Tony Lindgren , Rob Herring , Mark Rutland , Russell King Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pyra-handheld.com, "H. Nikolaus Schaller" Subject: [PATCH v3] dts: omap5: board-common: fix wrong SMPS6 (VDD-DDR3) voltage Date: Mon, 14 Nov 2016 12:55:15 +0100 Message-Id: <9718ff02c1c863e97bf1247009db8292fcff7d8d.1479124514.git.hns@goldelico.com> X-Mailer: git-send-email 2.7.3 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP DDR3L is usually specified as JEDEC standard 1.35V(1.28V~1.45V) & 1.5V(1.425V~1.575V) Therefore setting smps6 regulator to 1.2V is definitively below minimum. It appears that real world chips are more forgiving than data sheets indicate, but let's set the regulator right. Note: a board that uses other voltages (DDR with 1.5V) can overwrite by referencing &smps6_reg. Signed-off-by: H. Nikolaus Schaller --- arch/arm/boot/dts/omap5-board-common.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/omap5-board-common.dtsi b/arch/arm/boot/dts/omap5-board-common.dtsi index ab60a8e..e4a14d5 100644 --- a/arch/arm/boot/dts/omap5-board-common.dtsi +++ b/arch/arm/boot/dts/omap5-board-common.dtsi @@ -476,8 +476,8 @@ smps6_reg: smps6 { /* VDD_DDR3 - over VDD_SMPS6 */ regulator-name = "smps6"; - regulator-min-microvolt = <1200000>; - regulator-max-microvolt = <1200000>; + regulator-min-microvolt = <1350000>; + regulator-max-microvolt = <1350000>; regulator-always-on; regulator-boot-on; };