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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00D49C433EF for ; Tue, 28 Sep 2021 08:43:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB086611CA for ; Tue, 28 Sep 2021 08:43:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239659AbhI1IpC (ORCPT ); Tue, 28 Sep 2021 04:45:02 -0400 Received: from esa.microchip.iphmx.com ([68.232.154.123]:59247 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239639AbhI1Iow (ORCPT ); Tue, 28 Sep 2021 04:44:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1632818593; x=1664354593; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=YvsqvIz8zOr3ivUKTHHuuOf1oT832h6IMldyet80HTk=; b=UhUAsFk/7ApYgISq6OzedkzBGEYU+JexIwLCgvFhov+oCnc2r9+/ugHJ v17nLUdZtaLKBGuLXtXG1ww+gZI+i0f6bh9bUgfXTKfN6KR3/+JCEvY8G mzu1YZsLgpq4/oteLHXQcqFdOKqlXP44KYk1yyweHWXZ1TnoXx6Fpb2ag uInn+6NAnozqvMcdmVAKweD95pJAfal9zuERB08ddCphUeP7VlEtla21h KY1QLq61XV8Iy6ct2xaVzf2us9JOsDxSzdpf79RK6rDuHQTFJp0bP46RC cMaOv9tFXYTqQBN5bZFIObM/pjZx0DyNOFWRo7DQI0y61XAcduNZRIvSy w==; IronPort-SDR: i36tkYAydb6Qyx0pWKDoUlWxa087eANuG50jHtCZzZWiXdh84gTInLQTCn9YqRMv779t9unDEo +OYCIU8kY/Rl6bt7+a6xJ9DBDKJR1JtfFSP9/DY+1Tq03vD2hQKnFRkWbsJmR4mn0O7UdVS8Cr /fZIW16BHR+SZ30qyelZPP0Nsw4gFNzrVIdz6cvhKuAz4Y1s17pUzI5im25L2CPOwN5f84KT5j J5V2wr916v1DN/ITtR85fpRd5/yZYT3EG/4PH5aOpdLrlUQar2isNaUHs0j83qs/J5zynyNJT+ aRUlEOF2xrOJ8iUV6E4rKy+K X-IronPort-AV: E=Sophos;i="5.85,329,1624345200"; d="scan'208";a="70895818" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 28 Sep 2021 01:43:12 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.14; Tue, 28 Sep 2021 01:43:11 -0700 Received: from rob-dk-mpu01.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2176.14 via Frontend Transport; Tue, 28 Sep 2021 01:43:09 -0700 From: Claudiu Beznea To: , , , , CC: , , , Claudiu Beznea Subject: [PATCH 1/3] ARM: dts: at91: sama7g5ek: add suspend voltage for ddr3l rail Date: Tue, 28 Sep 2021 11:42:55 +0300 Message-ID: <20210928084257.2188017-2-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210928084257.2188017-1-claudiu.beznea@microchip.com> References: <20210928084257.2188017-1-claudiu.beznea@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SAMA7G5-EK board has DDR3L type of memory soldered. This needs 1.35V. The 1.35V for DDR3L rail at run-time is selected by the proper configuration on SELV2 pin (for 1.35V it needs to be in high-z state). When suspended the MCP16502 PMIC soldered on SAMA7G5-EK will use different sets of configuration registers to provide proper voltages on its rail. Run-time configuration registers could be configured differently than suspend configuration register for MCP16502 (VSEL2 affects only run-time configuration). In suspend states the DDR3L memory soldered on SAMA7G5-EK switches to self-refresh. Even on self-refresh it needs to be powered by a 1.35V rail. Thus, make sure the PMIC is configured properly when system is suspended. Fixes: 7540629e2fc7 (ARM: dts: at91: add sama7g5 SoC DT and sama7g5-ek") Signed-off-by: Claudiu Beznea --- arch/arm/boot/dts/at91-sama7g5ek.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts index 4e6bcb7fdfd4..be905eb1da31 100644 --- a/arch/arm/boot/dts/at91-sama7g5ek.dts +++ b/arch/arm/boot/dts/at91-sama7g5ek.dts @@ -206,11 +206,13 @@ vddioddr: VDD_DDR { regulator-state-standby { regulator-on-in-suspend; + regulator-suspend-microvolt = <1350000>; regulator-mode = <4>; }; regulator-state-mem { regulator-on-in-suspend; + regulator-suspend-microvolt = <1350000>; regulator-mode = <4>; }; }; -- 2.25.1