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 X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F1AFC433E1 for ; Sun, 5 Jul 2020 18:23:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C9D22074F for ; Sun, 5 Jul 2020 18:23:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593973393; bh=GbBgUHwVyFNVrox6zXNCfKHMyhGZPd6sbF6NrHKp9Q0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=L2z9A+bwN7wYXWm0eKLt2mKqwEClS155Zxa+JcH/YPeZuqytVC7Nb1mi+iuO/Of2F i6O9RcMZmXtspjb1M0t109MV2THkE0M8ckjoPzj4rv6RJ+yFMC3c5Hl0pTbjmjempX vR3JN6UNOYt+wvF7ciQ6Qknjv5aZXvSNcBR1/7lI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728006AbgGESXM (ORCPT ); Sun, 5 Jul 2020 14:23:12 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:54865 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727892AbgGESXL (ORCPT ); Sun, 5 Jul 2020 14:23:11 -0400 Received: by mail-wm1-f66.google.com with SMTP id o8so36806802wmh.4; Sun, 05 Jul 2020 11:23:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=3ewSbHGUAYFQOAlLNlmtHPlZwLMl/ZdY7qWT4Kwd5Vw=; b=Ad3UXYha9OjEjh0YXkJ15BSPKAM7VWhJCi1LOJaCgWH3/lA+Vq+P+6jiNcj+tgpOJn 68vSW9MQhPrwfEotY/5dzBhDYMpuIBa2YJMzpZMaQ+4yy5m0UZe90fK6nd4K7HiRLGni awG4e31MZjxgYnozLA4ckB96oBfN1SF5kwl99DBbRzxOQfvm0PBjOuMXlsFPGxe2sDoR cPAOZ8H58jeF2GT99gbyoUbvmaJ/ftXu9bv1CuHHpvwgAK+t4K4m1yc5wvOHrRHpYVLL LoKezTy9dr8xjLKUDVmAsLbyAHnK6eZzLBxTvYUPY5ctS1orf66B3q810gPfgVlkc1De coKA== X-Gm-Message-State: AOAM533+Sh0bjEkrob6gnGqWPBCp9eeLKUlNoRYNp0Xd6cBZTl/9yZeR 0nah54pIFqI6yajbtGG+TqR7WaYH X-Google-Smtp-Source: ABdhPJxf+h2deTZ0d1sNxH1w2pDDNt/UiEgEEdWTSth3T5lJVshwp5A+S2mwSPC8Fv2zMDbUvcbUIg== X-Received: by 2002:a1c:7216:: with SMTP id n22mr40486802wmc.189.1593973389531; Sun, 05 Jul 2020 11:23:09 -0700 (PDT) Received: from kozik-lap ([194.230.155.195]) by smtp.googlemail.com with ESMTPSA id v11sm57523694wmb.3.2020.07.05.11.23.08 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sun, 05 Jul 2020 11:23:08 -0700 (PDT) Date: Sun, 5 Jul 2020 20:23:06 +0200 From: Krzysztof Kozlowski To: Alim Akhtar Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org Subject: Re: [PATCH v1 2/2] arm64: dts: exynos: keep LDO12 always-on Message-ID: <20200705182306.GA13827@kozik-lap> References: <20200705070918.63531-1-alim.akhtar@samsung.com> <20200705070918.63531-2-alim.akhtar@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200705070918.63531-2-alim.akhtar@samsung.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jul 05, 2020 at 12:39:18PM +0530, Alim Akhtar wrote: > LDO12 on exynos7 supply power to VDDQ_UFS20_RESET, > in case this regulator is OFF, UFS host controller > can not send command to UFS device. To keep this supply > ON, set regulator-always-on property for this ldo. Why UFS does not take any supplies? This looks like a workaround for the case of not implementing any consumer. Best regards, Krzysztof > > Signed-off-by: Alim Akhtar > --- > arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > index bb86950032d3..92fecc539c6c 100644 > --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts > @@ -194,6 +194,7 @@ > regulator-min-microvolt = <1000000>; > regulator-max-microvolt = <1300000>; > regulator-enable-ramp-delay = <125>; > + regulator-always-on; > }; > > ldo13_reg: LDO13 { > -- > 2.17.1 >