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 ED3F9C4332F for ; Tue, 16 Nov 2021 03:15:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CADCF63217 for ; Tue, 16 Nov 2021 03:15:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238941AbhKPDSI (ORCPT ); Mon, 15 Nov 2021 22:18:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237727AbhKPDRz (ORCPT ); Mon, 15 Nov 2021 22:17:55 -0500 Received: from mail-ot1-x330.google.com (mail-ot1-x330.google.com [IPv6:2607:f8b0:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 594EEC043192 for ; Mon, 15 Nov 2021 15:45:47 -0800 (PST) Received: by mail-ot1-x330.google.com with SMTP id o15-20020a9d410f000000b0055c942cc7a0so30258335ote.8 for ; Mon, 15 Nov 2021 15:45:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:in-reply-to:references:from:user-agent:date:message-id :subject:to:cc; bh=DJxnAju8ZcoHymLSy/2zxtKet5bzIUVWZOB8Xt+TFDM=; b=MrYtDApAgMWv95IIbmh2ZbmKWIdvEbyaVwK++N/ANKcr1LFdbHpeshfpvFJ7WcKewM r3eXc4CSQJ8aLR22q9fFIKN/yy87kzTl24H/tCzYorrOHnp7C8G8W3IQvzIfouWUuMIh 5wfp5+YNlBMIBeOh1odqjGFG4xRYoQGxUCHgU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:in-reply-to:references:from :user-agent:date:message-id:subject:to:cc; bh=DJxnAju8ZcoHymLSy/2zxtKet5bzIUVWZOB8Xt+TFDM=; b=zc+Z/PiHa4a17MgtZW6aDNydpMfR3bRAHq378TBacCN/QBnxWcxfJbTxwhGqeXga42 bjkdjia7yNWukRv3HIGUurSwcnxVXKwCQMzKesLDXt4ZWKg4fJuK2KbR54mWF9sWIOIc LtHkuU91ACNoolWCwiZcaGxovVi7O9i3hmTSpVV2fyJeNo+i+5EaIxqLkdIkmHNBVUfr Q4Voot1T50uYqWswNO4ch6T4zzw5rl9U9UqTg7MLsdi4MRGNwN+O8vyxpxLd01IqT+Wi P/3ykWjw/GE0qR9fYbcwapeJUpVzN36Ueeo2EZohzsesd0tdwI6ks1JmQbEKFQ2JIIYe AkJQ== X-Gm-Message-State: AOAM5322rGj1WmLLZSZYMywwVEg7IDMMNwqyIt2uVn8dnkP5sPbgdk/1 Ii6YRzZm5+/9LEVjd9yREsDGnF6Gmx1zJ+1K8A/NaWmjbB8= X-Google-Smtp-Source: ABdhPJxIHTJ4V0v3V0REg6nwGmuD8+3FvwcZO5Cv3CkaMLWJnA1lIGUFiTSPqAkR30MnUa8+OH3cLsFZG0TnE2Wr1mY= X-Received: by 2002:a9d:7655:: with SMTP id o21mr2410261otl.126.1637019946748; Mon, 15 Nov 2021 15:45:46 -0800 (PST) Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Mon, 15 Nov 2021 15:45:46 -0800 MIME-Version: 1.0 In-Reply-To: <20211115030155.9395-1-yangcong5@huaqin.corp-partner.google.com> References: <20211115030155.9395-1-yangcong5@huaqin.corp-partner.google.com> From: Stephen Boyd User-Agent: alot/0.9.1 Date: Mon, 15 Nov 2021 15:45:46 -0800 Message-ID: Subject: Re: [PATCH] arm64: dts: sc7180: Fix ps8640 power sequence for Homestar rev4 To: agross@kernel.org, bjorn.andersson@linaro.org, dianders@chromium.org, philipchen@chromium.org, robh+dt@kernel.org, yangcong Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting yangcong (2021-11-14 19:01:55) > When powering up the ps8640, we need to deassert PD right > after we turn on the vdd33 regulator. Unfortunately, the vdd33 > regulator takes some time (~4ms) to turn on. Add in the delay > for the vdd33 regulator so that when the driver deasserts PD > that the regulator has had time to ramp. > > Signed-off-by: yangcong > --- Reviewed-by: Stephen Boyd