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=-8.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 31757C2D0A8 for ; Mon, 28 Sep 2020 12:52:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C098522204 for ; Mon, 28 Sep 2020 12:52:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AfFzz2qI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726504AbgI1MwE (ORCPT ); Mon, 28 Sep 2020 08:52:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726415AbgI1MwE (ORCPT ); Mon, 28 Sep 2020 08:52:04 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1D9AC061755; Mon, 28 Sep 2020 05:52:03 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id g4so1207476wrs.5; Mon, 28 Sep 2020 05:52:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=ixzXxdwc77/F5EB6zZGlL+a1Hf/Z5UQadBnLKAZ43Wo=; b=AfFzz2qIjvvzVaz06B97nEUh+GLE9r0R/4hrtsIzsLCUouoxTQxgs3iNP13pKSeVrg 6ZGdHMX2PeDtaInjnl6fUBY6n2cWBVKOkW8bmU9AfLwprSmAUFw1iBVncMzW7nGwSB+R qvnCSrqUGGmKyKa3jZNqTeRDFUsytWNshM/+QlExqNQ+6rsyYSmmwrzweYN0vb+jZTsv 5u1PShWTPXDyGgFrLQouJV75Un8VLnMGmpIGhJNqqVU+7/qmK/j/icJBPm49g26KijtI OpoxZFE2ZLfsWkUJ5dfvaX0KG+O7zP3R9lyjns9DmGiHc64S0UwO0X20MDCmQCzkyeyD wH4Q== 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=ixzXxdwc77/F5EB6zZGlL+a1Hf/Z5UQadBnLKAZ43Wo=; b=k7Vi95+sYp3x3a0zDUedeqMHcTOjvkRIkOnpDb6gcyQqXzRp2Ext0L05uDcMvRLIRQ IZsnZ/0uw6xFI7u6cR9m0Hjy4SQXCBOpwxk3tLjzCZ327LFQwZgAEsPVyardIo4eDcc2 MTe+JqNlpHUpZ7xnNZado3QT+lgHD9cibFs0ZABkXnqOiXj+t47BqXNSrh2T7joWu44Q FRPqikDiz9bb9mda4gCSl8MzJaHdaaljplXKRiQebRBPaSvVs6EV0ygvVF5RgPZgSAi2 QWnrewcqh6tWuYBbg9b3AiYqD9Q9P87vYSKP6PQyI4EVJz3Qqr0qpdlN+aq0p2kqkJP4 o4og== X-Gm-Message-State: AOAM531HQuzUT3HclSnv8PH5PW9eypknZX/kQlTvzV595zSPkKxxSquK UV7dnRAekxIdgIRHJOAJE9E= X-Google-Smtp-Source: ABdhPJy0fTcsqu8tJhuFWhfOnaBqoiIZ5natgVeK+XWgPIJOEhOqewl4A7r4vQsy+CJ3pJsts8bC8Q== X-Received: by 2002:adf:9b8b:: with SMTP id d11mr1665079wrc.71.1601297522461; Mon, 28 Sep 2020 05:52:02 -0700 (PDT) Received: from localhost ([217.111.27.204]) by smtp.gmail.com with ESMTPSA id i33sm1533678wri.79.2020.09.28.05.52.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Sep 2020 05:52:00 -0700 (PDT) Date: Mon, 28 Sep 2020 14:51:58 +0200 From: Thierry Reding To: JC Kuo Cc: gregkh@linuxfoundation.org, robh@kernel.org, jonathanh@nvidia.com, kishon@ti.com, linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, nkristam@nvidia.com Subject: Re: [PATCH v3 01/15] clk: tegra: Add PLLE HW power sequencer control Message-ID: <20200928125158.GA3065790@ulmo> References: <20200909081041.3190157-1-jckuo@nvidia.com> <20200909081041.3190157-2-jckuo@nvidia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="wac7ysb48OaltWcw" Content-Disposition: inline In-Reply-To: <20200909081041.3190157-2-jckuo@nvidia.com> User-Agent: Mutt/1.14.7 (2020-08-29) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org --wac7ysb48OaltWcw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Sep 09, 2020 at 04:10:27PM +0800, JC Kuo wrote: > PLLE has a hardware power sequencer logic which is a state machine > that can power on/off PLLE without any software intervention. The > sequencer has two inputs, one from XUSB UPHY PLL and the other from > SATA UPHY PLL. PLLE provides reference clock to XUSB and SATA UPHY > PLLs. When both of the downstream PLLs are powered-off, PLLE hardware > power sequencer will automatically power off PLLE for power saving. >=20 > XUSB and SATA UPHY PLLs also have their own hardware power sequencer > logic. XUSB UPHY PLL is shared between XUSB SuperSpeed ports and PCIE > controllers. The XUSB UPHY PLL hardware power sequencer has inputs > from XUSB and PCIE. When all of the XUSB SuperSpeed ports and PCIE > controllers are in low power state, XUSB UPHY PLL hardware power > sequencer automatically power off PLL and flags idle to PLLE hardware > power sequencer. Similar applies to SATA UPHY PLL. >=20 > PLLE hardware power sequencer has to be enabled after both downstream > sequencers are enabled. >=20 > This commit adds two helper functions: > 1. tegra210_plle_hw_sequence_start() for XUSB PADCTL driver to enable > PLLE hardware sequencer at proper time. >=20 > 2. tegra210_plle_hw_sequence_is_enabled() for XUSB PADCTL driver to > check whether PLLE hardware sequencer has been enabled or not. >=20 > Signed-off-by: JC Kuo > --- > v3: > rename 'val' with 'value >=20 > drivers/clk/tegra/clk-tegra210.c | 51 ++++++++++++++++++++++++++++++++ > include/linux/clk/tegra.h | 2 ++ > 2 files changed, 53 insertions(+) Acked-by: Thierry Reding --wac7ysb48OaltWcw Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAl9x3GoACgkQ3SOs138+ s6E8zA//X72FLMZsvq0ehMvTMnGUFDQCTFAcoaAjJWIsFSXzCu2cOlOnUzGff0nr Ps2OIt30Gv0cumo34Aci9ttDLe2lCHmYY3Jc+Yx4Jg0thE+bcqK7REHFichWw0bR NXVyT76WfWqkFjePOeX+KIho2SS8GPs3T21a14WD5bgJThny6IZe+plQkLUR3j7I QloXTpSQUkA9I+aaIq+se0crgsRQuV/cNxUWh03nKBgr134u/jB8xfRKk/kjggWi yLYWwOMwxrQppOledLF8yn5ad9wnrOzlP3ebG5p1gMolebLuCR/XdPLcoSDxOTjt PP7vgjH9/HaWvn4IGDedM7FbBS9dYQarnqXtLUxh8gOz266cU8VeLRsrGSSsGjii tqHRf100EJbt0cCqExkzUhMYaHFGjSydtjzB7YmBZt2JodNzQEBxS+tFJaGzLjMc RDDZO4tNR196nJtC5U2/lBFUR8TvJBnLEKbR30DGeF03fyJ6gH04bM9YD+/mBhK8 Sx8kKK6iPyp90AA55XhmaSV+Oo38Q8HIGKmp7vFnYphfbWnGNBiaJwT6tGmLUdl2 +lXHRemozVSWQe62uKHhirLg76k3KydGf/OEJuC5S547iAG0o1xkUJ4giOweo+Q6 q9gk7vkkp34qztWWceQF3OnlURNNWwSoJ3v50HDnqWhkIsPHopU= =2pDf -----END PGP SIGNATURE----- --wac7ysb48OaltWcw--