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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 5BFD0C43441 for ; Wed, 28 Nov 2018 10:22:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B59420660 for ; Wed, 28 Nov 2018 10:22:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B59420660 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728363AbeK1VXe (ORCPT ); Wed, 28 Nov 2018 16:23:34 -0500 Received: from mail.bootlin.com ([62.4.15.54]:47393 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727616AbeK1VXe (ORCPT ); Wed, 28 Nov 2018 16:23:34 -0500 Received: by mail.bootlin.com (Postfix, from userid 110) id C9F1320701; Wed, 28 Nov 2018 11:22:22 +0100 (CET) Received: from localhost (aaubervilliers-681-1-94-205.w90-88.abo.wanadoo.fr [90.88.35.205]) by mail.bootlin.com (Postfix) with ESMTPSA id 966F22039F; Wed, 28 Nov 2018 11:22:12 +0100 (CET) Date: Wed, 28 Nov 2018 11:22:12 +0100 From: Maxime Ripard To: Chen-Yu Tsai Cc: Alexandre Belloni , Alessandro Zummo , Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland , linux-arm-kernel@lists.infradead.org, linux-rtc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: Re: [PATCH 06/15] rtc: sun6i: Add support for different variants Message-ID: <20181128102212.4sodbbk6uu52nug3@flea> References: <20181128093013.24442-1-wens@csie.org> <20181128093013.24442-7-wens@csie.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="abq6ote33gmac3x6" Content-Disposition: inline In-Reply-To: <20181128093013.24442-7-wens@csie.org> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --abq6ote33gmac3x6 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Nov 28, 2018 at 05:30:03PM +0800, Chen-Yu Tsai wrote: > Amongst the Allwinner SoCs that have seen some kind of coverage by the > linux-sunxi community, whether it be mainline Linux or U-boot support, > or just available datasheets, most newer chips use the RTC design first > seen in the A31 (sun6i). >=20 > Overall there have been some minor differences. This patch covers the > following: >=20 > - average clock rate of the internal RC oscillator > + presence of fixed and adjustable prescaler for this clock > - availability of an external (to the SoC) clock output >=20 > One major difference regarding the H6 is the 24 MHz crystal is now > routed through the RTC, as a digitally compensated oscillator (DCXO). > This is not covered in this patch and will be supported later. >=20 > Other differences are either unrelated to RTC or clock functionality, > such as boot or crypto related registers, or the driver simply doesn't > use the feature in question. One example of the latter is the > calibration function for the RC oscillator. We consider this clock to > be very bad and avoid using it. >=20 > Signed-off-by: Chen-Yu Tsai Acked-by: Maxime Ripard Maxime --=20 Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --abq6ote33gmac3x6 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCW/5sVAAKCRDj7w1vZxhR xbgfAQCrRuACC6/4VYLiVFJ1VyJVIUwm58P/hcdy/38wZQh33wEAqiPnqEPr16zt jth0aWCyPpcIr2U7MelKvSuTvoFJAgI= =O851 -----END PGP SIGNATURE----- --abq6ote33gmac3x6--