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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 C4359C433DB for ; Mon, 29 Mar 2021 15:52:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8ECFE61964 for ; Mon, 29 Mar 2021 15:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231490AbhC2Pvu (ORCPT ); Mon, 29 Mar 2021 11:51:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230522AbhC2Pvr (ORCPT ); Mon, 29 Mar 2021 11:51:47 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CEAAEC061574 for ; Mon, 29 Mar 2021 08:51:46 -0700 (PDT) Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lQuB3-0006wI-6c; Mon, 29 Mar 2021 17:51:41 +0200 Received: from ukl by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lQuB2-00015v-Eu; Mon, 29 Mar 2021 17:51:40 +0200 Date: Mon, 29 Mar 2021 17:51:40 +0200 From: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= To: Clemens Gruber Cc: linux-pwm@vger.kernel.org, Thierry Reding , Sven Van Asbroeck , linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: Re: [PATCH v6 2/7] pwm: pca9685: Support hardware readout Message-ID: <20210329155140.4gjtsw2qbpylv77z@pengutronix.de> References: <20210329125707.182732-1-clemens.gruber@pqgruber.com> <20210329125707.182732-2-clemens.gruber@pqgruber.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="v4ybh3c4vqbu2ghd" Content-Disposition: inline In-Reply-To: <20210329125707.182732-2-clemens.gruber@pqgruber.com> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::c0 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --v4ybh3c4vqbu2ghd Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Clemens, On Mon, Mar 29, 2021 at 02:57:02PM +0200, Clemens Gruber wrote: > The hardware readout may return slightly different values than those > that were set in apply due to the limited range of possible prescale and > counter register values. This is fine and for most hardware that's not preventable. My requirement here is that=20 .get_state(pwm, &state); .apply_state(pwm, &state); doesn't yield any changes. Best regards Uwe --=20 Pengutronix e.K. | Uwe Kleine-K=F6nig | Industrial Linux Solutions | https://www.pengutronix.de/ | --v4ybh3c4vqbu2ghd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEfnIqFpAYrP8+dKQLwfwUeK3K7AkFAmBh94kACgkQwfwUeK3K 7AlRowf/Q90UI142a9noeyN0kCYojz+YUqe+s2Tv40n1ZmLKQz60m4UC94CxERro JJTA7hFA7xXgmUNzzI8sp159PQ6Pcc1ZTMmojZ5LCox2KBB/EAqzV+HxLwAqJY/o mFd1MzejkslcqMjujiRyfHeW9ZFZt3FW3ffiEvxrKIHsDsXinhhLCGjqpIihPmq3 8mxF99EbXV5xzNbX02or9WqM1pUaHBK+L9tjSy3KVqrPMeP9pYSg3zlIHH2B3oxA z80a/2h6GhNsXihz4jaJmY8Up1XLI8t3AVBCE4Sc0ei3fBEriR1EJScXiQVEFyEq LRrg318Yic6Qwzg9vZOHpPpOKyGCLQ== =kQFu -----END PGP SIGNATURE----- --v4ybh3c4vqbu2ghd--