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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD687C77B7F for ; Fri, 21 Apr 2023 14:00:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232073AbjDUOAN (ORCPT ); Fri, 21 Apr 2023 10:00:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40938 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232053AbjDUOAG (ORCPT ); Fri, 21 Apr 2023 10:00:06 -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 4E30310DB for ; Fri, 21 Apr 2023 07:00:05 -0700 (PDT) Received: from moin.white.stw.pengutronix.de ([2a0a:edc0:0:b01:1d::7b] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pprIo-0005xu-Ob; Fri, 21 Apr 2023 15:59:54 +0200 Received: from pengutronix.de (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: mkl-all@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id 54D181B4D67; Fri, 21 Apr 2023 13:59:53 +0000 (UTC) Date: Fri, 21 Apr 2023 15:59:52 +0200 From: Marc Kleine-Budde To: Alexander Stein Cc: NXP Linux Team , "A. Sverdlin" , Dong Aisheng , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] i2c: lpi2c: cache peripheral clock rate Message-ID: <20230421-kinfolk-glancing-e185fd9c47b4-mkl@pengutronix.de> References: <20230310130815.562418-1-alexander.sverdlin@siemens.com> <9272339.EvYhyI6sBW@steina-w> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ixwc7u7twriofslc" Content-Disposition: inline In-Reply-To: <9272339.EvYhyI6sBW@steina-w> X-SA-Exim-Connect-IP: 2a0a:edc0:0:b01:1d::7b X-SA-Exim-Mail-From: mkl@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 --ixwc7u7twriofslc Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 21.04.2023 15:48:59, Alexander Stein wrote: [...] > Now lpi2c_runtime_resume will call into clk_prepare() which also calls=20 > clk_prepare_lock() (identical to clk_get_rate). IIRC this is a general problem^w limitation of the clock framework, clock providers cannot use clocks themselves in certain callback, e.g. set_rate. Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung N=C3=BCrnberg | Phone: +49-5121-206917-129 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 | --ixwc7u7twriofslc Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEDs2BvajyNKlf9TJQvlAcSiqKBOgFAmRCltUACgkQvlAcSiqK BOjeTAf+MQiPaYHFR1uULcuIXbV2XHiPm53lGdm5hp9wwSK166fJ17jq6knT8epB HxkB1bn+Hl+tuF0ncFn1ip15GIlmFFxGkn/ZqAjKqC+Im0n1pFg1q5hfBx47YEZ+ X2ngxOrTelGlUZl7Aw3Q8rpia2IiLgxwArBMSOqg1B1dIAIPE9+iXuTevhONuHDy HmeJ46SsI9IBV9+za6RBW8AhSLapLybAyZ157K03G2oCEHGj3G8zB9salQDsFYfF lnCvyEDKLy1glmKBpJcCL8388/GWbiuO74ifWDAYtr67hn4TZ3BFT3ArWMTu45lG uefuUneOirrPnBQsZIDeTRUpXU2Bqg== =OK92 -----END PGP SIGNATURE----- --ixwc7u7twriofslc--