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=-5.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 BD627C11F66 for ; Tue, 6 Jul 2021 12:02:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9330620DB for ; Tue, 6 Jul 2021 12:02:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240617AbhGFMFX (ORCPT ); Tue, 6 Jul 2021 08:05:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:33316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237525AbhGFL63 (ORCPT ); Tue, 6 Jul 2021 07:58:29 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B6F8861179; Tue, 6 Jul 2021 11:55:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625572549; bh=JXmBsXYXG9KG7U5AjlAUHgTa15XndAwh6xpRx35ssAo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=JbOfwmVF4OkhS5vWEeG1/y6EzbbSwmaGz+O2PUgdxW8i2J5XsnE7M6+ypvPxZiLBM 3klouA+VESkfgGkHYyVBVx5HAXAMNeDdkwIVUlkmZB4SfoyyvNJwuuVLQZl1sl9nsf 0qQ7VeJLZSks0CiTqNdrnJgOXjaWxCHUW29odk/ZYWRSc+mczvm80gi1qDhbm2bNPq XWfnvdeAJB7ZdvMhgvuqLB+U0egmAIOso0LHfx4nboab6JTrLN15TfrTVD7LgBqzzZ nemt4h8ofc9CIUk76G2oifZwmbZ+SizUH2SPthodth6U5RWSM+ykcrqZnKpIuDWzz+ uyTdLgzFUAD1w== Date: Tue, 6 Jul 2021 12:55:17 +0100 From: Mark Brown To: Ulf Hansson Cc: Dmitry Baryshkov , Peter Chen , Andy Gross , Bjorn Andersson , Rob Herring , Liam Girdwood , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , linux-arm-msm , Manivannan Sadhasivam , DTML , Linux Kernel Mailing List , linux-bluetooth@vger.kernel.org Subject: Re: [PATCH v3 2/7] regulator: qca6390: add support for QCA639x powerup sequence Message-ID: <20210706115517.GB4529@sirena.org.uk> References: <20210621223141.1638189-1-dmitry.baryshkov@linaro.org> <20210621223141.1638189-3-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="24zk1gE8NUlDmwG9" Content-Disposition: inline In-Reply-To: X-Cookie: Some restrictions may apply. User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org --24zk1gE8NUlDmwG9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jul 06, 2021 at 09:54:03AM +0200, Ulf Hansson wrote: > On Tue, 22 Jun 2021 at 00:32, Dmitry Baryshkov > > Qualcomm QCA6390/1 is a family of WiFi + Bluetooth SoCs, with BT part > > being controlled through the UART and WiFi being present on PCIe > > bus. Both blocks share common power sources. Add device driver handling > > power sequencing of QCA6390/1. > Power sequencing of discoverable buses have been discussed several > times before at LKML. The last attempt [1] I am aware of, was in 2017 > from Peter Chen. I don't think there is a common solution, yet. This feels a bit different to the power sequencing problem - it's not exposing the individual inputs to the device but rather is a block that manages everything but needs a bit of a kick to get things going (I'd guess that with ACPI it'd be triggered via AML). It's in the same space but it's not quite the same issue I think, something that can handle control of the individual resources might still struggle with this. --24zk1gE8NUlDmwG9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmDkRKQACgkQJNaLcl1U h9A9oAf/QENRZjXRFVPDjWc5SZZ1jRLz0JmogYRWNMICgbOtz1VBdXoNW/Lww3pt dke5UKjZ+XQkNR3aavlJL+PatLcw5KcLLIM7q6seqDtyV3oesMqPe4eHpf7E8niH RlrkwxoSHb3r7/tYFr2TNDxL1ZuQKEOT1Bn1tcNP4krJ4sa2M4sYmM7XV4VdFlkE /ymTDt9FrU/lQZHkT414lAI615+uJqFaRn17h6TnrC0MhELJ/BoLo62tBWaO0gtv sey70r+PcIRzS6p/iA8i+HHNTfR5EiVnBF3tVidPeOwt8Haj8TfhdDGbvzeAuaDc sia1bg8tC8v+IFLkdkwWFG7TzvN8ZQ== =L8x2 -----END PGP SIGNATURE----- --24zk1gE8NUlDmwG9--