From patchwork Thu Oct 4 05:51:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 10625623 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 362F414BD for ; Thu, 4 Oct 2018 05:52:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2062F28DF9 for ; Thu, 4 Oct 2018 05:52:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1287428E0C; Thu, 4 Oct 2018 05:52:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E5B0828DF9 for ; Thu, 4 Oct 2018 05:52:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726852AbeJDMnm (ORCPT ); Thu, 4 Oct 2018 08:43:42 -0400 Received: from mail.andi.de1.cc ([85.214.239.24]:59956 "EHLO h2641619.stratoserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726438AbeJDMnl (ORCPT ); Thu, 4 Oct 2018 08:43:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20180802; h=Message-Id:Date:Subject:Cc:To:From:Sender: Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=ZkJaryn0oRU0mMCGuUyfFKSashwDck+vSpj30SjDcuE=; b=jT6Zgg037sxkZK5PnjxSJtEFuw 8rT5ZcEpF0RWWG6mxh/iT0lM3B4y7GKGROWLf/nJFfI3f7kzqqz+k919uydcC+GdpY3j9N6qMOBww Hiezir6dkAE0+Wjxg5mzaxyQJ5RQrgzI55Zaj1rXiSrOSpSnyJqwo/GGbEDIzeS0z/U4=; Received: from p200300ccfbcbd5001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:cc:fbcb:d500:1a3d:a2ff:febf:d33a] helo=aktux) by h2641619.stratoserver.net with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1g7wYH-0003Xg-0k; Thu, 04 Oct 2018 07:51:57 +0200 Received: from andi by aktux with local (Exim 4.89) (envelope-from ) id 1g7wYG-00060V-KL; Thu, 04 Oct 2018 07:51:56 +0200 From: Andreas Kemnade To: t-kristo@ti.com, mturquette@baylibre.com, sboyd@kernel.org, linux-omap@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, paul@pwsan.com, tony@atomide.com, letux-kernel@openphoenux.org Cc: Andreas Kemnade Subject: [PATCH RFC 0/2] mach-omap2: handle autoidle denial Date: Thu, 4 Oct 2018 07:51:45 +0200 Message-Id: <20181004055147.23048-1-andreas@kemnade.info> X-Mailer: git-send-email 2.11.0 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On the gta04 with a dm3730 omap_hdq does not work properly when the device enters lower power states. Idling uart1 and 2 is enough to show up that problem, if there are no other things enabled. Further research reveals that hdq iclk must not be turned off during transfers, also according to the TRM. That fact is also correctly described in the flags but the code to handle that is incomplete. Since the order is first disable all autoidles, then disable selected and then enable all, we need to either change that order or add a usecount. Since it is done only in init, we could think about changing order. Andreas Kemnade (2): clk: ti: add a usecount for autoidle arm: mach-omap2: setup iclk autoidle according to flags arch/arm/mach-omap2/omap_hwmod.c | 8 ++++++-- drivers/clk/ti/autoidle.c | 20 ++++++++++++-------- include/linux/clk/ti.h | 1 + 3 files changed, 19 insertions(+), 10 deletions(-)