From patchwork Thu Oct 4 20:38:15 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 10626679 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 ECED0174A for ; Thu, 4 Oct 2018 20:38:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E09F5296EF for ; Thu, 4 Oct 2018 20:38:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D46F9296FB; Thu, 4 Oct 2018 20:38:46 +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 777F0296EF for ; Thu, 4 Oct 2018 20:38:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727814AbeJEDda (ORCPT ); Thu, 4 Oct 2018 23:33:30 -0400 Received: from mail.andi.de1.cc ([85.214.239.24]:33928 "EHLO h2641619.stratoserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727523AbeJEDda (ORCPT ); Thu, 4 Oct 2018 23:33:30 -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=f5vN4Nr+Jqz2KJe3rLSHRYJR6SIZV4zzrcuUPCuhVa8=; b=Gx8sWVnp0VsBowr3guNIawi4bN UjoIiwKGKVZQ2waB3WB80Du7iXL/JPS0b/TiYS9FXT5l54mKLOAhejPqdpMxTzQLUrUa78jS2lPLR sYgFab5dbRHuucHjIZFUUvTibINCaqunUsBdeqnPPvDNzH0MTT+EjmBzVloHc0sjd3o0=; 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 1g8AO7-0007GT-Pf; Thu, 04 Oct 2018 22:38:23 +0200 Received: from andi by aktux with local (Exim 4.89) (envelope-from ) id 1g8AO7-0005m8-CU; Thu, 04 Oct 2018 22:38:23 +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, bcousson@baylibre.com, paul@pwsan.com, tony@atomide.com, letux-kernel@openphoenux.org Cc: Andreas Kemnade Subject: [PATCH 0/2] mach-omap2: handle autoidle denial Date: Thu, 4 Oct 2018 22:38:15 +0200 Message-Id: <20181004203817.22101-1-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. To handle multiple users of a single ick, autoidle is disabled when a user of that ick requires that (has the OCPIF_SWSUP_IDLE)) Changes since the RFC version: - mutex lock for autoidle changes - deny_idle/allow_idle calls moved to clock enable/disable of the individual modules Andreas Kemnade (2): clk: ti: add a usecount for autoidle arm: omap_hwmod disable ick autoidling when a hwmod requires that arch/arm/mach-omap2/omap_hwmod.c | 16 ++++++++++++---- drivers/clk/ti/autoidle.c | 32 ++++++++++++++++++++++++-------- include/linux/clk/ti.h | 1 + 3 files changed, 37 insertions(+), 12 deletions(-)