From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752689AbdCMLxf (ORCPT ); Mon, 13 Mar 2017 07:53:35 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:63203 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751058AbdCMLxZ (ORCPT ); Mon, 13 Mar 2017 07:53:25 -0400 From: Roger Quadros To: , CC: , , , , , Roger Quadros Subject: [PATCH 0/4] ARM: DRA7: Fix DCAN1 stuck-in-transition Date: Mon, 13 Mar 2017 13:53:12 +0200 Message-ID: <1489405996-10718-1-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On DRA7 platform, DCAN1 module has an issue when it's clockdomain (WKUPAON) is configured in HW_AUTO. After DCAN1 is enabled and disabled the module remains stuck in transition. Suggested workaround by Silicon team is to disable HW_AUTO for WKUPAON clockdomain when DCAN1 module is active. These patches provide a new flag for hwmod data to support this behaviour and fix up dra7 hwmod data as well to fix this issue on dra7x-evms. This patch allows DCAN1 to be functional as well as not prevent Core Retention as WKUPAON clockdomain is put back into HW_AUTO whenever DCAN1 is not active (e.g. runtime suspended). Without this series, we can see the following warning messages when the CAN interface is brought up and down. ~# ifconfig can0 up [ 36.418299] net can0: c_can_hw_raminit_wait_syscon: time out [ 36.424642] c_can_platform 4ae3c000.can can0: setting BTR=1c04 BRPE=0000 ~# ifconfig can0 down [ 50.488786] omap_hwmod: dcan1: _wait_target_disable failed [ 50.502855] omap_hwmod: dcan1: _wait_target_disable failed cheers, -roger Roger Quadros (3): ARM: OMAP2+ hwmod: Allow modules to disable HW_AUTO ARM: DRA7: hwmod: Fix DCAN1 stuck in transition ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg_ss Sekhar Nori (1): ARM: OMAP2+: omap_hwmod: provide space for more hwmod flags arch/arm/mach-omap2/omap_hwmod.c | 4 ++-- arch/arm/mach-omap2/omap_hwmod.h | 7 ++++++- arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 4 ++++ 3 files changed, 12 insertions(+), 3 deletions(-) -- 2.7.4