Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752201AbdIFSVO (ORCPT ); Wed, 6 Sep 2017 14:21:14 -0400 Received: from us01smtprelay-2.synopsys.com ([198.182.47.9]:60784 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751236AbdIFSVN (ORCPT ); Wed, 6 Sep 2017 14:21:13 -0400 From: Eugeniy Paltsev To: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Vineet Gupta , Alexey Brodkin , Eugeniy Paltsev Subject: [PATCH] ARC: AXS10x: Add temporary quirk to reset ethernet IP Date: Wed, 6 Sep 2017 21:21:08 +0300 Message-Id: <20170906182108.16765-1-Eugeniy.Paltsev@synopsys.com> X-Mailer: git-send-email 2.9.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1078 Lines: 33 DW ethernet controller on AXS10x hangs sometimes after SW reset, so add temporary quirk to reset DW ethernet controller IP core. This quirk can be removed after axs10x reset driver (see http://patchwork.ozlabs.org/patch/800273/) or simple reset driver (see https://patchwork.kernel.org/patch/9903375/) will be available in upstream. Signed-off-by: Eugeniy Paltsev --- arch/arc/plat-axs10x/axs10x.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arc/plat-axs10x/axs10x.c b/arch/arc/plat-axs10x/axs10x.c index f1ac679..cf14ebc 100644 --- a/arch/arc/plat-axs10x/axs10x.c +++ b/arch/arc/plat-axs10x/axs10x.c @@ -111,6 +111,13 @@ static void __init axs10x_early_init(void) axs10x_enable_gpio_intc_wire(); + /* + * Reset ethernet IP core. + * TODO: get rid of this quirk after axs10x reset driver (or simple + * reset driver) will be available in upstream. + */ + iowrite32((1 << 5), (void __iomem *) CREG_MB_SW_RESET); + scnprintf(mb, 32, "MainBoard v%d", mb_rev); axs10x_print_board_ver(CREG_MB_VER, mb); } -- 2.9.3