From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757580AbcHWI4K (ORCPT ); Tue, 23 Aug 2016 04:56:10 -0400 Received: from down.free-electrons.com ([37.187.137.238]:50426 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756490AbcHWI4D (ORCPT ); Tue, 23 Aug 2016 04:56:03 -0400 From: Alexandre Belloni To: Daniel Lezcano Cc: Thomas Gleixner , Boris Brezillon , Nicolas Ferre , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandre Belloni Subject: [PATCH v3 1/4] clocksource: timer-atmel-pit: enable mck Date: Tue, 23 Aug 2016 10:44:02 +0200 Message-Id: <1471941845-24813-2-git-send-email-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1471941845-24813-1-git-send-email-alexandre.belloni@free-electrons.com> References: <1471941845-24813-1-git-send-email-alexandre.belloni@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org mck is needed to get the PIT working. Explicitly prepare_enable it instead of assuming it is enabled. This solves an issue where the system is freezing when the ETM/ETB drivers are enabled. Reported-by: Olivier Schonken Reviewed-by: Boris Brezillon Acked-by: Nicolas Ferre Signed-off-by: Alexandre Belloni --- drivers/clocksource/timer-atmel-pit.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c index 1ffac0cb0cb7..3494bc5a21d5 100644 --- a/drivers/clocksource/timer-atmel-pit.c +++ b/drivers/clocksource/timer-atmel-pit.c @@ -261,6 +261,12 @@ static int __init at91sam926x_pit_dt_init(struct device_node *node) return PTR_ERR(data->mck); } + ret = clk_prepare_enable(data->mck); + if (ret) { + pr_err("Unable to enable mck\n"); + return ret; + } + /* Get the interrupts property */ data->irq = irq_of_parse_and_map(node, 0); if (!data->irq) { -- 2.8.1