From patchwork Wed Jan 22 11:35:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 313216 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Received: from casper.infradead.org (unknown [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id B6A6B2C00B1 for ; Wed, 22 Jan 2014 22:36:49 +1100 (EST) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5w6n-0005vL-8x; Wed, 22 Jan 2014 11:36:37 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5w6k-0002zW-Sk; Wed, 22 Jan 2014 11:36:34 +0000 Received: from galois.linutronix.de ([2001:470:1f0b:db:abcd:42:0:1]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5w6h-0002yy-LY for linux-arm-kernel@lists.infradead.org; Wed, 22 Jan 2014 11:36:32 +0000 Received: from localhost ([127.0.0.1] helo=bazinga.breakpoint.cc) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1W5w6J-0006fb-Re; Wed, 22 Jan 2014 12:36:08 +0100 From: Sebastian Andrzej Siewior To: Sascha Hauer Subject: [PATCH] ARM: imx: enable delaytimer on the imx timer Date: Wed, 22 Jan 2014 12:35:44 +0100 Message-Id: <1390390544-10319-1-git-send-email-bigeasy@linutronix.de> X-Mailer: git-send-email 1.8.5.2 X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1, SHORTCIRCUIT=-0.0001 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140122_063631_945937_6645433B X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.6 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Sebastian Andrzej Siewior , Shawn Guo , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org The imx can support timer-based delays, so implement this. Skips past jiffy calibration. Signed-off-by: Sebastian Andrzej Siewior --- Tested on imx51. arch/arm/mach-imx/time.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c index cd46529..19c5cf9 100644 --- a/arch/arm/mach-imx/time.c +++ b/arch/arm/mach-imx/time.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -116,11 +117,22 @@ static u32 notrace mxc_read_sched_clock(void) return sched_clock_reg ? __raw_readl(sched_clock_reg) : 0; } +static struct delay_timer imx_delay_timer; + +static unsigned long imx_read_current_timer(void) +{ + return __raw_readl(sched_clock_reg); +} + static int __init mxc_clocksource_init(struct clk *timer_clk) { unsigned int c = clk_get_rate(timer_clk); void __iomem *reg = timer_base + (timer_is_v2() ? V2_TCN : MX1_2_TCN); + imx_delay_timer.read_current_timer = &imx_read_current_timer; + imx_delay_timer.freq = c; + register_current_timer_delay(&imx_delay_timer); + sched_clock_reg = reg; setup_sched_clock(mxc_read_sched_clock, 32, c);