From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757650Ab3GETfk (ORCPT ); Fri, 5 Jul 2013 15:35:40 -0400 Received: from mail.free-electrons.com ([94.23.35.102]:51522 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933875Ab3GETev (ORCPT ); Fri, 5 Jul 2013 15:34:51 -0400 From: Maxime Ripard To: John Stultz , Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Emilio Lopez , kevin.z.m.zh@gmail.com, sunny@allwinnertech.com, shuge@allwinnertech.com, linux-sunxi@googlegroups.com, Maxime Ripard Subject: [PATCHv3 10/10] clocksource: sun4i: Fix bug when switching from periodic to oneshot modes Date: Fri, 5 Jul 2013 21:34:37 +0200 Message-Id: <1373052877-29366-11-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1373052877-29366-1-git-send-email-maxime.ripard@free-electrons.com> References: <1373052877-29366-1-git-send-email-maxime.ripard@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The interval was firing at was set up at probe time, and only changed in the set_next_event, and never changed back, which is not really what is expected. When enabling the periodic mode, now set an interval to tick every jiffy. Signed-off-by: Maxime Ripard --- drivers/clocksource/sun4i_timer.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c index 581e903..2b7cc31 100644 --- a/drivers/clocksource/sun4i_timer.c +++ b/drivers/clocksource/sun4i_timer.c @@ -38,6 +38,7 @@ #define TIMER_CNTVAL_REG(val) (0x10 * (val) + 0x18) static void __iomem *timer_base; +static u32 ticks_per_jiffy; /* * When we disable a timer, we need to wait at least for 2 cycles of @@ -74,7 +75,8 @@ static void sun4i_clkevt_time_start(u8 timer, bool periodic) else val |= TIMER_CTL_ONESHOT; - writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(timer)); + writel(val | TIMER_CTL_ENABLE | TIMER_CTL_RELOAD, + timer_base + TIMER_CTL_REG(timer)); } static void sun4i_clkevt_mode(enum clock_event_mode mode, @@ -83,6 +85,7 @@ static void sun4i_clkevt_mode(enum clock_event_mode mode, switch (mode) { case CLOCK_EVT_MODE_PERIODIC: sun4i_clkevt_time_stop(0); + sun4i_clkevt_time_setup(0, ticks_per_jiffy); sun4i_clkevt_time_start(0, true); break; case CLOCK_EVT_MODE_ONESHOT: @@ -170,7 +173,9 @@ static void __init sun4i_timer_init(struct device_node *node) writel(clk_get_rate(clk) / HZ, timer_base + TIMER_INTVAL_REG(0)); - writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M) | TIMER_CTL_RELOAD, + ticks_per_jiffy = DIV_ROUND_UP(clk_get_rate(clk), HZ); + + writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M), timer_base + TIMER_CTL_REG(0)); ret = setup_irq(irq, &sun4i_timer_irq); -- 1.8.3.2