Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753134Ab3FZVSv (ORCPT ); Wed, 26 Jun 2013 17:18:51 -0400 Received: from mail.free-electrons.com ([94.23.35.102]:51836 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753065Ab3FZVRG (ORCPT ); Wed, 26 Jun 2013 17:17:06 -0400 From: Maxime Ripard To: John Stultz , Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Emilio Lopez , kevin@allwinnertech.com, sunny@allwinnertech.com, shuge@allwinnertech.com, linux-sunxi@googlegroups.com, Maxime Ripard Subject: [PATCH 5/8] clocksource: sun4i: Factor out some timer code Date: Wed, 26 Jun 2013 23:16:58 +0200 Message-Id: <1372281421-2099-6-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1372281421-2099-1-git-send-email-maxime.ripard@free-electrons.com> References: <1372281421-2099-1-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 Content-Length: 2735 Lines: 93 The set_next_event and set_mode callbacks share a lot of common code we can easily factor to avoid duplication and mistakes. Signed-off-by: Maxime Ripard --- drivers/clocksource/sun4i_timer.c | 48 ++++++++++++++++++++++++++------------- 1 file changed, 32 insertions(+), 16 deletions(-) diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c index 032e504..7f3b248 100644 --- a/drivers/clocksource/sun4i_timer.c +++ b/drivers/clocksource/sun4i_timer.c @@ -45,24 +45,46 @@ static void __iomem *timer_base; +static void sun4i_clkevt_time_stop(void) +{ + u32 val = readl(timer_base + TIMER_CTL_REG(0)); + writel(val & ~TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0)); + udelay(1); +} + +static void sun4i_clkevt_time_setup(unsigned long delay) +{ + writel(delay, timer_base + TIMER_INTVAL_REG(0)); +} + +static void sun4i_clkevt_time_start(bool periodic) +{ + u32 val = readl(timer_base + TIMER_CTL_REG(0)); + + if (periodic) + val &= ~TIMER_CTL_ONESHOT; + else + val |= TIMER_CTL_ONESHOT; + + writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0)); +} + static void sun4i_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *clk) { - u32 u = readl(timer_base + TIMER_CTL_REG(0)); - switch (mode) { case CLOCK_EVT_MODE_PERIODIC: - u &= ~(TIMER_CTL_ONESHOT); - writel(u | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0)); + sun4i_clkevt_time_stop(); + sun4i_clkevt_time_start(true); break; - case CLOCK_EVT_MODE_ONESHOT: - writel(u | TIMER_CTL_ONESHOT, timer_base + TIMER_CTL_REG(0)); + sun4i_clkevt_time_stop(); + sun4i_clkevt_time_start(false); break; case CLOCK_EVT_MODE_UNUSED: case CLOCK_EVT_MODE_SHUTDOWN: default: - writel(u & ~(TIMER_CTL_ENABLE), timer_base + TIMER_CTL_REG(0)); + sun4i_clkevt_time_stop(); break; } } @@ -70,15 +92,9 @@ static void sun4i_clkevt_mode(enum clock_event_mode mode, static int sun4i_clkevt_next_event(unsigned long evt, struct clock_event_device *unused) { - u32 val = readl(timer_base + TIMER_CTL_REG(0)); - writel(val & ~TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG(0)); - udelay(1); - - writel(evt, timer_base + TIMER_INTVAL_REG(0)); - - val = readl(timer_base + TIMER_CTL_REG(0)); - writel(val | TIMER_CTL_ENABLE | TIMER_CTL_AUTORELOAD, - timer_base + TIMER_CTL_REG(0)); + sun4i_clkevt_time_stop(); + sun4i_clkevt_time_setup(evt); + sun4i_clkevt_time_start(false); return 0; } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/