From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753561AbaEWKmv (ORCPT ); Fri, 23 May 2014 06:42:51 -0400 Received: from mail-wg0-f49.google.com ([74.125.82.49]:52355 "EHLO mail-wg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752468AbaEWKmt (ORCPT ); Fri, 23 May 2014 06:42:49 -0400 From: Daniel Lezcano To: tglx@linutronix.de, mingo@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/2] clocksource: tcb_clksrc: Make tc_mode interrupt safe Date: Fri, 23 May 2014 12:43:00 +0200 Message-Id: <1400841780-7119-2-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1400841780-7119-1-git-send-email-daniel.lezcano@linaro.org> References: <537F2589.5050807@linaro.org> <1400841780-7119-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Jander tc_mode() can be called from interrupt context and thus must not call clk_*prepare*() functions. Signed-off-by: David Jander Signed-off-by: Daniel Lezcano Acked-by: Alexandre Belloni Acked-by: Nicolas Ferre --- drivers/clocksource/tcb_clksrc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c index 00fdd11..a8d7ea1 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/tcb_clksrc.c @@ -100,7 +100,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) || tcd->clkevt.mode == CLOCK_EVT_MODE_ONESHOT) { __raw_writel(0xff, regs + ATMEL_TC_REG(2, IDR)); __raw_writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR)); - clk_disable_unprepare(tcd->clk); + clk_disable(tcd->clk); } switch (m) { @@ -109,7 +109,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) * of oneshot, we get lower overhead and improved accuracy. */ case CLOCK_EVT_MODE_PERIODIC: - clk_prepare_enable(tcd->clk); + clk_enable(tcd->clk); /* slow clock, count up to RC, then irq and restart */ __raw_writel(timer_clock @@ -126,7 +126,7 @@ static void tc_mode(enum clock_event_mode m, struct clock_event_device *d) break; case CLOCK_EVT_MODE_ONESHOT: - clk_prepare_enable(tcd->clk); + clk_enable(tcd->clk); /* slow clock, count up to RC, then irq and stop */ __raw_writel(timer_clock | ATMEL_TC_CPCSTOP @@ -194,7 +194,7 @@ static int __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) ret = clk_prepare_enable(t2_clk); if (ret) return ret; - clk_disable_unprepare(t2_clk); + clk_disable(t2_clk); clkevt.regs = tc->regs; clkevt.clk = t2_clk; -- 1.7.9.5