Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751135AbbLTWlT (ORCPT ); Sun, 20 Dec 2015 17:41:19 -0500 Received: from fallback5.mail.ru ([94.100.181.253]:53916 "EHLO fallback5.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750768AbbLTWlS (ORCPT ); Sun, 20 Dec 2015 17:41:18 -0500 X-Greylist: delayed 761 seconds by postgrey-1.27 at vger.kernel.org; Sun, 20 Dec 2015 17:41:18 EST From: Roman Volkov To: Tony Prisk Cc: Daniel Lezcano , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Roman Volkov Subject: [PATCH 3/4] clocksource/vt8500: Use MIN_OSCR_DELTA from PXA Date: Mon, 21 Dec 2015 01:28:11 +0300 Message-Id: <1450650492-18996-4-git-send-email-v1ron@mail.ru> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1450650492-18996-1-git-send-email-v1ron@mail.ru> References: <1450650492-18996-1-git-send-email-v1ron@mail.ru> X-Mras: Ok Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1904 Lines: 53 From: Roman Volkov Since vt8500 and PXA timers are identical, use MIN_OSCR_DELTA from PXA, which is bigger than existing value. It is required to determine the minimum delay which hardware can generate. This commit fixes vt8500 breakage in Linux 4.2 introduced by c6eb3f7 ('hrtimer: Get rid of hrtimer softirq') Signed-off-by: Roman Volkov --- drivers/clocksource/vt8500_timer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c index f40ded8..7649852 100644 --- a/drivers/clocksource/vt8500_timer.c +++ b/drivers/clocksource/vt8500_timer.c @@ -51,6 +51,8 @@ #define timer_readl(addr) readl_relaxed(regbase + addr) #define timer_writel(v, addr) writel_relaxed(v, regbase + addr) +#define MIN_OSCR_DELTA 16 + static void __iomem *regbase; static cycle_t vt8500_timer_read(struct clocksource *cs) @@ -78,7 +80,7 @@ static int vt8500_timer_set_next_event(unsigned long cycles, cpu_relax(); timer_writel((unsigned long)alarm, TIMER_MATCH_VAL); - if ((signed)(alarm - clocksource.read(&clocksource)) <= 16) + if ((signed)(alarm - clocksource.read(&clocksource)) <= MIN_OSCR_DELTA) return -ETIME; timer_writel(1, TIMER_IER_VAL); @@ -149,7 +151,7 @@ static void __init vt8500_timer_init(struct device_node *np) pr_err("%s: setup_irq failed for %s\n", __func__, clockevent.name); clockevents_config_and_register(&clockevent, VT8500_TIMER_HZ, - 4, 0xf0000000); + MIN_OSCR_DELTA * 2, 0xf0000000); } CLOCKSOURCE_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init); -- 2.6.2 -- 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/