From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754970Ab3LJQJw (ORCPT ); Tue, 10 Dec 2013 11:09:52 -0500 Received: from am1ehsobe005.messaging.microsoft.com ([213.199.154.208]:3267 "EHLO am1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753840Ab3LJQJp (ORCPT ); Tue, 10 Dec 2013 11:09:45 -0500 X-Forefront-Antispam-Report: CIP:66.35.236.232;KIP:(null);UIP:(null);IPV:NLI;H:SJ-ITEXEDGE02.altera.priv.altera.com;RD:none;EFVD:NLI X-SpamScore: 8 X-BigFish: VS8(zzzz1f42h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h2189h1d1ah1d2ah1fc6hzz1de098h8275bh1de097hz2fh2a8h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h14ddh1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah224fh1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e1dh1e23h1fe8h1ff5h2218h2216h226dh22d0h2327h2336h286p1155h) From: To: , , , CC: , , , , Dinh Nguyen Subject: [PATCHv5 1/2] clocksource: dw_apb_timer_of: Fix read_sched_clock Date: Tue, 10 Dec 2013 10:07:57 -0600 Message-ID: <1386691678-29618-1-git-send-email-dinguyen@altera.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: altera.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dinh Nguyen The read_sched_clock should return the ~value because the clock is a countdown implementation. read_sched_clock() should be the same as __apbt_read_clocksource(). Signed-off-by: Dinh Nguyen --- v5: Split up into 2 patches v4: Simplify the fix by simply returning ~__raw_readl(sched_io_base) v3: Use APBTMR_N_CURRENT_VALUE define in read_sched_clock() v2: Maintain backwards compatibility for "dw-apb-timer-sp" and "dw-apb-timer-osc". --- drivers/clocksource/dw_apb_timer_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index 45ba8ae..b29d7cd 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -108,7 +108,7 @@ static void __init add_clocksource(struct device_node *source_timer) static u64 read_sched_clock(void) { - return __raw_readl(sched_io_base); + return ~__raw_readl(sched_io_base); } static const struct of_device_id sptimer_ids[] __initconst = { -- 1.7.9.5