Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756820Ab2KOKE3 (ORCPT ); Thu, 15 Nov 2012 05:04:29 -0500 Received: from mail-wi0-f178.google.com ([209.85.212.178]:45456 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756787Ab2KOKEY (ORCPT ); Thu, 15 Nov 2012 05:04:24 -0500 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: arnd@arndb.de, linus.walleij@stericsson.com, jonas.aberg@stericsson.com, linux@arm.linux.org.uk, will.deacon@arm.com, Lee Jones Subject: [PATCH 2/2] clocksource: clksrc-dbx500-prcmu: Add boottime support Date: Thu, 15 Nov 2012 10:04:07 +0000 Message-Id: <1352973847-21605-3-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1352973847-21605-1-git-send-email-lee.jones@linaro.org> References: <1352973847-21605-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1948 Lines: 63 Create a call-back to provide boottime functionality with a means to gain access to CPU run time information. This call-back will be invoked numerous times during system boot in order to obtain and log various time increments throughout the booting process precisely. Based heavily on the original driver by Jonas Aaberg. Signed-off-by: Lee Jones --- drivers/clocksource/clksrc-dbx500-prcmu.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksource/clksrc-dbx500-prcmu.c index c26c369..0069cd9 100644 --- a/drivers/clocksource/clksrc-dbx500-prcmu.c +++ b/drivers/clocksource/clksrc-dbx500-prcmu.c @@ -14,6 +14,7 @@ */ #include #include +#include #include @@ -68,6 +69,23 @@ static u32 notrace dbx500_prcmu_sched_clock_read(void) #endif +#ifdef CONFIG_BOOTTIME +static unsigned long __init boottime_get_time(void) +{ + return div_s64(clocksource_cyc2ns(clocksource_dbx500_prcmu.read( + &clocksource_dbx500_prcmu), + clocksource_dbx500_prcmu.mult, + clocksource_dbx500_prcmu.shift), + 1000); +} + +static struct boottime_timer __initdata boottime_timer = { + .init = NULL, + .get_time = boottime_get_time, + .finalize = NULL, +}; +#endif + void __init clksrc_dbx500_prcmu_init(void __iomem *base) { clksrc_dbx500_timer_base = base; @@ -90,4 +108,6 @@ void __init clksrc_dbx500_prcmu_init(void __iomem *base) 32, RATE_32K); #endif clocksource_register_hz(&clocksource_dbx500_prcmu, RATE_32K); + + boottime_activate(&boottime_timer); } -- 1.7.9.5 -- 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/