Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933464AbeAHNa0 (ORCPT + 1 other); Mon, 8 Jan 2018 08:30:26 -0500 Received: from mail-wm0-f68.google.com ([74.125.82.68]:46567 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933419AbeAHN36 (ORCPT ); Mon, 8 Jan 2018 08:29:58 -0500 X-Google-Smtp-Source: ACJfBov77XzmGmfgsCPegbctdGtVhdzRZTmjStCbwm2KfRTbwa3Upr8HCaRlX50KI8Qpb0i985JvTw== From: Daniel Lezcano To: tglx@linutronix.de Cc: linux-kernel@vger.kernel.org, Benjamin Gaignard , Maxime Coquelin , Alexandre Torgue , linux-arm-kernel@lists.infradead.org (moderated list:ARM/STM32 ARCHITECTURE) Subject: [PATCH 19/20] clocksource/drivers/stm32: Add the timer delay Date: Mon, 8 Jan 2018 14:28:58 +0100 Message-Id: <1515418139-23276-19-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1515418139-23276-1-git-send-email-daniel.lezcano@linaro.org> References: <1bbaef2e-4080-3f54-7db3-a8989acfd691@free.fr> <1515418139-23276-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Add the timer delay, that saves us ~90ms of boot time. Signed-off-by: Daniel Lezcano Tested-by: Benjamin Gaignard Acked-by: Benjamin Gaignard --- drivers/clocksource/timer-stm32.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/clocksource/timer-stm32.c b/drivers/clocksource/timer-stm32.c index 4634f4d..dcf8445 100644 --- a/drivers/clocksource/timer-stm32.c +++ b/drivers/clocksource/timer-stm32.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -88,6 +89,13 @@ static u64 notrace stm32_read_sched_clock(void) return readl_relaxed(stm32_timer_cnt); } +static struct delay_timer stm32_timer_delay; + +static unsigned long stm32_read_delay(void) +{ + return readl_relaxed(stm32_timer_cnt); +} + static void stm32_clock_event_disable(struct timer_of *to) { writel_relaxed(0, timer_of_base(to) + TIM_DIER); @@ -230,6 +238,11 @@ static int __init stm32_clocksource_init(struct timer_of *to) stm32_timer_cnt = timer_of_base(to) + TIM_CNT; sched_clock_register(stm32_read_sched_clock, bits, timer_of_rate(to)); pr_info("%s: STM32 sched_clock registered\n", name); + + stm32_timer_delay.read_current_timer = stm32_read_delay; + stm32_timer_delay.freq = timer_of_rate(to); + register_current_timer_delay(&stm32_timer_delay); + pr_info("%s: STM32 delay timer registered\n", name); } return clocksource_mmio_init(timer_of_base(to) + TIM_CNT, name, -- 2.7.4