From: tip-bot for Daniel Lezcano <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: alexandre.torgue@st.com, daniel.lezcano@linaro.org,
peterz@infradead.org, mcoquelin.stm32@gmail.com, hpa@zytor.com,
torvalds@linux-foundation.org, tglx@linutronix.de,
benjamin.gaignard@st.com, mingo@kernel.org,
linux-kernel@vger.kernel.org
Subject: [tip:timers/core] clocksource/drivers/stm32: Add the timer delay callback
Date: Mon, 8 Jan 2018 09:33:53 -0800 [thread overview]
Message-ID: <tip-81abdbbffd69fecdac37fe1d2b44a21227ee23d4@git.kernel.org> (raw)
In-Reply-To: <1515418139-23276-19-git-send-email-daniel.lezcano@linaro.org>
Commit-ID: 81abdbbffd69fecdac37fe1d2b44a21227ee23d4
Gitweb: https://git.kernel.org/tip/81abdbbffd69fecdac37fe1d2b44a21227ee23d4
Author: Daniel Lezcano <daniel.lezcano@linaro.org>
AuthorDate: Mon, 8 Jan 2018 14:28:58 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 8 Jan 2018 17:57:26 +0100
clocksource/drivers/stm32: Add the timer delay callback
Add the timer delay callback, that saves us ~90ms of boot time.
Tested-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1515418139-23276-19-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
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 21b7492..c7d1dae 100644
--- a/drivers/clocksource/timer-stm32.c
+++ b/drivers/clocksource/timer-stm32.c
@@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
+#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/of.h>
@@ -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,
next prev parent reply other threads:[~2018-01-08 17:38 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-08 13:27 [PULL] clockevents for 4.16 Daniel Lezcano
2018-01-08 13:28 ` [PATCH 01/20] dt-bindings: timer: Add Actions Semi S700 Daniel Lezcano
2018-01-08 13:28 ` [PATCH 02/20] clocksource/drivers/owl: Adopt TIMER_OF_DECLARE() Daniel Lezcano
2018-01-08 13:28 ` [PATCH 03/20] clocksource/drivers/owl: Add the S700 Daniel Lezcano
2018-01-08 13:28 ` [PATCH 04/20] clocksource/drivers/tcb_clksrc: Fix clock speed message Daniel Lezcano
2018-01-08 17:27 ` [tip:timers/core] " tip-bot for Romain Izard
2018-01-08 13:28 ` [PATCH 05/20] clocksource/drivers/timer-of: Fix function names Daniel Lezcano
2018-01-08 17:27 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 06/20] clocksource/drivers/timer-of: Add kernel documentation Daniel Lezcano
2018-01-08 17:28 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 07/20] dt-bindings: clocksource: Add Spreadtrum SC9860 timer Daniel Lezcano
2018-01-08 17:28 ` [tip:timers/core] dt-bindings/clocksource: Add Spreadtrum SC9860 timer documentation tip-bot for Baolin Wang
2018-01-08 13:28 ` [PATCH 08/20] clocksource/drivers/spreadtrum: Add timer driver for Spreadtrum SC9860 platform Daniel Lezcano
2018-01-08 17:29 ` [tip:timers/core] clocksource/drivers/spreadtrum: Add timer driver for the " tip-bot for Baolin Wang
2018-01-08 13:28 ` [PATCH 09/20] clocksource/drivers/timer-of: Store the device node pointer Daniel Lezcano
2018-01-08 17:29 ` [tip:timers/core] clocksource/drivers/timer-of: Store the device node pointer in 'struct timer_of' tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 10/20] clocksource/drivers/timer-of: Don't request the resource by name Daniel Lezcano
2018-01-08 17:30 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 11/20] clocksource/drivers/stm32: Fix kernel panic with multiple timers Daniel Lezcano
2018-01-08 17:30 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 12/20] clocksource/drivers/stm32: Convert the driver to timer-of Daniel Lezcano
2018-01-08 17:30 ` [tip:timers/core] clocksource/drivers/stm32: Convert the driver to timer_of primitives tip-bot for Benjamin Gaignard
2018-01-08 13:28 ` [PATCH 13/20] clocksource/drivers/stm32: Use the node name as timer name Daniel Lezcano
2018-01-08 17:31 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 14/20] clocksource/drivers/stm32: Encapsulate the timer width sorting out function Daniel Lezcano
2018-01-08 17:31 ` [tip:timers/core] clocksource/drivers/stm32: Factor out the timer width sorting code tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 15/20] clocksource/drivers/stm32: Compute a prescaler value with a targeted rate Daniel Lezcano
2018-01-08 17:32 ` [tip:timers/core] " tip-bot for Benjamin Gaignard
2018-01-08 13:28 ` [PATCH 16/20] clocksource/drivers/stm32: Add the oneshot mode Daniel Lezcano
2018-01-08 17:32 ` [tip:timers/core] clocksource/drivers/stm32: Add " tip-bot for Benjamin Gaignard
2018-01-08 13:28 ` [PATCH 17/20] clocksource/drivers/stm32: Encapsulate more the clockevent code Daniel Lezcano
2018-01-08 17:33 ` [tip:timers/core] clocksource/drivers/stm32: Factor out more of " tip-bot for Daniel Lezcano
2018-01-08 13:28 ` [PATCH 18/20] clocksource/drivers/stm32: Add the clocksource Daniel Lezcano
2018-01-08 17:33 ` [tip:timers/core] clocksource/drivers/stm32: Add clocksource functionality tip-bot for Benjamin Gaignard
2018-01-08 13:28 ` [PATCH 19/20] clocksource/drivers/stm32: Add the timer delay Daniel Lezcano
2018-01-08 17:33 ` tip-bot for Daniel Lezcano [this message]
2018-01-08 13:28 ` [PATCH 20/20] clocksource/drivers/stm32: Start the timer's counter sooner Daniel Lezcano
2018-01-08 17:34 ` [tip:timers/core] " tip-bot for Daniel Lezcano
2018-01-08 16:58 ` [PULL] clockevents for 4.16 Ingo Molnar
2018-01-08 17:07 ` Daniel Lezcano
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