linux-kernel - [tip: timers/core] clocksource/drivers/timer-sun4i: Add CLOCK_EVT_FEAT

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Date:   Mon, 13 Feb 2023 18:26:21 -0000
From:   "tip-bot2 for Yangtao Li" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Yangtao Li <frank.li@...o.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: timers/core] clocksource/drivers/timer-sun4i: Add CLOCK_EVT_FEAT_DYNIRQ

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     5ccb51b06c8bfcfca99d3f68e671eead7318301d
Gitweb:        https://git.kernel.org/tip/5ccb51b06c8bfcfca99d3f68e671eead7318301d
Author:        Yangtao Li <frank.li@...o.com>
AuthorDate:    Thu, 09 Feb 2023 12:02:39 +08:00
Committer:     Daniel Lezcano <daniel.lezcano@...aro.org>
CommitterDate: Mon, 13 Feb 2023 13:10:17 +01:00

clocksource/drivers/timer-sun4i: Add CLOCK_EVT_FEAT_DYNIRQ

Add CLOCK_EVT_FEAT_DYNIRQ to allow the IRQ could be runtime set affinity
to the cores that needs wake up, otherwise saying core0 has to send
IPI to wakeup core1. With CLOCK_EVT_FEAT_DYNIRQ set, when broadcast
timer could wake up the cores, IPI is not needed.

After enabling this feature, especially the scene where cpuidle is
enabled can benefit.

Signed-off-by: Yangtao Li <frank.li@...o.com>
Link: https://lore.kernel.org/r/20230209040239.24710-1-frank.li@vivo.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/clocksource/timer-sun4i.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-sun4i.c b/drivers/clocksource/timer-sun4i.c
index e5a70aa..7bdcc60 100644
--- a/drivers/clocksource/timer-sun4i.c
+++ b/drivers/clocksource/timer-sun4i.c
@@ -144,7 +144,8 @@ static struct timer_of to = {
 	.clkevt = {
 		.name = "sun4i_tick",
 		.rating = 350,
-		.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+		.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
+				CLOCK_EVT_FEAT_DYNIRQ,
 		.set_state_shutdown = sun4i_clkevt_shutdown,
 		.set_state_periodic = sun4i_clkevt_set_periodic,
 		.set_state_oneshot = sun4i_clkevt_set_oneshot,