public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: Jisheng Zhang <jszhang@kernel.org>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Samuel Holland <samuel.holland@sifive.com>
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: [PATCH v2 3/3] clocksource/drivers/timer-clint: Add set_state_oneshot_stopped
Date: Sat,  6 Apr 2024 19:17:57 +0800	[thread overview]
Message-ID: <20240406111757.1597-4-jszhang@kernel.org> (raw)
In-Reply-To: <20240406111757.1597-1-jszhang@kernel.org>

To avoid spurious timer interrupts when KTIME_MAX is used, we need to
configure set_state_oneshot_stopped(). Although implementing this is
optional, it still affects things like power management for the extra
timer interrupt.

Check commit 8fff52fd5093 ("clockevents: Introduce
CLOCK_EVT_STATE_ONESHOT_STOPPED state") for more information.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/clocksource/timer-clint.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c
index 1c17eff9861e..f468fa8bf5f0 100644
--- a/drivers/clocksource/timer-clint.c
+++ b/drivers/clocksource/timer-clint.c
@@ -134,6 +134,7 @@ static DEFINE_PER_CPU(struct clock_event_device, clint_clock_event) = {
 	.rating				= 100,
 	.set_next_event			= clint_clock_next_event,
 	.set_state_shutdown		= clint_clock_shutdown,
+	.set_state_oneshot_stopped	= clint_clock_shutdown,
 };
 
 static int clint_timer_starting_cpu(unsigned int cpu)
-- 
2.43.0


      parent reply	other threads:[~2024-04-06 11:31 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-06 11:17 [PATCH v2 0/3] clocksouce/timer-clint|riscv: some improvements Jisheng Zhang
2024-04-06 11:17 ` [PATCH v2 1/3] clocksource/drivers/timer-riscv: Add set_state_oneshot_stopped Jisheng Zhang
2024-04-06 11:17 ` [PATCH v2 2/3] clocksource/drivers/timer-clint: Add set_state_shutdown Jisheng Zhang
2024-04-06 11:17 ` Jisheng Zhang [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20240406111757.1597-4-jszhang@kernel.org \
    --to=jszhang@kernel.org \
    --cc=aou@eecs.berkeley.edu \
    --cc=daniel.lezcano@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=palmer@dabbelt.com \
    --cc=paul.walmsley@sifive.com \
    --cc=samuel.holland@sifive.com \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox