From patchwork Sat Apr 6 11:17:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 13619780 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8F383C67861 for ; Sat, 6 Apr 2024 11:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Q30epaVw63ETitJ8gVP7p+huaxV7XiKtrP45smsoFg0=; b=pysXt8nt8eE16c T7jAYaSf3r2xietnfMyHXd9c9ANL463JktReIrriGc+k9L9pKZlskUkQACwyTn8HLsdmGkc2beIP+ j6ddZDpZPsgFjE8i9AwGS3882cCv6WwqaZ8W6k01L3z7nZz5PDsJ4tadA4kYo9Vo+Kbrw1p8ApHyG 0WqkxnN4bZIfXcltgX5tNipdxrUCkpVllWOMm8cnI3hyYzBXnw1hL4kahNw4XFCAxHClYhUtCU5FD T1TF8CO00y++jobL1blabDf2P05ZRehHEFDbcWDXIm/bP27NTneexThVgkbuGssDWeh1Iv/CP2D1x 8bhUqNBZGBUawPK0W1Cw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rt4Gc-0000000ACy7-3O66; Sat, 06 Apr 2024 11:31:26 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rt4GZ-0000000ACw3-1V3I for linux-riscv@lists.infradead.org; Sat, 06 Apr 2024 11:31:24 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 358D8CE19BE; Sat, 6 Apr 2024 11:31:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D00C9C43390; Sat, 6 Apr 2024 11:31:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712403080; bh=kxw8lEOeXnx/duF9z7ST9TT/zC6EoGrvtJe8oJFI1B0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kD+KtTXj/GBjQUtr6D1v/myTGzsq973TWGwuzcxWDl6/CjFmbP50gM/JVNX58qrgd EUcASu06PHK5jfQ3QNBfcSNrsLpU7hjW9xVTzsUQ8BCdx59mBulPvueYfkwwhZh1D3 Ro4Cs/FOBTRN2zGolCo9LGk43zQhmZC/ZB4Rs4/PXyJS0X35Gg8HyttKhBQHaT3erO PhwZfs16AI77tZ+6Py0jXcj9ZcBwMwW/U+hAbUGaslrA9P4Owjs/jFxLQmXH62SGvh DOVmIxFb0qf+tnmLIuXObaJkPONg1btiKj9dDq/7L+WYYej7XRoQ4vdH8MUDWbgsXP +8m3vR/9SczOQ== From: Jisheng Zhang To: Daniel Lezcano , Thomas Gleixner , Paul Walmsley , Palmer Dabbelt , Albert Ou , Samuel Holland Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v2 1/3] clocksource/drivers/timer-riscv: Add set_state_oneshot_stopped Date: Sat, 6 Apr 2024 19:17:55 +0800 Message-ID: <20240406111757.1597-2-jszhang@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240406111757.1597-1-jszhang@kernel.org> References: <20240406111757.1597-1-jszhang@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240406_043123_608702_BC4B7F49 X-CRM114-Status: GOOD ( 10.54 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.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 --- drivers/clocksource/timer-riscv.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c index 48ce50c5f5e6..e661fc037337 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -69,11 +69,12 @@ static int riscv_clock_shutdown(struct clock_event_device *evt) static unsigned int riscv_clock_event_irq; static DEFINE_PER_CPU(struct clock_event_device, riscv_clock_event) = { - .name = "riscv_timer_clockevent", - .features = CLOCK_EVT_FEAT_ONESHOT, - .rating = 100, - .set_next_event = riscv_clock_next_event, - .set_state_shutdown = riscv_clock_shutdown, + .name = "riscv_timer_clockevent", + .features = CLOCK_EVT_FEAT_ONESHOT, + .rating = 100, + .set_next_event = riscv_clock_next_event, + .set_state_shutdown = riscv_clock_shutdown, + .set_state_oneshot_stopped = riscv_clock_shutdown, }; /*