From patchwork Wed Mar 27 15:35:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jisheng Zhang X-Patchwork-Id: 13606868 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 B7353C54E67 for ; Wed, 27 Mar 2024 15:48:36 +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=VjLekSL2wjYLYewCweEUI0vM/LLTX1MuDYk1nFef1uo=; b=mZ37ZsV56VM4Xg 4i6syB2XqcfLkqryDxId42uVu2d9xBc8GVLjMPfa7iPCxoIAet6eU06keXNjHL/x8HgSyX8Y2ocRh 4WrD1SQq9fTfWzEIHgB3IbueLw6rmtbtqpPHDxR5l9K7aCRWqFz6L9nd77DZxmpLT4BvlKTwfJj4F CuLAfGgLDZuh/BB3xIPXUJae/pzu+mmAnPkI9Hl1M2g3/i/pgn6h29IHIaT37nRyr6f5d/PlfmoK0 3FROYk0+j80Xs1zfWtvrv49aQ4GWOc3OyNDdt2y1epSvNPB/e0Jj6kZy/hEBrbYcqkEmeMYAI3DJC YEshvugHF17LLtW8Tc+Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpVVw-00000009uGa-0rM3; Wed, 27 Mar 2024 15:48:32 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rpVVq-00000009uDd-3dKX for linux-riscv@lists.infradead.org; Wed, 27 Mar 2024 15:48:28 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 3DB35615D8; Wed, 27 Mar 2024 15:48:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16D24C433F1; Wed, 27 Mar 2024 15:48:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711554505; bh=G8Du/nKE3EQGqBI4paXDN1AIdNVl4glAliWu+H6P45c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rJaykR9+OUNmZr8FxTeTlU3uWMWDqdwYbp3icdv9jf2Q6hJMBgQDEBGpikt5hRtAf 6La3dI3Nq+RMa6s+5yvwewnzw/JWkIbLhukmqq88cKYBgWA56MFnJxYJhIzMCCsrT2 tdnL14om1dRM4/C9RQxh1xS4SJzqci0pX/fYmssovPrdEpAZMqbn7/lp2XLV1/dygo EysNPjAnNgZK+erhl7WXhr0hfGBWQCY+0wU14BCX9wAa3Y4YXsYbJ/pLBU+c6/WDy1 /xyzq1sIy9qXQAFVpd4QGDCQC3F/7gyOAzQzskObCZ25XfFaGsPFxoSm6YPYymed7k Blh/EcdKYg7og== From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Daniel Lezcano , Thomas Gleixner Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] clocksource/drivers/timer-clint: Add set_state_oneshot_stopped Date: Wed, 27 Mar 2024 23:35:02 +0800 Message-ID: <20240327153502.2133-4-jszhang@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240327153502.2133-1-jszhang@kernel.org> References: <20240327153502.2133-1-jszhang@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240327_084827_165055_FF43B382 X-CRM114-Status: UNSURE ( 9.32 ) X-CRM114-Notice: Please train this message. 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-clint.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c index 56cf6c672e6d..f5c04520d6b1 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)