From mboxrd@z Thu Jan 1 00:00:00 1970 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 phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4D4ECC83F2C for ; Mon, 4 Sep 2023 07:03:31 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id B6D778682B; Mon, 4 Sep 2023 09:03:29 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=andestech.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id EDC328689A; Mon, 4 Sep 2023 09:03:27 +0200 (CEST) Received: from Atcsqr.andestech.com (60-248-80-70.hinet-ip.hinet.net [60.248.80.70]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 1A28386415 for ; Mon, 4 Sep 2023 09:03:24 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=andestech.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=ycliang@andestech.com Received: from mail.andestech.com (ATCPCS16.andestech.com [10.0.1.222]) by Atcsqr.andestech.com with ESMTP id 38473HYa023645; Mon, 4 Sep 2023 15:03:17 +0800 (+08) (envelope-from ycliang@andestech.com) Received: from swlinux02 (10.0.15.183) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.498.0; Mon, 4 Sep 2023 15:03:16 +0800 Date: Mon, 4 Sep 2023 15:02:24 +0800 From: Leo Liang To: Chanho Park CC: Rick Chen , Simon Glass , Subject: Re: [PATCH v2 3/3] timer: riscv_aclint_timer: add timer_get_boot_us for BOOTSTAGE Message-ID: References: <20230828094938.2061606-1-chanho61.park@samsung.com> <20230828094938.2061606-4-chanho61.park@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20230828094938.2061606-4-chanho61.park@samsung.com> User-Agent: Mutt/2.2.10 (e0e92c31) (2023-03-25) X-Originating-IP: [10.0.15.183] X-DNSRBL: X-MAIL: Atcsqr.andestech.com 38473HYa023645 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Hi Chanho, On Mon, Aug 28, 2023 at 06:49:38PM +0900, Chanho Park wrote: > timer_get_boot_us function is required to record the boot stages as > us-based timestamp. > > Signed-off-by: Chanho Park > --- > drivers/timer/riscv_aclint_timer.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/drivers/timer/riscv_aclint_timer.c b/drivers/timer/riscv_aclint_timer.c > index e29d527c8d77..8b67745bb4a2 100644 > --- a/drivers/timer/riscv_aclint_timer.c > +++ b/drivers/timer/riscv_aclint_timer.c > @@ -6,6 +6,7 @@ > > #include > #include > +#include > #include > #include > #include > @@ -44,6 +45,27 @@ u64 notrace timer_early_get_count(void) > } > #endif > > +#if CONFIG_IS_ENABLED(RISCV_MMODE) && CONFIG_IS_ENABLED(BOOTSTAGE) > +ulong timer_get_boot_us(void) > +{ > + int ret; > + u64 ticks = 0; > + u32 rate; > + > + ret = dm_timer_init(); > + if (!ret) { > + rate = timer_get_rate(gd->timer); > + timer_get_count(gd->timer, &ticks); > + } else { > + rate = RISCV_MMODE_TIMER_FREQ; > + ticks = readq((void __iomem *)MTIME_REG(RISCV_MMODE_TIMERBASE, > + RISCV_MMODE_TIMEROFF)); > + } > + > + return lldiv(ticks * 1001, (rate / 1000)); Why is this dividend 1001 ? Best regards, Leo > +} > +#endif > + > static const struct timer_ops riscv_aclint_timer_ops = { > .get_count = riscv_aclint_timer_get_count, > }; > -- > 2.39.2 >