From patchwork Wed Oct 18 06:17:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 13426428 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 162E6CDB482 for ; Wed, 18 Oct 2023 06:18:03 +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=+/FMkmfkL5JD6di29EYo5icmTfLhE6Ic901UKhMsKfo=; b=u4Z35GcpdoSwKZ UT5F0JBt68nhuCMwCtpVAwjnVqhu4PA7JeBQkNUxNqZY0PwG4t7CQ3R354VbqQIpF8zJfztya77S8 guYJXazH9OY/V93RbYDoFqa/WbXnW/6Q9Vd7BbLumzurWUeFi1iOII9pI5/lwiyuIJk5+Ucy84Y4m vmSzKMrujZYwDfwFH7nEhc2WfWWeJU5gXgZuV841gK0r2cxJWRuXgD7Cs3T4sOHUnUqxst2Zoth6d mATtzHbA9iUqdM5KA9r+GmtS2TOTBKYb8D0nAZsNBRidsSV8K4vrH6eI1mY8N/UnjqqGVZ6BDYFbZ WmUQcuH4ZbUC/IYQJqUg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qszs7-00DtIX-07; Wed, 18 Oct 2023 06:17:35 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qszrv-00Dt7t-2t for linux-arm-kernel@lists.infradead.org; Wed, 18 Oct 2023 06:17:26 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qszrs-0001Zw-JW; Wed, 18 Oct 2023 08:17:20 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qszrr-002UYQ-1l; Wed, 18 Oct 2023 08:17:19 +0200 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1qszrq-00Eviy-30; Wed, 18 Oct 2023 08:17:18 +0200 From: Sascha Hauer To: linux-rockchip@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Heiko Stuebner , Chanwoo Choi , Kyungmin Park , MyungJoo Ham , Will Deacon , Mark Rutland , kernel@pengutronix.de, Michael Riesch , Robin Murphy , Vincent Legoll , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, Sebastian Reichel , Sascha Hauer , Chanwoo Choi Subject: [PATCH v8 15/26] PM / devfreq: rockchip-dfi: give variable a better name Date: Wed, 18 Oct 2023 08:17:03 +0200 Message-Id: <20231018061714.3553817-16-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231018061714.3553817-1-s.hauer@pengutronix.de> References: <20231018061714.3553817-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231017_231723_947522_2A0BF91D X-CRM114-Status: GOOD ( 17.60 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org struct dmc_count_channel::total counts the clock cycles of the DDR controller. Rename it accordingly to give the reader a better idea what this is about. While at it, at some documentation to struct dmc_count_channel. Reviewed-by: Sebastian Reichel Acked-by: Chanwoo Choi Signed-off-by: Sascha Hauer --- drivers/devfreq/event/rockchip-dfi.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c index 7a4f1901314d4..3d5c6d737ccd9 100644 --- a/drivers/devfreq/event/rockchip-dfi.c +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -46,9 +46,14 @@ #define DDRMON_CH1_COUNT_NUM 0x3c #define DDRMON_CH1_DFI_ACCESS_NUM 0x40 +/** + * struct dmc_count_channel - structure to hold counter values from the DDR controller + * @access: Number of read and write accesses + * @clock_cycles: DDR clock cycles + */ struct dmc_count_channel { u32 access; - u32 total; + u32 clock_cycles; }; struct dmc_count { @@ -151,7 +156,7 @@ static void rockchip_dfi_read_counters(struct rockchip_dfi *dfi, struct dmc_coun continue; count->c[i].access = readl_relaxed(dfi_regs + DDRMON_CH0_DFI_ACCESS_NUM + i * 20); - count->c[i].total = readl_relaxed(dfi_regs + + count->c[i].clock_cycles = readl_relaxed(dfi_regs + DDRMON_CH0_COUNT_NUM + i * 20); } } @@ -183,29 +188,29 @@ static int rockchip_dfi_get_event(struct devfreq_event_dev *edev, struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev); struct dmc_count count; struct dmc_count *last = &dfi->last_event_count; - u32 access = 0, total = 0; + u32 access = 0, clock_cycles = 0; int i; rockchip_dfi_read_counters(dfi, &count); /* We can only report one channel, so find the busiest one */ for (i = 0; i < dfi->max_channels; i++) { - u32 a, t; + u32 a, c; if (!(dfi->channel_mask & BIT(i))) continue; a = count.c[i].access - last->c[i].access; - t = count.c[i].total - last->c[i].total; + c = count.c[i].clock_cycles - last->c[i].clock_cycles; if (a > access) { access = a; - total = t; + clock_cycles = c; } } edata->load_count = access * 4; - edata->total_count = total; + edata->total_count = clock_cycles; dfi->last_event_count = count;