From patchwork Thu Dec 3 21:04:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 57670 Delivered-To: patch@linaro.org Received: by 10.112.155.196 with SMTP id vy4csp166237lbb; Thu, 3 Dec 2015 13:05:51 -0800 (PST) X-Received: by 10.98.15.68 with SMTP id x65mr16496673pfi.146.1449176749350; Thu, 03 Dec 2015 13:05:49 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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[184.64.168.246]) by smtp.gmail.com with ESMTPSA id d81sm3615433ioj.12.2015.12.03.13.05.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 03 Dec 2015 13:05:37 -0800 (PST) From: Mathieu Poirier To: gregkh@linuxfoundation.org, alexander.shishkin@linux.intel.com Cc: zhang.chunyan@linaro.org, mike.leach@arm.com, tor@ti.com, al.grant@arm.com, fainelli@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Mathieu Poirier Subject: [PATCH V6 10/26] coresight: etm3x: set progbit to stop trace collection Date: Thu, 3 Dec 2015 14:04:46 -0700 Message-Id: <1449176702-13213-11-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1449176702-13213-1-git-send-email-mathieu.poirier@linaro.org> References: <1449176702-13213-1-git-send-email-mathieu.poirier@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is no need to use the event enable's "always false" event to stop trace collection. For that purpose setting the programming bit (ETMCR:10) is enough. Signed-off-by: Mathieu Poirier --- drivers/hwtracing/coresight/coresight-etm3x.c | 3 --- 1 file changed, 3 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 0035953a1102..a0252ffb4ba7 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -422,9 +422,6 @@ static void etm_disable_hw(void *info) CS_UNLOCK(drvdata->base); etm_set_prog(drvdata); - /* Program trace enable to low by using always false event */ - etm_writel(drvdata, ETM_HARD_WIRE_RES_A | ETM_EVENT_NOT_A, ETMTEEVR); - /* Read back sequencer and counters for post trace analysis */ config->seq_curr_state = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);