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Message-Id: <20190425195310.31562-16-mathieu.poirier@linaro.org> Date: Thu, 25 Apr 2019 13:52:53 -0600 From: Mathieu Poirier <mathieu.poirier@...aro.org> To: gregkh@...uxfoundation.org Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 15/32] coresight: etm4x: Skip selector pair 0 Resource selector pair 0 is always implemented and reserved. As such it should not be explicitly programmed. Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com> Tested-by: Leo Yan <leo.yan@...aro.org> Tested-by: Robert Walker <robert.walker@....com> --- drivers/hwtracing/coresight/coresight-etm4x.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c index 732ae12fca9b..d64192c29860 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.c +++ b/drivers/hwtracing/coresight/coresight-etm4x.c @@ -138,8 +138,11 @@ static int etm4_enable_hw(struct etmv4_drvdata *drvdata) drvdata->base + TRCCNTVRn(i)); } - /* Resource selector pair 0 is always implemented and reserved */ - for (i = 0; i < drvdata->nr_resource * 2; i++) + /* + * Resource selector pair 0 is always implemented and reserved. As + * such start at 2. + */ + for (i = 2; i < drvdata->nr_resource * 2; i++) writel_relaxed(config->res_ctrl[i], drvdata->base + TRCRSCTLRn(i)); -- 2.17.1
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