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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id r11sm509642pjd.52.2020.11.30.14.42.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 14:42:16 -0800 (PST) Date: Mon, 30 Nov 2020 15:42:14 -0700 From: Mathieu Poirier To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, mike.leach@linaro.org, linux-kernel@vger.kernel.org, anshuman.khandual@arm.com, jonathan.zhouwen@huawei.com, coresight@lists.linaro.org Subject: Re: [PATCH v4 18/25] coresight: etm4x: Expose trcdevarch via trcidr Message-ID: <20201130224214.GL1092947@xps15> References: <20201119164547.2982871-1-suzuki.poulose@arm.com> <20201119164547.2982871-19-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201119164547.2982871-19-suzuki.poulose@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 19, 2020 at 04:45:40PM +0000, Suzuki K Poulose wrote: > Expose the TRCDEVARCH register via the sysfs for component > detection. Given that the TRCIDR1 may not completely identify > the ETM component and instead need to use TRCDEVARCH, expose > this via sysfs for tools to use it for identification. > > Cc: Mike Leach > Cc: Mathieu Poirier > Signed-off-by: Suzuki K Poulose > --- > drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Mathieu Poirier > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > index 009818675928..277fd5bff811 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > @@ -2395,6 +2395,7 @@ coresight_etm4x_cross_read(trcidr10, TRCIDR10); > coresight_etm4x_cross_read(trcidr11, TRCIDR11); > coresight_etm4x_cross_read(trcidr12, TRCIDR12); > coresight_etm4x_cross_read(trcidr13, TRCIDR13); > +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); > > static struct attribute *coresight_etmv4_trcidr_attrs[] = { > &dev_attr_trcidr0.attr, > @@ -2410,6 +2411,7 @@ static struct attribute *coresight_etmv4_trcidr_attrs[] = { > &dev_attr_trcidr11.attr, > &dev_attr_trcidr12.attr, > &dev_attr_trcidr13.attr, > + &dev_attr_trcdevarch.attr, > NULL, > }; > > -- > 2.24.1 >