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SubjectRe: [PATCH v4 18/25] coresight: etm4x: Expose trcdevarch via trcidr
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 <mike.leach@linaro.org>
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++
> 1 file changed, 2 insertions(+)

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

>
> 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
>

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