linux-kernel - Re: [PATCH v1 1/3] coresight: tpda: Add sysfs node for tpda cross-trigger configuration

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Message-ID: <ef2267d2-a6f4-4f51-be44-687a4074a4d3@linaro.org>
Date: Tue, 26 Aug 2025 10:17:59 +0100
From: James Clark <james.clark@...aro.org>
To: Jie Gan <jie.gan@....qualcomm.com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 Suzuki K Poulose <suzuki.poulose@....com>, Mike Leach
 <mike.leach@...aro.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Tingwei Zhang <tingwei.zhang@....qualcomm.com>
Subject: Re: [PATCH v1 1/3] coresight: tpda: Add sysfs node for tpda
 cross-trigger configuration



On 26/08/2025 8:01 am, Jie Gan wrote:
> From: Tao Zhang <tao.zhang@....qualcomm.com>
> 
> Introduce sysfs nodes to configure cross-trigger parameters for TPDA.
> These registers define the characteristics of cross-trigger packets,
> including generation frequency and flag values.
> 
> Signed-off-by: Tao Zhang <tao.zhang@....qualcomm.com>
> Co-developed-by: Jie Gan <jie.gan@....qualcomm.com>
> Signed-off-by: Jie Gan <jie.gan@....qualcomm.com>
> ---
>   .../testing/sysfs-bus-coresight-devices-tpda  |  43 ++++
>   drivers/hwtracing/coresight/coresight-tpda.c  | 241 ++++++++++++++++++
>   drivers/hwtracing/coresight/coresight-tpda.h  |  27 ++
>   3 files changed, 311 insertions(+)
>   create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda
> 
[...]
> +#define TPDA_FPID_CR		(0x084)
> +
> +/* Cross trigger FREQ packets timestamp bit */
> +#define TPDA_CR_FREQTS		BIT(2)
> +/* Cross trigger FREQ packet request bit */
> +#define TPDA_CR_FRIE		BIT(3)
> +/* Cross trigger FLAG packet request interface bit */
> +#define TPDA_CR_FLRIE		BIT(4)
> +/* Cross trigger synchronization bit */
> +#define TPDA_CR_SRIE		BIT(5)
> +/* Packetize CMB/MCMB traffic bit */
> +#define TPDA_CR_CMBCHANMODE	BIT(20)
> +
>   /* Aggregator port enable bit */
>   #define TPDA_Pn_CR_ENA		BIT(0)
>   /* Aggregator port CMB data set element size bit */
>   #define TPDA_Pn_CR_CMBSIZE		GENMASK(7, 6)
>   /* Aggregator port DSB data set element size bit */
>   #define TPDA_Pn_CR_DSBSIZE		BIT(8)
> +/* Mode control bit */
> +#define TPDA_MODE_CTRL			BIT(12)
>   

This one is missing the register name prefix, like TPDA_SYNCR_MODE_CTRL