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

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Message-ID: <2c542b10-ba75-4e75-a2cf-964edfbac52a@oss.qualcomm.com>
Date: Tue, 26 Aug 2025 17:24:40 +0800
From: Jie Gan <jie.gan@....qualcomm.com>
To: James Clark <james.clark@...aro.org>, 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 8/26/2025 5:17 PM, James Clark wrote:
> 
> 
> 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

Yes, you are right. Besides, I made a mistake here. I should put this 
Macro in patchset 2.

Anyway, I will fix it in next version.

Thanks,
Jie

> 
> 
> 
>