[PATCH 5/9] coresight-tpdm: Add nodes to set trigger timestamp and type
Tao Zhang
quic_taozha at quicinc.com
Wed Oct 26 23:53:51 PDT 2022
Hi Suzuki,
在 10/24/2022 6:32 PM, Suzuki K Poulose 写道:
> On 08/09/2022 09:45, Tao Zhang wrote:
>> The nodes are needed to set or show the trigger timestamp and
>> trigger type. This change is to add these nodes to achieve these
>> function.
>>
>> Signed-off-by: Tao Zhang <quic_taozha at quicinc.com>
>> ---
>> drivers/hwtracing/coresight/coresight-tpdm.c | 90
>> ++++++++++++++++++++++++++++
>> 1 file changed, 90 insertions(+)
>>
>> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c
>> b/drivers/hwtracing/coresight/coresight-tpdm.c
>> index 74cc653..fae9963 100644
>> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
>> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
>> @@ -232,8 +232,98 @@ static struct attribute_group tpdm_attr_grp = {
>> .attrs = tpdm_attrs,
>> };
>> +static ssize_t dsb_trig_type_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>> +
>> + if (!(drvdata->datasets & TPDM_PIDR0_DS_DSB))
>> + return -EPERM;
>> +
>> + return scnprintf(buf, PAGE_SIZE, "%u\n",
>> + (unsigned int)drvdata->dsb->trig_type);
>> +}
>> +
>> +/*
>> + * value 0: set trigger type as enablement
>> + * value 1: set trigger type as disablement
>> + */
>> +static ssize_t dsb_trig_type_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf,
>> + size_t size)
>> +{
>> + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>> + unsigned long val;
>> +
>> + if ((kstrtoul(buf, 16, &val)) || val < 0 || val > 1)
>> + return -EINVAL;
>> + if (!(drvdata->datasets & TPDM_PIDR0_DS_DSB))
>> + return -EPERM;
>> +
>> + spin_lock(&drvdata->spinlock);
>> + if (val)
>> + drvdata->dsb->trig_type = true;
>> + else
>> + drvdata->dsb->trig_type = false;
>> + spin_unlock(&drvdata->spinlock);
>> + return size;
>> +}
>> +static DEVICE_ATTR_RW(dsb_trig_type);
>> +
>> +static ssize_t dsb_trig_ts_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>> +
>> + if (!(drvdata->datasets & TPDM_PIDR0_DS_DSB))
>> + return -EPERM;
>> +
>> + return scnprintf(buf, PAGE_SIZE, "%u\n",
>> + (unsigned int)drvdata->dsb->trig_ts);
>> +}
>> +
>> +/*
>> + * value 0: set trigger timestamp as enablement
>> + * value 1: set trigger timestamp as disablement
>> + */
>> +static ssize_t dsb_trig_ts_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf,
>> + size_t size)
>> +{
>> + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
>> + unsigned long val;
>> +
>> + if ((kstrtoul(buf, 16, &val)) || val < 0 || val > 1)
>> + return -EINVAL;
>> + if (!(drvdata->datasets & TPDM_PIDR0_DS_DSB))
>> + return -EPERM;
>> +
>> + spin_lock(&drvdata->spinlock);
>> + if (val)
>> + drvdata->dsb->trig_ts = true;
>> + else
>> + drvdata->dsb->trig_ts = false;
>> + spin_unlock(&drvdata->spinlock);
>> + return size;
>> +}
>> +static DEVICE_ATTR_RW(dsb_trig_ts);
>> +static struct attribute *tpdm_dsb_attrs[] = {
>> + &dev_attr_dsb_trig_ts.attr,
>> + &dev_attr_dsb_trig_type.attr,
>> + NULL,
>> +};
>> +
>> +static struct attribute_group tpdm_dsb_attr_grp = {
>> + .attrs = tpdm_dsb_attrs,
>> +};
>> +
>
> Please could we hide the "DSB" related knobs, if the
> the Data sets are missing using is_visible() hook ?
>
Make sense, I will update this in the next patch series.
> Suzuki
>
Best Regards
Tao
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