diff options
| author | Tao Zhang <quic_taozha@quicinc.com> | 2023-09-28 09:29:39 +0300 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2023-11-16 14:35:27 +0300 |
| commit | 8fbbce11a90f345a1ff39e2a08e312ee763a1139 (patch) | |
| tree | e356121952bfca2582745372f09dc268b53090f3 /drivers/hwtracing/coresight | |
| parent | f01e4948b516f073c353041328ae7cf709233303 (diff) | |
| download | linux-8fbbce11a90f345a1ff39e2a08e312ee763a1139.tar.xz | |
coresight-tpdm: Add reset node to TPDM node
TPDM device need a node to reset the configurations and status of
it. This change provides a node to reset the configurations and
disable the TPDM if it has been enabled.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-7-git-send-email-quic_taozha@quicinc.com
Diffstat (limited to 'drivers/hwtracing/coresight')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tpdm.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index 951ad4d9b76f..9c65e4c01128 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -162,6 +162,27 @@ static int tpdm_datasets_setup(struct tpdm_drvdata *drvdata) return 0; } +static ssize_t reset_dataset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t size) +{ + int ret = 0; + unsigned long val; + struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent); + + ret = kstrtoul(buf, 0, &val); + if (ret || val != 1) + return -EINVAL; + + spin_lock(&drvdata->spinlock); + tpdm_reset_datasets(drvdata); + spin_unlock(&drvdata->spinlock); + + return size; +} +static DEVICE_ATTR_WO(reset_dataset); + /* * value 1: 64 bits test data * value 2: 32 bits test data @@ -202,6 +223,7 @@ static ssize_t integration_test_store(struct device *dev, static DEVICE_ATTR_WO(integration_test); static struct attribute *tpdm_attrs[] = { + &dev_attr_reset_dataset.attr, &dev_attr_integration_test.attr, NULL, }; |