From 8fbbce11a90f345a1ff39e2a08e312ee763a1139 Mon Sep 17 00:00:00 2001 From: Tao Zhang Date: Thu, 28 Sep 2023 14:29:39 +0800 Subject: 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 Signed-off-by: Suzuki K Poulose Link: https://lore.kernel.org/r/1695882586-10306-7-git-send-email-quic_taozha@quicinc.com --- drivers/hwtracing/coresight/coresight-tpdm.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/hwtracing/coresight/coresight-tpdm.c') 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, }; -- cgit v1.2.3