From: Tao Zhang <quic_taozha@quicinc.com>
To: Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Konrad Dybcio <konradybcio@gmail.com>,
Mike Leach <mike.leach@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Tao Zhang <quic_taozha@quicinc.com>,
Jinlong Mao <quic_jinlmao@quicinc.com>,
Leo Yan <leo.yan@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
<coresight@lists.linaro.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
Tingwei Zhang <quic_tingweiz@quicinc.com>,
Yuanfang Zhang <quic_yuanfang@quicinc.com>,
Trilok Soni <quic_tsoni@quicinc.com>,
Hao Zhang <quic_hazha@quicinc.com>,
<linux-arm-msm@vger.kernel.org>, <bjorn.andersson@linaro.org>
Subject: [PATCH v3 04/11] coresight-tpdm: Add reset node to TPDM node
Date: Thu, 23 Mar 2023 14:04:01 +0800 [thread overview]
Message-ID: <1679551448-19160-5-git-send-email-quic_taozha@quicinc.com> (raw)
In-Reply-To: <1679551448-19160-1-git-send-email-quic_taozha@quicinc.com>
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>
---
drivers/hwtracing/coresight/coresight-tpdm.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 5e1e2ba..104638d 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -161,6 +161,33 @@ static void tpdm_datasets_setup(struct tpdm_drvdata *drvdata)
drvdata->datasets |= pidr & GENMASK(TPDM_DATASETS - 1, 0);
}
+static ssize_t reset_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, 10, &val);
+ if (ret || val != 1)
+ return -EINVAL;
+
+ spin_lock(&drvdata->spinlock);
+ /* Reset all datasets to ZERO, and init the default data*/
+ tpdm_init_datasets(drvdata);
+
+ spin_unlock(&drvdata->spinlock);
+
+ /* Disable tpdm if enabled */
+ if (drvdata->enable)
+ coresight_disable(drvdata->csdev);
+
+ return size;
+}
+static DEVICE_ATTR_WO(reset);
+
/*
* value 1: 64 bits test data
* value 2: 32 bits test data
@@ -201,6 +228,7 @@ static ssize_t integration_test_store(struct device *dev,
static DEVICE_ATTR_WO(integration_test);
static struct attribute *tpdm_attrs[] = {
+ &dev_attr_reset.attr,
&dev_attr_integration_test.attr,
NULL,
};
--
2.7.4
next prev parent reply other threads:[~2023-03-23 6:05 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-23 6:03 [PATCH v3 0/11] Add support to configure TPDM DSB subunit Tao Zhang
2023-03-23 6:03 ` [PATCH v3 01/11] dt-bindings: arm: Add support for DSB element size Tao Zhang
2023-03-23 11:18 ` Suzuki K Poulose
2023-03-24 8:25 ` Tao Zhang
2023-03-24 9:15 ` Tao Zhang
2023-03-25 11:35 ` Krzysztof Kozlowski
2023-03-28 11:23 ` Tao Zhang
2023-03-23 6:03 ` [PATCH v3 02/11] coresight-tpda: Add DSB dataset support Tao Zhang
2023-03-23 11:51 ` Suzuki K Poulose
[not found] ` <51ad3cb3-bd83-51c9-52bc-f700cd17103c@quicinc.com>
2023-03-25 19:31 ` Suzuki K Poulose
2023-03-27 3:31 ` Tao Zhang
2023-03-27 9:43 ` Suzuki K Poulose
2023-03-28 11:31 ` Tao Zhang
2023-03-28 12:33 ` Suzuki K Poulose
2023-03-30 14:07 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 03/11] coresight-tpdm: Initialize DSB subunit configuration Tao Zhang
2023-03-23 14:23 ` Suzuki K Poulose
2023-03-27 6:46 ` Tao Zhang
2023-03-23 6:04 ` Tao Zhang [this message]
2023-03-23 14:41 ` [PATCH v3 04/11] coresight-tpdm: Add reset node to TPDM node Suzuki K Poulose
2023-03-23 14:48 ` Suzuki K Poulose
2023-03-27 7:11 ` Tao Zhang
2023-03-27 6:59 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 05/11] coresight-tpdm: Add nodes to set trigger timestamp and type Tao Zhang
2023-04-01 9:30 ` Suzuki K Poulose
2023-03-23 6:04 ` [PATCH v3 06/11] coresight-tpdm: Add node to set dsb programming mode Tao Zhang
2023-03-23 14:55 ` Suzuki K Poulose
2023-03-27 7:21 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 07/11] coresight-tpdm: Add nodes for dsb edge control Tao Zhang
2023-03-23 17:04 ` Suzuki K Poulose
2023-03-27 7:36 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 08/11] coresight-tpdm: Add nodes to configure pattern match output Tao Zhang
2023-03-23 17:27 ` Suzuki K Poulose
2023-03-27 7:49 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 09/11] coresight-tpdm: Add nodes for timestamp request Tao Zhang
2023-03-23 18:41 ` Suzuki K Poulose
2023-03-27 8:37 ` Tao Zhang
2023-03-23 6:04 ` [PATCH v3 10/11] dt-bindings: arm: Add support for DSB MSR register Tao Zhang
2023-03-23 18:48 ` Suzuki K Poulose
2023-03-30 7:55 ` Krzysztof Kozlowski
2023-03-23 6:04 ` [PATCH v3 11/11] coresight-tpdm: Add nodes for dsb msr support Tao Zhang
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