[PATCH v3 2/3] coresight: tpda: add logic to configure TPDA_SYNCR register

Jie Gan
2025-08-27T11:49:05Z

From: Tao Zhang <tao.zhang@oss.qualcomm.com>

The TPDA_SYNCR register defines the frequency at which TPDA generates
ASYNC packets, enabling userspace tools to accurately parse each valid
packet.

Signed-off-by: Tao Zhang <tao.zhang@oss.qualcomm.com>
Co-developed-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
---
drivers/hwtracing/coresight/coresight-tpda.c | 7 +++++++
drivers/hwtracing/coresight/coresight-tpda.h | 5 +++++
2 files changed, 12 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c
index d4d1def5ec15..a1393962b04d 100644
--- a/drivers/hwtracing/coresight/coresight-tpda.c
+++ b/drivers/hwtracing/coresight/coresight-tpda.c
@@ -187,6 +187,13 @@ static void tpda_enable_pre_port(struct tpda_drvdata *drvdata)
*/
if (drvdata->trig_flag_ts)
writel_relaxed(0x0, drvdata->base + TPDA_FPID_CR);
+
+ /* Program the counter value for TPDA_SYNCR */
+ val = readl_relaxed(drvdata->base + TPDA_SYNCR);
+ /* Clear the mode */
+ val &= ~TPDA_SYNCR_MODE_CTRL;
+ val |= TPDA_SYNCR_COUNTER_MASK;
+ writel_relaxed(val, drvdata->base + TPDA_SYNCR);
}

static int tpda_enable_port(struct tpda_drvdata *drvdata, int port)
diff --git a/drivers/hwtracing/coresight/coresight-tpda.h b/drivers/hwtracing/coresight/coresight-tpda.h
index 0be625fb52fd..0c9bf2fade56 100644
--- a/drivers/hwtracing/coresight/coresight-tpda.h
+++ b/drivers/hwtracing/coresight/coresight-tpda.h
@@ -9,6 +9,7 @@
#define TPDA_CR (0x000)
#define TPDA_Pn_CR(n) (0x004 + (n * 4))
#define TPDA_FPID_CR (0x084)
+#define TPDA_SYNCR (0x08C)

/* Cross trigger FREQ packets timestamp bit */
#define TPDA_CR_FREQTS BIT(2)
@@ -27,6 +28,10 @@
#define TPDA_Pn_CR_CMBSIZE GENMASK(7, 6)
/* Aggregator port DSB data set element size bit */
#define TPDA_Pn_CR_DSBSIZE BIT(8)
+/* TPDA_SYNCR mode control bit */
+#define TPDA_SYNCR_MODE_CTRL BIT(12)
+/* TPDA_SYNCR counter mask */
+#define TPDA_SYNCR_COUNTER_MASK GENMASK(11, 0)

#define TPDA_MAX_INPORTS 32

--
2.34.1