linux-kernel - [PATCH v3 1/3] coresight: tmc: Add missing doc including reading and etr_mode of struct tmc

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Message-ID: <20250818080600.418425-2-hejunhao3@huawei.com>
Date: Mon, 18 Aug 2025 16:05:58 +0800
From: Junhao He <hejunhao3@...wei.com>
To: <suzuki.poulose@....com>, <james.clark@....com>,
	<anshuman.khandual@....com>, <leo.yan@....com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
	<jonathan.cameron@...wei.com>, <yangyicong@...wei.com>,
	<prime.zeng@...ilicon.com>, <hejunhao3@...wei.com>
Subject: [PATCH v3 1/3] coresight: tmc: Add missing doc including reading and etr_mode of struct tmc_drvdata

From: Yicong Yang <yangyicong@...ilicon.com>

tmc_drvdata::reading is used to indicate whether a reading process
is performed through /dev/xyz.tmc.
tmc_drvdata::etr_mode is used to store the Coresight TMC-ETR buffer
mode selected by the user.
Document them.

Reviewed-by: James Clark <james.clark@...aro.org>
Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
Signed-off-by: Junhao He <hejunhao3@...wei.com>
---
 drivers/hwtracing/coresight/coresight-tmc.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 6541a27a018e..9daa2680cfb6 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -220,6 +220,7 @@ struct tmc_resrv_buf {
  * @pid:	Process ID of the process that owns the session that is using
  *		this component. For example this would be the pid of the Perf
  *		process.
+ * @reading:	buffer's in the reading through "/dev/xyz.tmc" entry
  * @stop_on_flush: Stop on flush trigger user configuration.
  * @buf:	Snapshot of the trace data for ETF/ETB.
  * @etr_buf:	details of buffer used in TMC-ETR
@@ -232,6 +233,7 @@ struct tmc_resrv_buf {
  * @trigger_cntr: amount of words to store after a trigger.
  * @etr_caps:	Bitmask of capabilities of the TMC ETR, inferred from the
  *		device configuration register (DEVID)
+ * @etr_mode:	User preferred mode of the ETR device, default auto mode.
  * @idr:	Holds etr_bufs allocated for this ETR.
  * @idr_mutex:	Access serialisation for idr.
  * @sysfs_buf:	SYSFS buffer for ETR.
-- 
2.33.0