Re: [PATCH v15 09/10] Coresight: Add Coresight TMC Control Unit driver

From: Jie Gan
Date: Tue Mar 04 2025 - 20:40:42 EST




On 3/4/2025 10:59 PM, Suzuki K Poulose wrote:
On 03/03/2025 03:29, Jie Gan wrote:
The Coresight TMC Control Unit hosts miscellaneous configuration registers
which control various features related to TMC ETR sink.

Based on the trace ID, which is programmed in the related CTCU ATID
register of a specific ETR, trace data with that trace ID gets into
the ETR buffer, while other trace data gets dropped.

Enabling source device sets one bit of the ATID register based on
source device's trace ID.
Disabling source device resets the bit according to the source
device's trace ID.

Reviewed-by: James Clark <james.clark@xxxxxxxxxx>
Signed-off-by: Jie Gan <quic_jiegan@xxxxxxxxxxx>

...

--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-ctcu.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2024-2025 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _CORESIGHT_CTCU_H
+#define _CORESIGHT_CTCU_H
+#include "coresight-trace-id.h"
+
+/* Maximum number of supported ETR devices for a single CTCU. */
+#define ETR_MAX_NUM     2
+

WARNING: please, no space before tabs
#413: FILE: drivers/hwtracing/coresight/coresight-ctcu.h:11:
+#define ETR_MAX_NUM ^I2$

total: 0 errors, 2 warnings, 397 lines checked

Another checkpatch warning. Please take care in the future.

Suzuki

Hi Suzuki,

Got it. Will take care in the future. Thanks for help to deal with them this time.

Jie