linux-kernel - [PATCH v2] Coresight: Narrow down the matching range of tpdm

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Message-ID: <20241009091728.1638-1-quic_songchai@quicinc.com>
Date: Wed, 9 Oct 2024 17:17:27 +0800
From: Songwei Chai <quic_songchai@...cinc.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
	<mike.leach@...aro.org>, James Clark <james.clark@....com>,
        "Alexander
 Shishkin" <alexander.shishkin@...ux.intel.com>,
        Andy Gross
	<agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Songwei Chai <quic_songchai@...cinc.com>, <linux-kernel@...r.kernel.org>,
        <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH v2] Coresight: Narrow down the matching range of tpdm

The format of tpdm's peripheral id is 1f0exx. To avoid potential
conflicts in the future, update the .id_table's id to 0x001f0e00.
This update will narrow down the matching range and prevent incorrect
matches. For example, another component's peripheral id might be
f0e00, which would incorrectly match the old id.

Fixes: b3c71626a9333b0b29f9921a39ce ("Coresight: Add coresight TPDM source driver")
Signed-off-by: Songwei Chai <quic_songchai@...cinc.com>
---
 drivers/hwtracing/coresight/coresight-tpdm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index b7d99e91ab84..3230d76aed90 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -1308,8 +1308,8 @@ static void tpdm_remove(struct amba_device *adev)
  */
 static struct amba_id tpdm_ids[] = {
 	{
-		.id = 0x000f0e00,
-		.mask = 0x000fff00,
+		.id	= 0x001f0e00,
+		.mask	= 0x00ffff00,
 	},
 	{ 0, 0, NULL },
 };