linux-kernel - [PATCH] [Patch v2]Add ETE devarch condition in etm4_init_iomem

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Message-ID: <20250409032917.7580-1-yiru.zhang@mediatek.com>
Date: Wed, 9 Apr 2025 11:29:12 +0800
From: yiru zhang <yiru.zhang@...iatek.com>
To: Suzuki K Poulose <suzuki.poulose@....com>, Mike Leach
	<mike.leach@...aro.org>, James Clark <james.clark@...aro.org>, Alexander
 Shishkin <alexander.shishkin@...ux.intel.com>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>, yiru
 zhang <yiru.zhang@...iatek.com>
Subject: [PATCH] [Patch v2]Add ETE devarch condition in etm4_init_iomem_access

Due to ETE supported, so add ETE devarch condition in etm4_init_iomem_access.
Signed-off-by: yiru zhang <yiru.zhang@...iatek.com>

v1->v2: use switch case way
---
 drivers/hwtracing/coresight/coresight-etm4x-core.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 2b8f10463840..366d11e038de 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1135,11 +1135,15 @@ static bool etm4_init_iomem_access(struct etmv4_drvdata *drvdata,
 	 * with MMIO. But we cannot touch the OSLK until we are
 	 * sure this is an ETM. So rely only on the TRCDEVARCH.
 	 */
-	if ((devarch & ETM_DEVARCH_ID_MASK) != ETM_DEVARCH_ETMv4x_ARCH) {
-		pr_warn_once("TRCDEVARCH doesn't match ETMv4 architecture\n");
+	switch (devarch & ETM_DEVARCH_ID_MASK) {
+	case ETM_DEVARCH_ETMv4x_ARCH:
+	case ETM_DEVARCH_ETE_ARCH:
+		break;
+	default:
+		pr_warn_once("Unknown ETM architecture: %x\n",
+			     devarch & ETM_DEVARCH_ID_MASK);
 		return false;
 	}
-
 	drvdata->arch = etm_devarch_to_arch(devarch);
 	*csa = CSDEV_ACCESS_IOMEM(drvdata->base);
 	return true;
-- 
2.46.0