linux-kernel - [PATCH] coresight: etm4x: Set skip_power_up in etm4_init_arch

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Message-ID: <20240131105423.9519-1-quic_jinlmao@quicinc.com>
Date: Wed, 31 Jan 2024 02:54:19 -0800
From: Mao Jinlong <quic_jinlmao@...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>
CC: Mao Jinlong <quic_jinlmao@...cinc.com>, <coresight@...ts.linaro.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: [PATCH] coresight: etm4x: Set skip_power_up in etm4_init_arch_data function

skip_power_up is used in etm4_init_arch_data when set lpoverride. So
need to set the value of it before calling using it.

Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
---
 drivers/hwtracing/coresight/coresight-etm4x-core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index c5ea808ea662..8afc07d1dd23 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1200,6 +1200,7 @@ static void etm4_init_arch_data(void *info)
 	struct etm4_init_arg *init_arg = info;
 	struct etmv4_drvdata *drvdata;
 	struct csdev_access *csa;
+	struct device *dev = init_arg->dev;
 	int i;
 
 	drvdata = dev_get_drvdata(init_arg->dev);
@@ -1213,6 +1214,10 @@ static void etm4_init_arch_data(void *info)
 	if (!etm4_init_csdev_access(drvdata, csa))
 		return;
 
+	if (!csa->io_mem ||
+	    fwnode_property_present(dev_fwnode(dev), "qcom,skip-power-up"))
+		drvdata->skip_power_up = true;
+
 	/* Detect the support for OS Lock before we actually use it */
 	etm_detect_os_lock(drvdata, csa);
 
@@ -2040,11 +2045,6 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg)
 	if (!drvdata->arch)
 		return -EINVAL;
 
-	/* TRCPDCR is not accessible with system instructions. */
-	if (!desc.access.io_mem ||
-	    fwnode_property_present(dev_fwnode(dev), "qcom,skip-power-up"))
-		drvdata->skip_power_up = true;
-
 	major = ETM_ARCH_MAJOR_VERSION(drvdata->arch);
 	minor = ETM_ARCH_MINOR_VERSION(drvdata->arch);
 
-- 
2.41.0