linux-kernel - [PATCH v6 02/10] coresight-tpdm: Optimize the useage of tpdm_has_dsb

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Date: Fri, 2 Feb 2024 17:32:36 +0800
From: Tao Zhang <quic_taozha@...cinc.com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose
	<suzuki.poulose@....com>,
        Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>,
        Konrad Dybcio <konradybcio@...il.com>,
        Mike Leach <mike.leach@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Tao Zhang <quic_taozha@...cinc.com>,
        Jinlong Mao
	<quic_jinlmao@...cinc.com>, Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>,
        <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Trilok Soni
	<quic_tsoni@...cinc.com>,
        Song Chai <quic_songchai@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <andersson@...nel.org>
Subject: [PATCH v6 02/10] coresight-tpdm: Optimize the useage of tpdm_has_dsb_dataset

Since the function tpdm_has_dsb_dataset will be called by TPDA
driver in subsequent patches, it is moved to the header file.
And move this judgement form the function __tpdm_{enable/disable}
to the beginning of the function tpdm_{enable/disable}_dsb.

Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
---
 drivers/hwtracing/coresight/coresight-tpdm.c | 30 +++++++++-----------
 drivers/hwtracing/coresight/coresight-tpdm.h |  4 +++
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 0427c0fc0bf3..4b1296d11360 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -125,11 +125,6 @@ static ssize_t tpdm_simple_dataset_store(struct device *dev,
 	return ret;
 }
 
-static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata)
-{
-	return (drvdata->datasets & TPDM_PIDR0_DS_DSB);
-}
-
 static umode_t tpdm_dsb_is_visible(struct kobject *kobj,
 				   struct attribute *attr, int n)
 {
@@ -232,25 +227,27 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
 {
 	u32 val, i;
 
+	if (!tpdm_has_dsb_dataset(drvdata))
+		return;
+
 	for (i = 0; i < TPDM_DSB_MAX_EDCR; i++)
 		writel_relaxed(drvdata->dsb->edge_ctrl[i],
-			   drvdata->base + TPDM_DSB_EDCR(i));
+			       drvdata->base + TPDM_DSB_EDCR(i));
 	for (i = 0; i < TPDM_DSB_MAX_EDCMR; i++)
 		writel_relaxed(drvdata->dsb->edge_ctrl_mask[i],
-			   drvdata->base + TPDM_DSB_EDCMR(i));
+			       drvdata->base + TPDM_DSB_EDCMR(i));
 	for (i = 0; i < TPDM_DSB_MAX_PATT; i++) {
 		writel_relaxed(drvdata->dsb->patt_val[i],
-			   drvdata->base + TPDM_DSB_TPR(i));
+			       drvdata->base + TPDM_DSB_TPR(i));
 		writel_relaxed(drvdata->dsb->patt_mask[i],
-			   drvdata->base + TPDM_DSB_TPMR(i));
+			       drvdata->base + TPDM_DSB_TPMR(i));
 		writel_relaxed(drvdata->dsb->trig_patt[i],
-			   drvdata->base + TPDM_DSB_XPR(i));
+			       drvdata->base + TPDM_DSB_XPR(i));
 		writel_relaxed(drvdata->dsb->trig_patt_mask[i],
-			   drvdata->base + TPDM_DSB_XPMR(i));
+			       drvdata->base + TPDM_DSB_XPMR(i));
 	}
 
 	set_dsb_tier(drvdata);
-
 	set_dsb_msr(drvdata);
 
 	val = readl_relaxed(drvdata->base + TPDM_DSB_CR);
@@ -278,8 +275,7 @@ static void __tpdm_enable(struct tpdm_drvdata *drvdata)
 {
 	CS_UNLOCK(drvdata->base);
 
-	if (tpdm_has_dsb_dataset(drvdata))
-		tpdm_enable_dsb(drvdata);
+	tpdm_enable_dsb(drvdata);
 
 	CS_LOCK(drvdata->base);
 }
@@ -307,6 +303,9 @@ static void tpdm_disable_dsb(struct tpdm_drvdata *drvdata)
 {
 	u32 val;
 
+	if (!tpdm_has_dsb_dataset(drvdata))
+		return;
+
 	/* Set the enable bit of DSB control register to 0 */
 	val = readl_relaxed(drvdata->base + TPDM_DSB_CR);
 	val &= ~TPDM_DSB_CR_ENA;
@@ -318,8 +317,7 @@ static void __tpdm_disable(struct tpdm_drvdata *drvdata)
 {
 	CS_UNLOCK(drvdata->base);
 
-	if (tpdm_has_dsb_dataset(drvdata))
-		tpdm_disable_dsb(drvdata);
+	tpdm_disable_dsb(drvdata);
 
 	CS_LOCK(drvdata->base);
 }
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index 4115b2a17b8d..ddaf333fa1c2 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -220,4 +220,8 @@ struct tpdm_dataset_attribute {
 	u32 idx;
 };
 
+static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata)
+{
+	return (drvdata->datasets & TPDM_PIDR0_DS_DSB);
+}
 #endif  /* _CORESIGHT_CORESIGHT_TPDM_H */
-- 
2.17.1