linux-kernel - [PATCH 14/15] coresight: Make ETM4x TRCBBCTLR register accesses consistent with sysreg.h

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Date:   Wed,  2 Feb 2022 16:02:24 +0000
From:   James Clark <james.clark@....com>
To:     mathieu.poirier@...aro.org, coresight@...ts.linaro.org
Cc:     suzuki.poulose@....com, leo.yan@...aro.com, mike.leach@...aro.org,
        James Clark <james.clark@....com>,
        Leo Yan <leo.yan@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 14/15] coresight: Make ETM4x TRCBBCTLR register accesses consistent with sysreg.h

This is a no-op change for style and consistency and has no effect on the
binary produced by gcc-11.

Signed-off-by: James Clark <james.clark@....com>
---
 drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 5 +++--
 drivers/hwtracing/coresight/coresight-etm4x.h       | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
index 682819467755..a0cdd2cd978a 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
@@ -707,10 +707,11 @@ static ssize_t bb_ctrl_store(struct device *dev,
 	 * individual range comparators. If include then at least 1
 	 * range must be selected.
 	 */
-	if ((val & BIT(8)) && (BMVAL(val, 0, 7) == 0))
+	if ((val & TRCBBCTLR_MODE) && (REG_VAL(val, TRCBBCTLR_RANGE) == 0))
 		return -EINVAL;
 
-	config->bb_ctrl = val & GENMASK(8, 0);
+	config->bb_ctrl = val & (TRCBBCTLR_MODE |
+				 (TRCBBCTLR_RANGE_MASK << TRCBBCTLR_RANGE_SHIFT));
 	return size;
 }
 static DEVICE_ATTR_RW(bb_ctrl);
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index 9d0978540338..4d943faade33 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -254,6 +254,10 @@
 #define TRCSSPCICRn_PC_SHIFT			0
 #define TRCSSPCICRn_PC_MASK			GENMASK(7, 0)
 
+#define TRCBBCTLR_MODE				BIT(8)
+#define TRCBBCTLR_RANGE_SHIFT			0
+#define TRCBBCTLR_RANGE_MASK			GENMASK(7, 0)
+
 /*
  * System instructions to access ETM registers.
  * See ETMv4.4 spec ARM IHI0064F section 4.3.6 System instructions
-- 
2.28.0