coresight: etm4x: Cleanup TRCIDR0 register accesses

This is a no-op change for style and consistency and has no effect on
the binary output by the compiler. In sysreg.h fields are defined as
the register name followed by the field name and then _MASK. This
allows for grepping for fields by name rather than using magic numbers.
Signed-off-by: NJames Clark <james.clark@arm.com>
Reviewed-by: NMike Leach <mike.leach@linaro.org>
Link: https://lore.kernel.org/r/20220304171913.2292458-2-james.clark@arm.comSigned-off-by: NMathieu Poirier <mathieu.poirier@linaro.org>

drivers/hwtracing/coresight/coresight-etm4x-core.c

@@ -1097,41 +1097,21 @@ static void etm4_init_arch_data(void *info)
 	etmidr0 = etm4x_relaxed_read32(csa, TRCIDR0);
 
 	/* INSTP0, bits[2:1] P0 tracing support field */
-	if (BMVAL(etmidr0, 1, 2) == 0b11)
-		drvdata->instrp0 = true;
-	else
-		drvdata->instrp0 = false;
-
+	drvdata->instrp0 = !!(FIELD_GET(TRCIDR0_INSTP0_MASK, etmidr0) == 0b11);
 	/* TRCBB, bit[5] Branch broadcast tracing support bit */
-	if (BMVAL(etmidr0, 5, 5))
-		drvdata->trcbb = true;
-	else
-		drvdata->trcbb = false;
-
+	drvdata->trcbb = !!(etmidr0 & TRCIDR0_TRCBB);
 	/* TRCCOND, bit[6] Conditional instruction tracing support bit */
-	if (BMVAL(etmidr0, 6, 6))
-		drvdata->trccond = true;
-	else
-		drvdata->trccond = false;
-
+	drvdata->trccond = !!(etmidr0 & TRCIDR0_TRCCOND);
 	/* TRCCCI, bit[7] Cycle counting instruction bit */
-	if (BMVAL(etmidr0, 7, 7))
-		drvdata->trccci = true;
-	else
-		drvdata->trccci = false;
-
+	drvdata->trccci = !!(etmidr0 & TRCIDR0_TRCCCI);
 	/* RETSTACK, bit[9] Return stack bit */
-	if (BMVAL(etmidr0, 9, 9))
-		drvdata->retstack = true;
-	else
-		drvdata->retstack = false;
-
+	drvdata->retstack = !!(etmidr0 & TRCIDR0_RETSTACK);
 	/* NUMEVENT, bits[11:10] Number of events field */
-	drvdata->nr_event = BMVAL(etmidr0, 10, 11);
+	drvdata->nr_event = FIELD_GET(TRCIDR0_NUMEVENT_MASK, etmidr0);
 	/* QSUPP, bits[16:15] Q element support field */
-	drvdata->q_support = BMVAL(etmidr0, 15, 16);
+	drvdata->q_support = FIELD_GET(TRCIDR0_QSUPP_MASK, etmidr0);
 	/* TSSIZE, bits[28:24] Global timestamp size field */
-	drvdata->ts_size = BMVAL(etmidr0, 24, 28);
+	drvdata->ts_size = FIELD_GET(TRCIDR0_TSSIZE_MASK, etmidr0);
 
 	/* maximum size of resources */
 	etmidr2 = etm4x_relaxed_read32(csa, TRCIDR2);

drivers/hwtracing/coresight/coresight-etm4x.h

@@ -130,6 +130,19 @@
 
 #define TRCRSR_TA			BIT(12)
 
+/*
+ * Bit positions of registers that are defined above, in the sysreg.h style
+ * of _MASK for multi bit fields and BIT() for single bits.
+ */
+#define TRCIDR0_INSTP0_MASK			GENMASK(2, 1)
+#define TRCIDR0_TRCBB				BIT(5)
+#define TRCIDR0_TRCCOND				BIT(6)
+#define TRCIDR0_TRCCCI				BIT(7)
+#define TRCIDR0_RETSTACK			BIT(9)
+#define TRCIDR0_NUMEVENT_MASK			GENMASK(11, 10)
+#define TRCIDR0_QSUPP_MASK			GENMASK(16, 15)
+#define TRCIDR0_TSSIZE_MASK			GENMASK(28, 24)
+
 /*
  * System instructions to access ETM registers.
  * See ETMv4.4 spec ARM IHI0064F section 4.3.6 System instructions