coresight tmc: Detect support for scatter gather
The SG unit in the TMC has been removed in Coresight SoC-600.
This is however advertised by DEVID:Bit 24 = 0b1. On the
previous generation, the bit is RES0, hence we can rely on the
DEVID to detect the support.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 13ab100..bb6a3e3 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -69,6 +69,8 @@
#define TMC_FFCR_STOP_ON_FLUSH BIT(12)
+#define TMC_DEVID_NOSCAT BIT(24)
+
enum tmc_config_type {
TMC_CONFIG_TYPE_ETB,
TMC_CONFIG_TYPE_ETR,
@@ -88,6 +90,9 @@ enum tmc_mem_intf_width {
TMC_MEM_INTF_WIDTH_256BITS = 8,
};
+/* TMC ETR Capability bit definitions */
+#define TMC_ETR_SG (0x1U << 0)
+
/**
* struct tmc_drvdata - specifics associated to an TMC component
* @base: memory mapped base address for this component.
