coresight: Add snapshot of Coresight cti driver

Add snapshot for coresight cti driver from msm-4.19
commit b92521c119 ("net: qrtr: Add node assignment on new server").
Make necessary change to adopt coresight framework change.

Change-Id: I12fb53e9fcaeb59eb748376ab6d8ed469b921f16
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>

drivers/hwtracing/coresight/Kconfig

@@ -119,6 +119,69 @@ config CORESIGHT_CPU_DEBUG
 	  properly, please refer Documentation/trace/coresight-cpu-debug.rst
 	  for detailed description and the example for usage.
 
+config CORESIGHT_CTI
+	bool "CoreSight Cross Trigger Interface driver"
+	help
+	  This driver provides support for Cross Trigger Interface that is
+	  used to input or output i.e. pass cross trigger events from one
+	  hardware component to another. It can also be used to pass
+	  software generated events.
+
+config CORESIGHT_CTI_SAVE_DISABLE
+	bool "Turn off CTI save and restore"
+	depends on CORESIGHT_CTI
+	help
+	  Turns off CoreSight CTI save and restore support for cpu CTIs. This
+	  avoids voting for the clocks during probe as well as the associated
+	  save and restore latency at the cost of breaking cpu CTI support on
+	  targets where cpu CTIs have to be preserved across power collapse.
+
+	  If unsure, say 'N' here to avoid breaking cpu CTI support.
+
+config CORESIGHT_TPDA
+	bool "CoreSight Trace, Profiling & Diagnostics Aggregator driver"
+	help
+	  This driver provides support for configuring aggregator. This is
+	  primarily useful for pulling the data sets from one or more
+	  attached monitors and pushing the resultant data out. Multiple
+	  monitors are connected on different input ports of TPDA.
+
+config CORESIGHT_TPDM
+	bool "CoreSight Trace, Profiling & Diagnostics Monitor driver"
+	help
+	  This driver provides support for configuring monitor. Monitors are
+	  primarily responsible for data set collection and support the
+	  ability to collect any permutation of data set types. Monitors are
+	  also responsible for interaction with system cross triggering.
+
+config CORESIGHT_TPDM_DEFAULT_ENABLE
+	bool "Turn on TPDM tracing by default"
+	depends on CORESIGHT_TPDM
+	help
+	  Turns on CoreSight TPDM tracing for different data set types by
+	  default. Otherwise, tracing is disabled by default but can be
+	  enabled via sysfs.
+
+	  If unsure, say 'N' here to avoid potential power and performance
+	  penalty.
+
+config CORESIGHT_CSR
+	bool "CoreSight Slave Register driver"
+	help
+	  This driver provides support for CoreSight Slave Register block
+	  that hosts miscellaneous configuration registers.
+	  Those configuration registers can be used to control, various
+	  coresight configurations.
+
+config CORESIGHT_HWEVENT
+	bool "CoreSight Hardware Event driver"
+	depends on CORESIGHT_STM
+	select CORESIGHT_CSR
+	help
+	  This driver provides support for monitoring and tracing CoreSight
+	  Hardware Event across STM interface. It configures Coresight
+	  Hardware Event mux control registers to select hardware events
+	  based on user input.
 config CORESIGHT_TPDA
 	bool "CoreSight Trace, Profiling & Diagnostics Aggregator driver"
 	help

drivers/hwtracing/coresight/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
 obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
 obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
 obj-$(CONFIG_CORESIGHT_CATU) += coresight-catu.o
+obj-$(CONFIG_CORESIGHT_CTI) += coresight-cti.o
 obj-$(CONFIG_CORESIGHT_TPDA) += coresight-tpda.o
 obj-$(CONFIG_CORESIGHT_TPDM) += coresight-tpdm.o
 obj-$(CONFIG_CORESIGHT_HWEVENT) += coresight-hwevent.o

include/linux/coresight-cti.h

@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2013-2014, 2019, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _LINUX_CORESIGHT_CTI_H
+#define _LINUX_CORESIGHT_CTI_H
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/list.h>
+
+struct coresight_cti_data {
+	int nr_ctis;
+	const char **names;
+};
+
+struct coresight_cti {
+	const char *name;
+	struct list_head link;
+};
+
+#ifdef CONFIG_CORESIGHT_CTI
+extern struct coresight_cti *coresight_cti_get(const char *name);
+extern void coresight_cti_put(struct coresight_cti *cti);
+extern int coresight_cti_map_trigin(
+			struct coresight_cti *cti, int trig, int ch);
+extern int coresight_cti_map_trigout(
+			struct coresight_cti *cti, int trig, int ch);
+extern void coresight_cti_unmap_trigin(
+			struct coresight_cti *cti, int trig, int ch);
+extern void coresight_cti_unmap_trigout(
+			struct coresight_cti *cti, int trig, int ch);
+extern void coresight_cti_reset(struct coresight_cti *cti);
+extern int coresight_cti_set_trig(struct coresight_cti *cti, int ch);
+extern void coresight_cti_clear_trig(struct coresight_cti *cti, int ch);
+extern int coresight_cti_pulse_trig(struct coresight_cti *cti, int ch);
+extern int coresight_cti_enable_gate(struct coresight_cti *cti, int ch);
+extern void coresight_cti_disable_gate(struct coresight_cti *cti, int ch);
+extern void coresight_cti_ctx_save(void);
+extern void coresight_cti_ctx_restore(void);
+extern int coresight_cti_ack_trig(struct coresight_cti *cti, int trig);
+#else
+static inline struct coresight_cti *coresight_cti_get(const char *name)
+{
+	return NULL;
+}
+static inline void coresight_cti_put(struct coresight_cti *cti) {}
+static inline int coresight_cti_map_trigin(
+			struct coresight_cti *cti, int trig, int ch)
+{
+	return -ENODEV;
+}
+static inline int coresight_cti_map_trigout(
+			struct coresight_cti *cti, int trig, int ch)
+{
+	return -ENODEV;
+}
+static inline void coresight_cti_unmap_trigin(
+			struct coresight_cti *cti, int trig, int ch) {}
+static inline void coresight_cti_unmap_trigout(
+			struct coresight_cti *cti, int trig, int ch) {}
+static inline void coresight_cti_reset(struct coresight_cti *cti) {}
+static inline int coresight_cti_set_trig(struct coresight_cti *cti, int ch)
+{
+	return -ENODEV;
+}
+static inline void coresight_cti_clear_trig(struct coresight_cti *cti, int ch)
+{}
+static inline int coresight_cti_pulse_trig(struct coresight_cti *cti, int ch)
+{
+	return -ENODEV;
+}
+static inline int coresight_cti_enable_gate(struct coresight_cti *cti, int ch)
+{
+	return -ENODEV;
+}
+static inline void coresight_cti_disable_gate(struct coresight_cti *cti, int ch)
+{}
+static inline void coresight_cti_ctx_save(void){}
+static inline void coresight_cti_ctx_restore(void){}
+static inline int coresight_cti_ack_trig(struct coresight_cti *cti, int trig)
+{
+	return -ENODEV;
+}
+#endif
+
+#endif