soc: qcom: dcc:Add driver support for Data Capture and Compare unit(DCC)

The DCC is a DMA Engine designed to capture and store data
during system crash or software triggers.The DCC operates
based on link list entries which provides it with data and
addresses and the function it needs to perform.These functions
are read,write and loop.Added the basic driver in this patch
which contains a probe method which instantiates all the link
list data specific to a SoC.Methods have also been added to
handle all the functionalities specific to a linked list.Each
DCC has it's own SRAM which needs to be instantiated at probe
time as well.

Signed-off-by: Souradeep Chowdhury <schowdhu@codeaurora.org>

drivers/soc/qcom/Kconfig

@@ -69,6 +69,14 @@ config QCOM_LLCC
 	  SDM845. This provides interfaces to clients that use the LLCC.
 	  Say yes here to enable LLCC slice driver.
 
+config QCOM_DCC
+	tristate "Qualcomm Technologies, Inc. Data Capture and Compare engine driver"
+	depends on ARCH_QCOM || COMPILE_TEST
+	help
+	  This option enables driver for Data Capture and Compare engine. DCC
+	  driver provides interface to configure DCC block and read back
+	  captured data from DCC's internal SRAM.
+
 config QCOM_KRYO_L2_ACCESSORS
 	bool
 	depends on ARCH_QCOM && ARM64 || COMPILE_TEST

drivers/soc/qcom/Makefile

@@ -26,3 +26,4 @@ obj-$(CONFIG_QCOM_LLCC) += llcc-qcom.o
 obj-$(CONFIG_QCOM_RPMHPD) += rpmhpd.o
 obj-$(CONFIG_QCOM_RPMPD) += rpmpd.o
 obj-$(CONFIG_QCOM_KRYO_L2_ACCESSORS) +=	kryo-l2-accessors.o
+obj-$(CONFIG_QCOM_DCC) += dcc.o