slimbus: ngd: Add qcom SLIMBus NGD driver

This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD)
controller driver.
This is light-weight SLIMBus controller driver responsible for
communicating with slave HW directly over the bus using messaging
interface, and communicating with master component residing on ADSP
for bandwidth and data-channel management

Based on intial work from
Karthikeyan Ramasubramanian <kramasub@codeaurora.org> and
Sagar Dharia <sdharia@codeaurora.org>

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Craig Tatlor <ctatlor97@gmail.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Srinivas-Kandagatla

drivers/slimbus/Kconfig

@@ -20,4 +20,15 @@ config SLIM_QCOM_CTRL
 	  Select driver if Qualcomm's SLIMbus Manager Component is
 	  programmed using Linux kernel.
 
+config SLIM_QCOM_NGD_CTRL
+	tristate "Qualcomm SLIMbus Satellite Non-Generic Device Component"
+	depends on QCOM_QMI_HELPERS
+	depends on HAS_IOMEM && DMA_ENGINE
+	help
+	  Select driver if Qualcomm's SLIMbus Satellite Non-Generic Device
+	  Component is programmed using Linux kernel.
+	  This is light-weight slimbus controller driver responsible for
+	  communicating with slave HW directly over the bus using messaging
+	  interface, and communicating with master component residing on ADSP
+	  for bandwidth and data-channel management.
 endif

drivers/slimbus/Makefile

@@ -8,3 +8,6 @@ slimbus-y				:= core.o messaging.o sched.o
 #Controllers
 obj-$(CONFIG_SLIM_QCOM_CTRL)		+= slim-qcom-ctrl.o
 slim-qcom-ctrl-y			:= qcom-ctrl.o
+
+obj-$(CONFIG_SLIM_QCOM_NGD_CTRL)	+= slim-qcom-ngd-ctrl.o
+slim-qcom-ngd-ctrl-y			:= qcom-ngd-ctrl.o