Input: synaptics-rmi4 - add SPI transport driver

Add the transport driver for devices using RMI4 over SPI.

Signed-off-by: Andrew Duggan <[email protected]>
Tested-by: Benjamin Tissoires <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Tested-by: Bjorn Andersson <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>

Author: aduggan-syna

drivers/input/rmi4/Kconfig

@@ -18,6 +18,15 @@ config RMI4_I2C
 
 	  If unsure, say Y.
 
+config RMI4_SPI
+	tristate "RMI4 SPI Support"
+	depends on RMI4_CORE && SPI
+	help
+	  Say Y here if you want to support RMI4 devices connected to a SPI
+	  bus.
+
+	  If unsure, say N.
+
 config RMI4_2D_SENSOR
 	bool
 	depends on RMI4_CORE

drivers/input/rmi4/Makefile

@@ -10,3 +10,4 @@ rmi_core-$(CONFIG_RMI4_F30) += rmi_f30.o
 
 # Transports
 obj-$(CONFIG_RMI4_I2C) += rmi_i2c.o
+obj-$(CONFIG_RMI4_SPI) += rmi_spi.o