input: add Qualcomm SPMI haptics driver

Add support for the haptics found in pmi8998 and related PMICs.
Based on the ff-memless interface. Currently this driver provides
a partial implementation of hardware features.

This driver only supports LRAs (Linear Resonant Actuators) in the "buffer"
mode with a single wave pattern.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>

drivers/input/misc/Kconfig

@@ -186,6 +186,18 @@ config INPUT_PMIC8XXX_PWRKEY
 	  To compile this driver as a module, choose M here: the
 	  module will be called pmic8xxx-pwrkey.
 
+config INPUT_QCOM_SPMI_HAPTICS
+	tristate "Qualcomm SPMI HAPTICS"
+	depends on ARCH_QCOM
+	depends on SPMI
+	select INPUT_FF_MEMLESS
+	help
+	  This option enables support for the haptics found in pmi8998 and
+	  related PMICs. Based on the ff-memless interface.
+
+	  To compile this driver as module, choose M here: the
+	  module will be called qcom_spmi_haptics.
+
 config INPUT_SPARCSPKR
 	tristate "SPARC Speaker support"
 	depends on PCI && SPARC64

drivers/input/misc/Makefile

@@ -65,6 +65,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)	+= pmic8xxx-pwrkey.o
 obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
 obj-$(CONFIG_INPUT_PWM_BEEPER)		+= pwm-beeper.o
 obj-$(CONFIG_INPUT_PWM_VIBRA)		+= pwm-vibra.o
+obj-$(CONFIG_INPUT_QCOM_SPMI_HAPTICS)	+= qcom-spmi-haptics.o
 obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON)	+= rave-sp-pwrbutton.o
 obj-$(CONFIG_INPUT_RB532_BUTTON)	+= rb532_button.o
 obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)	+= regulator-haptic.o