pwm: Add snapshot of QTI PWM LPG driver

QTI PWM LPG driver supports configuring PWM/LPG channels on QTI
PMICs based on the client's request.

This snapshot is taken as of msm-4.14
commit 9bb584ae3a9d ("msm/sde/rotator: Add rev checks for sdmmagpie").

Change-Id: Icc3c6c7431e028aea6dd1759b8bad2e3b8eb9259
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>

drivers/pwm/Kconfig

@@ -340,6 +340,16 @@ config PWM_PXA
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-pxa.
 
+config PWM_QTI_LPG
+	tristate "Qualcomm Technologies, Inc. LPG driver"
+	depends on  MFD_SPMI_PMIC && OF
+	help
+	  This driver supports the LPG (Light Pulse Generator) module found in
+	  Qualcomm Technologies, Inc. PMIC chips. Each LPG channel can be
+	  configured to operate in PWM mode to output a fixed amplitude with
+	  variable duty cycle or in LUT (Look up table) mode to output PWM
+	  signal with a modulated amplitude.
+
 config PWM_RCAR
 	tristate "Renesas R-Car PWM support"
 	depends on ARCH_RENESAS || COMPILE_TEST

drivers/pwm/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_PWM_PCA9685)	+= pwm-pca9685.o
 obj-$(CONFIG_PWM_PUV3)		+= pwm-puv3.o
 obj-$(CONFIG_PWM_PXA)		+= pwm-pxa.o
 obj-$(CONFIG_PWM_RCAR)		+= pwm-rcar.o
+obj-$(CONFIG_PWM_QTI_LPG)	+= pwm-qti-lpg.o
 obj-$(CONFIG_PWM_RENESAS_TPU)	+= pwm-renesas-tpu.o
 obj-$(CONFIG_PWM_ROCKCHIP)	+= pwm-rockchip.o
 obj-$(CONFIG_PWM_SAMSUNG)	+= pwm-samsung.o