pwm: pwm-qti-lpg: Add PWM driver for QTI LPG module

Add pwm_chip to support QTI LPG module and export LPG channels as
PWM devices for consumer drivers' usage.

Change-Id: I17b8740bf3c02c9fc19c5e87da17cd2b5321f50f
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index e7d13ae..8e367c5 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -350,6 +350,16 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-rcar.
 
+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_RENESAS_TPU
 	tristate "Renesas TPU PWM support"
 	depends on ARCH_RENESAS || COMPILE_TEST