msm: hwmon: Add EPM ADC driver
External Power Monitor(EPM) uses the external ADS1158 ADC
to measure voltage and current. Each ADS1158 ADC supports
measuring 16 Analog input channels.
APQ8064 has support for 2ADS ADC and can measure upto 32
analog input channels. The power to the EPM uses a
SX1509 I2C expander to enable the ADS ADC. Depending on
the input channel the appropriate chip select is de-asserted
to select the ADS ADC to measure the input signal. The
ADS1158 chip is configured through the SPI interface.
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
Change-Id: Ib9f36606b6b183f75754b7763dbe45455c779327
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index a0f4669..36c370e 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -797,6 +797,14 @@
The driver supports reading the HKADC, XOADC and support to set and receive
temperature threshold notifications using the Battery temperature module.
+config SENSORS_EPM_ADC
+ tristate "EPM ADC Driver for power measurement"
+ depends on I2C && SPI_MASTER
+ default n
+ help
+ Provides interface for measuring the current on specific power rails
+ through the channels on ADC1158 ADC
+
config SENSORS_PC87360
tristate "National Semiconductor PC87360 family"
select HWMON_VID