iio: adc: New driver for the AB8500 GPADC (07063bbf) · Commits · 戴 / test

This is a new driver for the ST-Ericsson AB8500 GPADC, which replaces the old driver in drivers/mfd/ab8500-gpadc.c and thus gets rid of another necessarily different custom driver from the times before IIO existed. The AB8500 GPADC can convert 10 different channels and these are used for monitoring voltages in the U8500 chipset, some are used for battery charging, some for temperature monitoring. As this is very core functionality that a lot of drivers depend on and was formerly compiled in with the AB8500 core driver, we deafault it to 'y' in Kconfig: it can be compiled out but it is really not advisible: the platform can for example overheat if we do. Reviewed-by:

Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by:

Linus Walleij <linus.walleij@linaro.org> Signed-off-by:

Jonathan Cameron <Jonathan.Cameron@huawei.com>

MAINTAINERS

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Original line number	Diff line number	Diff line
		@@ -2005,6 +2005,7 @@ F: drivers/dma/ste_dma40*
		F: drivers/hwspinlock/u8500_hsem.c
		F: drivers/i2c/busses/i2c-nomadik.c
		F: drivers/i2c/busses/i2c-stu300.c
		F: drivers/iio/adc/ab8500-gpadc.c
		F: drivers/mfd/ab3100*
		F: drivers/mfd/ab8500*
		F: drivers/mfd/abx500*

drivers/iio/adc/Kconfig

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Original line number	Diff line number	Diff line
		@@ -6,6 +6,16 @@

		menu "Analog to digital converters"

		config AB8500_GPADC
		bool "ST-Ericsson AB8500 GPADC driver"
		depends on AB8500_CORE && REGULATOR_AB8500
		default y
		help
		AB8500 Analog Baseband, mixed signal integrated circuit GPADC
		(General Purpose Analog to Digital Converter) driver used to monitor
		internal voltages, convert accessory and battery, AC (charger, mains)
		and USB voltages integral to the U8500 platform.

		config AD_SIGMA_DELTA
		tristate
		select IIO_BUFFER

drivers/iio/adc/Makefile

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Original line number	Diff line number	Diff line
		@@ -4,6 +4,7 @@
		#

		# When adding new entries keep the list in alphabetical order
		obj-$(CONFIG_AB8500_GPADC) += ab8500-gpadc.o
		obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
		obj-$(CONFIG_AD7124) += ad7124.o
		obj-$(CONFIG_AD7266) += ad7266.o

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