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iio: adc: Add Spreadtrum SC27XX PMICs ADC support

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The Spreadtrum SC27XX PMICs ADC controller contains 32 channels,
which is used to sample voltages with 12 bits conversion.

[Baolin Wang did lots of improvements]

Signed-off-by: Freeman Liu <freeman.liu@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Freeman Liu
2018-06-21 11:14:05 +08:00
committed by Jonathan Cameron
parent d93de07a12
commit 5df362a6cf
3 changed files with 533 additions and 0 deletions
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10
drivers/iio/adc/Kconfig
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@@ -620,6 +620,16 @@ config ROCKCHIP_SARADC
To compile this driver as a module, choose M here: the
module will be called rockchip_saradc.
config SC27XX_ADC
tristate "Spreadtrum SC27xx series PMICs ADC"
depends on MFD_SC27XX_PMIC || COMPILE_TEST
help
Say yes here to build support for the integrated ADC inside the
Spreadtrum SC27xx series PMICs.
This driver can also be built as a module. If so, the module
will be called sc27xx_adc.
config SPEAR_ADC
tristate "ST SPEAr ADC"
depends on PLAT_SPEAR || COMPILE_TEST

1
drivers/iio/adc/Makefile
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@@ -59,6 +59,7 @@ obj-$(CONFIG_QCOM_SPMI_VADC) += qcom-spmi-vadc.o
obj-$(CONFIG_QCOM_PM8XXX_XOADC) += qcom-pm8xxx-xoadc.o
obj-$(CONFIG_RCAR_GYRO_ADC) += rcar-gyroadc.o
obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o
obj-$(CONFIG_SC27XX_ADC) += sc27xx_adc.o
obj-$(CONFIG_SPEAR_ADC) += spear_adc.o
obj-$(CONFIG_STX104) += stx104.o
obj-$(CONFIG_SUN4I_GPADC) += sun4i-gpadc-iio.o

522
drivers/iio/adc/sc27xx_adc.c Normal file
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