iio: adc: axp20x_adc: add support for AXP813 ADC

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The X-Powers AXP813 PMIC is really close to what is already done for
AXP20X/AXP22X.

There are two pairs of bits to set the rate (one for Voltage and Current
measurements and one for TS/GPIO0 voltage measurements) instead of one.

The register to set the ADC rates is different from the one for
AXP20X/AXP22X.

GPIO0 can be used as an ADC (measuring Volts) unlike for AXP22X.

The scales to apply to the different inputs are unlike the ones from
AXP20X and AXP22X.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Quentin Schulz 2018-01-15 11:33:41 +01:00 • committed by Jonathan Cameron

parent 359163d786

commit 1a3f675564

2 changed files with 125 additions and 0 deletions

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123

drivers/iio/adc/axp20x_adc.c

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2

include/linux/mfd/axp20x.h

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