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dt-bindings: iio: adc: add binding for X-Powers AXP PMICs ADC

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X-Powers PMICs have several ADC channels that can be used for different
purposes, e.g. PMIC internal temperature, battery voltage or AC current.

This is the documentation for AXP209, AXP221/223 and AXP813 ADC
bindings.

Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Quentin Schulz 2018-01-15 11:33:36 +01:00 committed by Jonathan Cameron
parent 0659ecb5df
commit 22042a6e69
1 changed files with 48 additions and 0 deletions
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Documentation/devicetree/bindings/iio/adc/axp20x_adc.txt Normal file
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* X-Powers AXP ADC bindings
Required properties:
- compatible: should be one of:
- "x-powers,axp209-adc",
- "x-powers,axp221-adc",
- "x-powers,axp813-adc",
- #io-channel-cells: should be 1,
Example:
&axp22x {
adc {
compatible = "x-powers,axp221-adc";
#io-channel-cells = <1>;
};
};
ADC channels and their indexes per variant:
AXP209
------
0 | acin_v
1 | acin_i
2 | vbus_v
3 | vbus_i
4 | pmic_temp
5 | gpio0_v
6 | gpio1_v
7 | ipsout_v
8 | batt_v
9 | batt_chrg_i
10 | batt_dischrg_i
AXP22x
------
0 | pmic_temp
1 | batt_v
2 | batt_chrg_i
3 | batt_dischrg_i
AXP813
------
0 | pmic_temp
1 | gpio0_v
2 | batt_v
3 | batt_chrg_i
4 | batt_dischrg_i