diff options
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/iio/adc/qcom,pm8018-adc.yaml | 166 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/iio/adc/qcom,pm8xxx-xoadc.txt | 157 |
2 files changed, 166 insertions, 157 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,pm8018-adc.yaml b/Documentation/devicetree/bindings/iio/adc/qcom,pm8018-adc.yaml new file mode 100644 index 000000000000..d186b713d6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/qcom,pm8018-adc.yaml @@ -0,0 +1,166 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/qcom,pm8018-adc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm's PM8xxx voltage XOADC + +maintainers: + - Linus Walleij <linus.walleij@linaro.org> + +description: | + The Qualcomm PM8xxx PMICs contain a HK/XO ADC (Housekeeping/Crystal + oscillator ADC) encompassing PM8018, PM8038, PM8058 and PM8921. + +properties: + compatible: + enum: + - qcom,pm8018-adc + - qcom,pm8038-adc + - qcom,pm8058-adc + - qcom,pm8921-adc + + reg: + maxItems: 1 + description: + ADC base address in the PMIC, typically 0x197. + + xoadc-ref-supply: + description: + The reference voltage may vary with PMIC variant but is typically + something like 2.2 or 1.8V. + + interrupts: + maxItems: 1 + + "#address-cells": + const: 2 + description: + The first cell is the prescaler (on PM8058) or premux (on PM8921) + with two valid bits so legal values are 0x00, 0x01 or 0x02. + The second cell is the main analog mux setting (0x00..0x0f). + The combination of prescaler/premux and analog mux uniquely addresses + a hardware channel on all systems. + + "#size-cells": + const: 0 + + "#io-channel-cells": + const: 2 + description: + The cells are precaler or premux followed by the analog muxing line. + +additionalProperties: false + +required: + - compatible + - reg + - "#io-channel-cells" + - "#address-cells" + - "#size-cells" + - adc-channel@c + - adc-channel@d + - adc-channel@f + +patternProperties: + "^(adc-channel@)[0-9a-f]$": + type: object + description: | + ADC channel specific configuration. + Note that channels c, d and f must be present for calibration. + These three nodes are used for absolute and ratiometric calibration + and only need to have these reg values: they are by hardware definition + 1:1 ratio converters that sample 625, 1250 and 0 milliV and create + an interpolation calibration for all other ADCs. + + properties: + reg: + maxItems: 1 + + qcom,decimation: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + This parameter is used to decrease the ADC sampling rate. + Quicker measurements can be made by reducing the decimation ratio. + Valid values are 512, 1024, 2048, 4096. + If the property is not found, a default value of 512 will be used. + + qcom,ratiometric: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Channel calibration type. If this property is specified + VADC will use a special voltage references for channel + calibration. The available references are specified in the + as a u32 value setting (see below) and it is compulsory + to also specify this reference if ratiometric calibration + is selected. + + If the property is not found, the channel will be + calibrated with the 0.625V and 1.25V reference channels, also + known as an absolute calibration. + + The reference voltage pairs when using ratiometric calibration: + 0 = XO_IN/XOADC_GND + 1 = PMIC_IN/XOADC_GND + 2 = PMIC_IN/BMS_CSP + 3 (invalid) + 4 = XOADC_GND/XOADC_GND + 5 = XOADC_VREF/XOADC_GND + + additionalProperties: false + + required: + - reg + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + pmic { + #address-cells = <1>; + #size-cells = <0>; + + adc@197 { + compatible = "qcom,pm8058-adc"; + reg = <0x197>; + interrupts-extended = <&pm8058 76 IRQ_TYPE_EDGE_RISING>; + #address-cells = <2>; + #size-cells = <0>; + #io-channel-cells = <2>; + + vcoin: adc-channel@0 { + reg = <0x00 0x00>; + }; + vbat: adc-channel@1 { + reg = <0x00 0x01>; + }; + dcin: adc-channel@2 { + reg = <0x00 0x02>; + }; + ichg: adc-channel@3 { + reg = <0x00 0x03>; + }; + vph_pwr: adc-channel@4 { + reg = <0x00 0x04>; + }; + usb_vbus: adc-channel@a { + reg = <0x00 0x0a>; + }; + die_temp: adc-channel@b { + reg = <0x00 0x0b>; + }; + ref_625mv: adc-channel@c { + reg = <0x00 0x0c>; + }; + ref_1250mv: adc-channel@d { + reg = <0x00 0x0d>; + }; + ref_325mv: adc-channel@e { + reg = <0x00 0x0e>; + }; + ref_muxoff: adc-channel@f { + reg = <0x00 0x0f>; + }; + }; + }; +... diff --git a/Documentation/devicetree/bindings/iio/adc/qcom,pm8xxx-xoadc.txt b/Documentation/devicetree/bindings/iio/adc/qcom,pm8xxx-xoadc.txt deleted file mode 100644 index 3ae06127789e..000000000000 --- a/Documentation/devicetree/bindings/iio/adc/qcom,pm8xxx-xoadc.txt +++ /dev/null @@ -1,157 +0,0 @@ -Qualcomm's PM8xxx voltage XOADC - -The Qualcomm PM8xxx PMICs contain a HK/XO ADC (Housekeeping/Crystal -oscillator ADC) encompassing PM8018, PM8038, PM8058 and PM8921. - -Required properties: - -- compatible: should be one of: - "qcom,pm8018-adc" - "qcom,pm8038-adc" - "qcom,pm8058-adc" - "qcom,pm8921-adc" - -- reg: should contain the ADC base address in the PMIC, typically - 0x197. - -- xoadc-ref-supply: should reference a regulator that can supply - a reference voltage on demand. The reference voltage may vary - with PMIC variant but is typically something like 2.2 or 1.8V. - -The following required properties are standard for IO channels, see -iio-bindings.txt for more details, but notice that this particular -ADC has a special addressing scheme that require two cells for -identifying each ADC channel: - -- #address-cells: should be set to <2>, the first cell is the - prescaler (on PM8058) or premux (on PM8921) with two valid bits - so legal values are 0x00, 0x01 or 0x02. The second cell - is the main analog mux setting (0x00..0x0f). The combination - of prescaler/premux and analog mux uniquely addresses a hardware - channel on all systems. - -- #size-cells: should be set to <0> - -- #io-channel-cells: should be set to <2>, again the cells are - precaler or premux followed by the analog muxing line. - -- interrupts: should refer to the parent PMIC interrupt controller - and reference the proper ADC interrupt. - -Required subnodes: - -The ADC channels are configured as subnodes of the ADC. - -Since some of them are used for calibrating the ADC, these nodes are -compulsory: - -adc-channel@c { - reg = <0x00 0x0c>; -}; - -adc-channel@d { - reg = <0x00 0x0d>; -}; - -adc-channel@f { - reg = <0x00 0x0f>; -}; - -These three nodes are used for absolute and ratiometric calibration -and only need to have these reg values: they are by hardware definition -1:1 ratio converters that sample 625, 1250 and 0 milliV and create -an interpolation calibration for all other ADCs. - -Optional subnodes: any channels other than channels [0x00 0x0c], -[0x00 0x0d] and [0x00 0x0f] are optional. - -Required channel node properties: - -- reg: should contain the hardware channel number in the range - 0 .. 0xff (8 bits). - -Optional channel node properties: - -- qcom,decimation: - Value type: <u32> - Definition: This parameter is used to decrease the ADC sampling rate. - Quicker measurements can be made by reducing the decimation ratio. - Valid values are 512, 1024, 2048, 4096. - If the property is not found, a default value of 512 will be used. - -- qcom,ratiometric: - Value type: <u32> - Definition: Channel calibration type. If this property is specified - VADC will use a special voltage references for channel - calibration. The available references are specified in the - as a u32 value setting (see below) and it is compulsory - to also specify this reference if ratiometric calibration - is selected. - - If the property is not found, the channel will be - calibrated with the 0.625V and 1.25V reference channels, also - known as an absolute calibration. - The reference voltage pairs when using ratiometric calibration: - 0 = XO_IN/XOADC_GND - 1 = PMIC_IN/XOADC_GND - 2 = PMIC_IN/BMS_CSP - 3 (invalid) - 4 = XOADC_GND/XOADC_GND - 5 = XOADC_VREF/XOADC_GND - -Example: - -xoadc: xoadc@197 { - compatible = "qcom,pm8058-adc"; - reg = <0x197>; - interrupts-extended = <&pm8058 76 IRQ_TYPE_EDGE_RISING>; - #address-cells = <2>; - #size-cells = <0>; - #io-channel-cells = <2>; - - vcoin: adc-channel@0 { - reg = <0x00 0x00>; - }; - vbat: adc-channel@1 { - reg = <0x00 0x01>; - }; - dcin: adc-channel@2 { - reg = <0x00 0x02>; - }; - ichg: adc-channel@3 { - reg = <0x00 0x03>; - }; - vph_pwr: adc-channel@4 { - reg = <0x00 0x04>; - }; - usb_vbus: adc-channel@a { - reg = <0x00 0x0a>; - }; - die_temp: adc-channel@b { - reg = <0x00 0x0b>; - }; - ref_625mv: adc-channel@c { - reg = <0x00 0x0c>; - }; - ref_1250mv: adc-channel@d { - reg = <0x00 0x0d>; - }; - ref_325mv: adc-channel@e { - reg = <0x00 0x0e>; - }; - ref_muxoff: adc-channel@f { - reg = <0x00 0x0f>; - }; -}; - -/* IIO client node */ -iio-hwmon { - compatible = "iio-hwmon"; - io-channels = <&xoadc 0x00 0x01>, /* Battery */ - <&xoadc 0x00 0x02>, /* DC in (charger) */ - <&xoadc 0x00 0x04>, /* VPH the main system voltage */ - <&xoadc 0x00 0x0b>, /* Die temperature */ - <&xoadc 0x00 0x0c>, /* Reference voltage 1.25V */ - <&xoadc 0x00 0x0d>, /* Reference voltage 0.625V */ - <&xoadc 0x00 0x0e>; /* Reference voltage 0.325V */ -}; |