Qualcomm PMIC Multi-Purpose Pin (MPP) block
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This binding describes the MPP block(s) found in the 8xxx series
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of PMIC's from Qualcomm.
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- compatible:
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Usage: required
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Value type: <string>
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Definition: Should contain one of:
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"qcom,pm8018-mpp",
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"qcom,pm8038-mpp",
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"qcom,pm8058-mpp",
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"qcom,pm8821-mpp",
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"qcom,pm8841-mpp",
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"qcom,pm8916-mpp",
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"qcom,pm8917-mpp",
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"qcom,pm8921-mpp",
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"qcom,pm8941-mpp",
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"qcom,pm8994-mpp",
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"qcom,pma8084-mpp",
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And must contain either "qcom,spmi-mpp" or "qcom,ssbi-mpp"
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if the device is on an spmi bus or an ssbi bus respectively.
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- reg:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Register base of the MPP block and length.
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- interrupts:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Must contain an array of encoded interrupt specifiers for
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each available MPP
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- gpio-controller:
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Usage: required
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Value type: <none>
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Definition: Mark the device node as a GPIO controller
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- #gpio-cells:
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Usage: required
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Value type: <u32>
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Definition: Must be 2;
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the first cell will be used to define MPP number and the
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second denotes the flags for this MPP
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Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
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a general description of GPIO and interrupt bindings.
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Please refer to pinctrl-bindings.txt in this directory for details of the
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common pinctrl bindings used by client devices, including the meaning of the
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phrase "pin configuration node".
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The pin configuration nodes act as a container for an arbitrary number of
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subnodes. Each of these subnodes represents some desired configuration for a
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pin or a list of pins. This configuration can include the
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mux function to select on those pin(s), and various pin configuration
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parameters, as listed below.
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SUBNODES:
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The name of each subnode is not important; all subnodes should be enumerated
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and processed purely based on their content.
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Each subnode only affects those parameters that are explicitly listed. In
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other words, a subnode that lists a mux function but no pin configuration
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parameters implies no information about any pin configuration parameters.
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Similarly, a pin subnode that describes a pullup parameter implies no
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information about e.g. the mux function.
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The following generic properties as defined in pinctrl-bindings.txt are valid
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to specify in a pin configuration subnode:
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- pins:
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Usage: required
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Value type: <string-array>
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Definition: List of MPP pins affected by the properties specified in
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this subnode. Valid pins are:
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mpp1-mpp4 for pm8841
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mpp1-mpp4 for pm8916
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mpp1-mpp8 for pm8941
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mpp1-mpp4 for pma8084
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- function:
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Usage: required
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Value type: <string>
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Definition: Specify the alternative function to be configured for the
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specified pins. Valid values are:
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"digital",
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"analog",
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"sink"
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- bias-disable:
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Usage: optional
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Value type: <none>
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Definition: The specified pins should be configured as no pull.
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- bias-pull-up:
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Usage: optional
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Value type: <u32>
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Definition: The specified pins should be configured as pull up.
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Valid values are 600, 10000 and 30000 in bidirectional mode
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only, i.e. when operating in qcom,analog-mode and input and
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outputs are enabled. The hardware ignores the configuration
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when operating in other modes.
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- bias-high-impedance:
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Usage: optional
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Value type: <none>
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Definition: The specified pins will put in high-Z mode and disabled.
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- input-enable:
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Usage: optional
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Value type: <none>
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Definition: The specified pins are put in input mode, i.e. their input
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buffer is enabled
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- output-high:
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Usage: optional
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Value type: <none>
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Definition: The specified pins are configured in output mode, driven
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high.
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- output-low:
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Usage: optional
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Value type: <none>
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Definition: The specified pins are configured in output mode, driven
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low.
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- power-source:
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Usage: optional
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Value type: <u32>
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Definition: Selects the power source for the specified pins. Valid power
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sources are defined in <dt-bindings/pinctrl/qcom,pmic-mpp.h>
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- qcom,analog-level:
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Usage: optional
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Value type: <u32>
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Definition: Selects the source for analog output. Valued values are
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defined in <dt-binding/pinctrl/qcom,pmic-mpp.h>
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PMIC_MPP_AOUT_LVL_*
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- qcom,dtest:
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Usage: optional
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Value type: <u32>
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Definition: Selects which dtest rail to be routed in the various functions.
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Valid values are 1-4
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- qcom,amux-route:
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Usage: optional
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Value type: <u32>
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Definition: Selects the source for analog input. Valid values are
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defined in <dt-bindings/pinctrl/qcom,pmic-mpp.h>
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PMIC_MPP_AMUX_ROUTE_CH5, PMIC_MPP_AMUX_ROUTE_CH6...
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- qcom,paired:
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Usage: optional
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Value type: <none>
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Definition: Indicates that the pin should be operating in paired mode.
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Example:
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mpps@a000 {
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compatible = "qcom,pm8841-mpp", "qcom,spmi-mpp";
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reg = <0xa000>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupts = <4 0xa0 0 0>, <4 0xa1 0 0>, <4 0xa2 0 0>, <4 0xa3 0 0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pm8841_default>;
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pm8841_default: default {
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gpio {
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pins = "mpp1", "mpp2", "mpp3", "mpp4";
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function = "digital";
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input-enable;
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power-source = <PM8841_MPP_S3>;
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};
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};
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};
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