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117 lines
4.0 KiB
117 lines
4.0 KiB
3 years ago
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Cirrus Logic Tacna class audio codecs extcon driver
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The extcon configuration settings are a child node of the parent MFD driver
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binding.
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See Documentation/devicetree/bindings/mfd/tacna.txt
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This node contains one or more child nodes to describe the configuration for
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each accessory detect.
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Mandatory properties:
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- compatible : must be "cirrus,tacna-extcon"
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- #address-cells : must be 1
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- #size-cells : must be 0
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Optional properties:
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- cirrus,gpsw : Settings for the general purpose switches, set as per the
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SWn_MODE bits in the GP_SWITCH register. If given must be 2 cells.
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First cell is the value for the GPSW1_MODE
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Second cell is the value for the GPSW2_MODE
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Child node mandatory properties:
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- reg : output number this configuration applies to, must be 1
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Child node optional properties:
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- cirrus,micd-detect-debounce-ms : Additional software microphone detection
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debounce specified in milliseconds
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- cirrus,micd-manual-debounce : Additional software button detection
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debounce specified as a number
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- cirrus,micd-bias-start-time : Time allowed for MICBIAS to startup prior to
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performing microphone detection, specified as per the MICDn_DELAY
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bits in the register MICDET_CONTROL1
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- cirrus,micd-pol-gpio : GPIO specifier for the GPIO controlling the headset
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polarity if one exists
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- cirrus,micd-rate : Delay between successive microphone detection
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measurements, specified as per the MICDn_RATE bits in the register
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MICDETn_CONTROL1
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- cirrus,micd-dbtime : Microphone detection hardware debounce level, specified
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as per the MICDn_DBTIME bits in the register MICDET_CONTROL1
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- cirrus,micd-timeout-ms : Timeout for microphone detection, specified in
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milliseconds
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- cirrus,micd-software-compare : Use a software comparison to determine mic
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presence
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- cirrus,fixed-hpdet-imp : Do not perform any headphone detection, just use
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the fixed value specified here as the headphone impedance. Value is in
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hundredths-of-an-ohm (ohms * 100)
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- cirrus,hpdet-ext-res : Impedance of external series resistor on hpdet.
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Value is in hundredths-of-an-ohm (ohms * 100)
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- cirrus,hpdet-short-circuit-imp : Specifies the maximum impedance in ohms
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that will be considered as a short circuit
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- cirrus,hpdet-channel : Set which channel is used for headphone impedance
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measurement. 0 = left, 1 = right
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- cirrus,micd-clamp-mode : Specifies the logic of the micdetect clamp block
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- cirrus,hpd-pins : 4 cells specifying the clamp and sense pins to use.
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<clamp_left sense_left clamp_right sense_right>
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where clamp_x is the clamp pin for channel x and sense_x is the impedance
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sense pin for channel x, as per the HPD_OUT_SEL field of HPDET1_CONTROL1
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register. A value >0xFFFF means use the default.
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- cirrus,micd-configs : Headset polarity configurations, variable length but
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must be a multiple of 5 cells, each 5-cell group represents one
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polarity configuration
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first cell is the value of MICDn_SENSE_SEL register field
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second cell is the accessory detection ground as per the MICDn_GND_SEL
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register field
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the third cell is the MICBIAS to be used as per the MICDn_BIAS_SRC register
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field
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fourth cell is the value of the micd-pol-gpio pin, a non-zero value
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indicates this should be on
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fifth cell is the value of HPn_GND_SEL register field
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- cirrus,accdet-dbtime : Set accessory detection hardware debounce level,
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as per the ACCDET_DBTIME bits in the register TACNA_ACCDET_DEBOUNCE
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Example:
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codec: cs47l96@0 {
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compatible = "cirrus,cs47l96";
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accdet {
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compatible = "cirrus,tacna-extcon";
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#address-cells = <1>;
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#size-cells = <0>;
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cirrus,gpsw = <3 0>;
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cirrus,micd-pol-gpios = <&gpio 0>
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acc@1 {
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reg = <1>;
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cirrus,micd-detect-debounce-ms = <10>;
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cirrus,micd-bias-start-time = <0x1>;
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cirrus,micd-rate = <0x1>;
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cirrus,micd-dbtime = <0x1>;
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cirrus,micd-timeout-ms = <10>;
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cirrus,micd-configs = <
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0x1 0 1 0 2
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0x0 0 2 1 2
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>;
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cirrus,accdet-dbtime =<0x1>;
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};
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};
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};
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