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ASoC: cs35l35: Add bindings file for CS35L35
Add bindings documentation for CS35L35 Amplifier Signed-off-by: Brian Austin <brian.austin@cirrus.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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Brian Austin
Mark Brown
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6387f866a2
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ed864461bf
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CS35L35 Boosted Speaker Amplifier
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Required properties:
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- compatible : "cirrus,cs35l35"
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- reg : the I2C address of the device for I2C
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- VA-supply, VP-supply : power supplies for the device,
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as covered in
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Documentation/devicetree/bindings/regulator/regulator.txt.
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- interrupt-parent : Specifies the phandle of the interrupt controller to
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which the IRQs from CS35L35 are delivered to.
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- interrupts : IRQ line info CS35L35.
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(See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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for further information relating to interrupt properties)
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Optional properties:
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- reset-gpios : gpio used to reset the amplifier
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- cirrus,stereo-config : Boolean to determine if there are 2 AMPs for a
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Stereo configuration
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- cirrus,audio-channel : Set Location of Audio Signal on Serial Port
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0 = Data Packet received on Left I2S Channel
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1 = Data Packet received on Right I2S Channel
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- cirrus,advisory-channel : Set Location of Advisory Signal on Serial Port
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0 = Data Packet received on Left I2S Channel
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1 = Data Packet received on Right I2S Channel
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- cirrus,shared-boost : Boolean to enable ClassH tracking of Advisory Signal
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if 2 Devices share Boost BST_CTL
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- cirrus,sp-drv-strength : Value for setting the Serial Port drive strength
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Table 3-10 of the datasheet lists drive-strength specifications
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0 = 1x (Default)
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1 = .5x
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- cirrus,bst-pdn-fet-on : Boolean to determine if the Boost PDN control
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powers down with a rectification FET On or Off. If VSPK is supplied
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externally then FET is off.
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- cirrus,boost-ctl-millivolt : Boost Voltage Value. Configures the boost
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converter's output voltage in mV. The range is from 2600mV to 9000mV with
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increments of 100mV.
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(Default) VP
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- cirrus,boost-peak-milliamp : Boost-converter peak current limit in mA.
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Configures the peak current by monitoring the current through the boost FET.
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Range starts at 1680mA and goes to a maximum of 4480mA with increments of
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110mA.
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(Default) 2.46 Amps
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- cirrus,amp-gain-zc : Boolean to determine if to use Amplifier gain-change
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zero-cross
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Optional H/G Algorithm sub-node:
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The cs35l35 node can have a single "cirrus,classh-internal-algo" sub-node
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that will disable automatic control of the internal H/G Algorithm.
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It is strongly recommended that the Datasheet be referenced when adjusting
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or using these Class H Algorithm controls over the internal Algorithm.
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Serious damage can occur to the Device and surrounding components.
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- cirrus,classh-internal-algo : Sub-node for the Internal Class H Algorithm
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See Section 4.3 Internal Class H Algorithm in the Datasheet.
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If not used, the device manages the ClassH Algorithm internally.
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Optional properties for the "cirrus,classh-internal-algo" Sub-node
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Section 7.29 Class H Control
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- cirrus,classh-bst-overide : Boolean
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- cirrus,classh-bst-max-limit
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- cirrus,classh-mem-depth
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Section 7.30 Class H Headroom Control
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- cirrus,classh-headroom
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Section 7.31 Class H Release Rate
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- cirrus,classh-release-rate
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Section 7.32 Class H Weak FET Drive Control
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- cirrus,classh-wk-fet-disable
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- cirrus,classh-wk-fet-delay
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- cirrus,classh-wk-fet-thld
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Section 7.34 Class H VP Control
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- cirrus,classh-vpch-auto
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- cirrus,classh-vpch-rate
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- cirrus,classh-vpch-man
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Optional Monitor Signal Format sub-node:
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The cs35l35 node can have a single "cirrus,monitor-signal-format" sub-node
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for adjusting the Depth, Location and Frame of the Monitoring Signals
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for Algorithms.
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See Sections 4.8.2 through 4.8.4 Serial-Port Control in the Datasheet
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-cirrus,monitor-signal-format : Sub-node for the Monitor Signaling Formating
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on the I2S Port. Each of the 3 8 bit values in the array contain the settings
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for depth, location, and frame.
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If not used, the defaults for the 6 monitor signals is used.
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Sections 7.44 - 7.53 lists values for the depth, location, and frame
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for each monitoring signal.
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- cirrus,imon : 3 8 bit values to set the depth, location, and frame
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of the IMON monitor signal.
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- cirrus,vmon : 3 8 bit values to set the depth, location, and frame
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of the VMON monitor signal.
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- cirrus,vpmon : 3 8 bit values to set the depth, location, and frame
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of the VPMON monitor signal.
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- cirrus,vbstmon : 3 8 bit values to set the depth, location, and frame
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of the VBSTMON monitor signal
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- cirrus,vpbrstat : 3 8 bit values to set the depth, location, and frame
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of the VPBRSTAT monitor signal
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- cirrus,zerofill : 3 8 bit values to set the depth, location, and frame\
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of the ZEROFILL packet in the monitor signal
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Example:
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cs35l35: cs35l35@20 {
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compatible = "cirrus,cs35l35";
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reg = <0x20>;
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VA-supply = <&dummy_vreg>;
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VP-supply = <&dummy_vreg>;
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reset-gpios = <&axi_gpio 54 0>;
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interrupt-parent = <&gpio8>;
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interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
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cirrus,boost-ctl-millivolt = <9000>;
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cirrus,stereo-config;
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cirrus,audio-channel = <0x00>;
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cirrus,advisory-channel = <0x01>;
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cirrus,shared-boost;
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cirrus,classh-internal-algo {
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cirrus,classh-bst-overide;
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cirrus,classh-bst-max-limit = <0x01>;
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cirrus,classh-mem-depth = <0x01>;
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cirrus,classh-release-rate = <0x08>;
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cirrus,classh-headroom-millivolt = <0x0B>;
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cirrus,classh-wk-fet-disable = <0x01>;
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cirrus,classh-wk-fet-delay = <0x04>;
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cirrus,classh-wk-fet-thld = <0x01>;
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cirrus,classh-vpch-auto = <0x01>;
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cirrus,classh-vpch-rate = <0x02>;
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cirrus,classh-vpch-man = <0x05>;
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};
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/* Depth, Location, Frame */
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cirrus,monitor-signal-format {
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cirrus,imon = /bits/ 8 <0x03 0x00 0x01>;
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cirrus,vmon = /bits/ 8 <0x03 0x00 0x00>;
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cirrus,vpmon = /bits/ 8 <0x03 0x04 0x00>;
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cirrus,vbstmon = /bits/ 8 <0x03 0x04 0x01>;
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cirrus,vpbrstat = /bits/ 8 <0x00 0x04 0x00>;
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cirrus,zerofill = /bits/ 8 <0x00 0x00 0x00>;
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};
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};
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