06bdf385f6
On the chip the IMON signal is a full 24-bits however normally only some of the bits will be sent over the bus. The chip provides a field to select which bits of the IMON will be sent back, this is the only feedback signal that has this feature. Add an additional entry to the cirrus,imon device tree property to allow the IMON scale parameter to be passed. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Brian Austin <brian.austin@cirrus.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
181 lines
6.0 KiB
Plaintext
181 lines
6.0 KiB
Plaintext
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,external-boost : Boolean to specify the device is using an external
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boost supply, note that sharing a boost from another cs35l35 would constitute
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using an external supply for the slave device
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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,sp-drv-unused : Determines how unused slots should be driven on the
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Serial Port.
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0 - Hi-Z
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2 - Drive 0's (Default)
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3 - Drive 1's
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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 : 4 8 bit values to set the depth, location, frame and ADC
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scale 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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