CS35L35 Boosted Speaker Amplifier Required properties: - compatible : "cirrus,cs35l35" - reg : the I2C address of the device for I2C - VA-supply, VP-supply : power supplies for the device, as covered in Documentation/devicetree/bindings/regulator/regulator.txt. - interrupt-parent : Specifies the phandle of the interrupt controller to which the IRQs from CS35L35 are delivered to. - interrupts : IRQ line info CS35L35. (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt for further information relating to interrupt properties) - cirrus,boost-ind-nanohenry: Inductor value for boost converter. The value is in nH and they can be values of 1000nH, 1200nH, 1500nH, and 2200nH. Optional properties: - reset-gpios : gpio used to reset the amplifier - cirrus,stereo-config : Boolean to determine if there are 2 AMPs for a Stereo configuration - cirrus,audio-channel : Set Location of Audio Signal on Serial Port 0 = Data Packet received on Left I2S Channel 1 = Data Packet received on Right I2S Channel - cirrus,advisory-channel : Set Location of Advisory Signal on Serial Port 0 = Data Packet received on Left I2S Channel 1 = Data Packet received on Right I2S Channel - cirrus,shared-boost : Boolean to enable ClassH tracking of Advisory Signal if 2 Devices share Boost BST_CTL - cirrus,external-boost : Boolean to specify the device is using an external boost supply, note that sharing a boost from another cs35l35 would constitute using an external supply for the slave device - cirrus,sp-drv-strength : Value for setting the Serial Port drive strength Table 3-10 of the datasheet lists drive-strength specifications 0 = 1x (Default) 1 = .5x - cirrus,sp-drv-unused : Determines how unused slots should be driven on the Serial Port. 0 - Hi-Z 2 - Drive 0's (Default) 3 - Drive 1's - cirrus,bst-pdn-fet-on : Boolean to determine if the Boost PDN control powers down with a rectification FET On or Off. If VSPK is supplied externally then FET is off. - cirrus,boost-ctl-millivolt : Boost Voltage Value. Configures the boost converter's output voltage in mV. The range is from 2600mV to 9000mV with increments of 100mV. (Default) VP - cirrus,boost-peak-milliamp : Boost-converter peak current limit in mA. Configures the peak current by monitoring the current through the boost FET. Range starts at 1680mA and goes to a maximum of 4480mA with increments of 110mA. (Default) 2.46 Amps - cirrus,amp-gain-zc : Boolean to determine if to use Amplifier gain-change zero-cross Optional H/G Algorithm sub-node: The cs35l35 node can have a single "cirrus,classh-internal-algo" sub-node that will disable automatic control of the internal H/G Algorithm. It is strongly recommended that the Datasheet be referenced when adjusting or using these Class H Algorithm controls over the internal Algorithm. Serious damage can occur to the Device and surrounding components. - cirrus,classh-internal-algo : Sub-node for the Internal Class H Algorithm See Section 4.3 Internal Class H Algorithm in the Datasheet. If not used, the device manages the ClassH Algorithm internally. Optional properties for the "cirrus,classh-internal-algo" Sub-node Section 7.29 Class H Control - cirrus,classh-bst-overide : Boolean - cirrus,classh-bst-max-limit - cirrus,classh-mem-depth Section 7.30 Class H Headroom Control - cirrus,classh-headroom Section 7.31 Class H Release Rate - cirrus,classh-release-rate Section 7.32 Class H Weak FET Drive Control - cirrus,classh-wk-fet-disable - cirrus,classh-wk-fet-delay - cirrus,classh-wk-fet-thld Section 7.34 Class H VP Control - cirrus,classh-vpch-auto - cirrus,classh-vpch-rate - cirrus,classh-vpch-man Optional Monitor Signal Format sub-node: The cs35l35 node can have a single "cirrus,monitor-signal-format" sub-node for adjusting the Depth, Location and Frame of the Monitoring Signals for Algorithms. See Sections 4.8.2 through 4.8.4 Serial-Port Control in the Datasheet -cirrus,monitor-signal-format : Sub-node for the Monitor Signaling Formating on the I2S Port. Each of the 3 8 bit values in the array contain the settings for depth, location, and frame. If not used, the defaults for the 6 monitor signals is used. Sections 7.44 - 7.53 lists values for the depth, location, and frame for each monitoring signal. - cirrus,imon : 4 8 bit values to set the depth, location, frame and ADC scale of the IMON monitor signal. - cirrus,vmon : 3 8 bit values to set the depth, location, and frame of the VMON monitor signal. - cirrus,vpmon : 3 8 bit values to set the depth, location, and frame of the VPMON monitor signal. - cirrus,vbstmon : 3 8 bit values to set the depth, location, and frame of the VBSTMON monitor signal - cirrus,vpbrstat : 3 8 bit values to set the depth, location, and frame of the VPBRSTAT monitor signal - cirrus,zerofill : 3 8 bit values to set the depth, location, and frame\ of the ZEROFILL packet in the monitor signal Example: cs35l35: cs35l35@20 { compatible = "cirrus,cs35l35"; reg = <0x20>; VA-supply = <&dummy_vreg>; VP-supply = <&dummy_vreg>; reset-gpios = <&axi_gpio 54 0>; interrupt-parent = <&gpio8>; interrupts = <3 IRQ_TYPE_LEVEL_LOW>; cirrus,boost-ctl-millivolt = <9000>; cirrus,stereo-config; cirrus,audio-channel = <0x00>; cirrus,advisory-channel = <0x01>; cirrus,shared-boost; cirrus,classh-internal-algo { cirrus,classh-bst-overide; cirrus,classh-bst-max-limit = <0x01>; cirrus,classh-mem-depth = <0x01>; cirrus,classh-release-rate = <0x08>; cirrus,classh-headroom-millivolt = <0x0B>; cirrus,classh-wk-fet-disable = <0x01>; cirrus,classh-wk-fet-delay = <0x04>; cirrus,classh-wk-fet-thld = <0x01>; cirrus,classh-vpch-auto = <0x01>; cirrus,classh-vpch-rate = <0x02>; cirrus,classh-vpch-man = <0x05>; }; /* Depth, Location, Frame */ cirrus,monitor-signal-format { cirrus,imon = /bits/ 8 <0x03 0x00 0x01>; cirrus,vmon = /bits/ 8 <0x03 0x00 0x00>; cirrus,vpmon = /bits/ 8 <0x03 0x04 0x00>; cirrus,vbstmon = /bits/ 8 <0x03 0x04 0x01>; cirrus,vpbrstat = /bits/ 8 <0x00 0x04 0x00>; cirrus,zerofill = /bits/ 8 <0x00 0x00 0x00>; }; };