mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 13:51:44 +00:00
791d3ef2e1
'interrupt-parent' is often documented as part of define bindings, but it is really outside the scope of a device binding. It's never required in a given node as it is often inherited from a parent node. Or it can be implicit if a parent node is an 'interrupt-controller' node. So remove it from all the binding files. Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
125 lines
4.7 KiB
Plaintext
125 lines
4.7 KiB
Plaintext
CS35L33 Speaker Amplifier
|
|
|
|
Required properties:
|
|
|
|
- compatible : "cirrus,cs35l33"
|
|
|
|
- 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.
|
|
|
|
Optional properties:
|
|
|
|
- reset-gpios : gpio used to reset the amplifier
|
|
|
|
- interrupts : IRQ line info CS35L33.
|
|
(See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
|
|
for further information relating to interrupt properties)
|
|
|
|
- cirrus,boost-ctl : Booster voltage use to supply the amp. If the value is
|
|
0, then VBST = VP. If greater than 0, the boost voltage will be 3300mV with
|
|
a value of 1 and will increase at a step size of 100mV until a maximum of
|
|
8000mV.
|
|
|
|
- cirrus,ramp-rate : On power up, it affects the time from when the power
|
|
up sequence begins to the time the audio reaches a full-scale output.
|
|
On power down, it affects the time from when the power-down sequence
|
|
begins to when the amplifier disables the PWM outputs. If this property
|
|
is not set then soft ramping will be disabled and ramp time would be
|
|
20ms. If this property is set to 0,1,2,3 then ramp times would be 40ms,
|
|
60ms,100ms,175ms respectively for 48KHz sample rate.
|
|
|
|
- cirrus,boost-ipk : The maximum current allowed for the boost converter.
|
|
The range starts at 1850000uA and goes to a maximum of 3600000uA
|
|
with a step size of 15625uA. The default is 2500000uA.
|
|
|
|
- cirrus,imon-adc-scale : Configures the scaling of data bits from the IMON
|
|
ADC data word. This property can be set as a value of 0 for bits 15 down
|
|
to 0, 6 for 21 down to 6, 7, for 22 down to 7, 8 for 23 down to 8.
|
|
|
|
|
|
Optional H/G Algorithm sub-node:
|
|
|
|
The cs35l33 node can have a single "cirrus,hg-algo" sub-node that will enable
|
|
the internal H/G Algorithm.
|
|
|
|
- cirrus,hg-algo : Sub-node for internal Class H/G algorithm that
|
|
controls the amplifier supplies.
|
|
|
|
Optional properties for the "cirrus,hg-algo" sub-node:
|
|
|
|
- cirrus,mem-depth : Memory depth for the Class H/G algorithm measured in
|
|
LRCLK cycles. If this property is set to 0, 1, 2, or 3 then the memory
|
|
depths will be 1, 4, 8, 16 LRCLK cycles. The default is 16 LRCLK cycles.
|
|
|
|
cirrus,release-rate : The number of consecutive LRCLK periods before
|
|
allowing release condition tracking updates. The number of LRCLK periods
|
|
start at 3 to a maximum of 255.
|
|
|
|
- cirrus,ldo-thld : Configures the signal threshold at which the PWM output
|
|
stage enters LDO operation. Starts as a default value of 50mV for a value
|
|
of 1 and increases with a step size of 50mV to a maximum of 750mV (value of
|
|
0xF).
|
|
|
|
- cirrus,ldo-path-disable : This is a boolean property. If present, the H/G
|
|
algorithm uses the max detection path. If not present, the LDO
|
|
detection path is used.
|
|
|
|
- cirrus,ldo-entry-delay : The LDO entry delay in milliseconds before the H/G
|
|
algorithm switches to the LDO voltage. This property can be set to values
|
|
from 0 to 7 for delays of 5ms, 10ms, 50ms, 100ms, 200ms, 500ms, 1000ms.
|
|
The default is 100ms.
|
|
|
|
- cirrus,vp-hg-auto : This is a boolean property. When set, class H/G VPhg
|
|
automatic updating is enabled.
|
|
|
|
- cirrus,vp-hg : Class H/G algorithm VPhg. Controls the H/G algorithm's
|
|
reference to the VP voltage for when to start generating a boosted VBST.
|
|
The reference voltage starts at 3000mV with a value of 0x3 and is increased
|
|
by 100mV per step to a maximum of 5500mV.
|
|
|
|
- cirrus,vp-hg-rate : The rate (number of LRCLK periods) at which the VPhg is
|
|
allowed to increase to a higher voltage when using VPhg automatic
|
|
tracking. This property can be set to values from 0 to 3 with rates of 128
|
|
periods, 2048 periods, 32768 periods, and 524288 periods.
|
|
The default is 32768 periods.
|
|
|
|
- cirrus,vp-hg-va : VA calculation reference for automatic VPhg tracking
|
|
using VPMON. This property can be set to values from 0 to 6 starting at
|
|
1800mV with a step size of 50mV up to a maximum value of 1750mV.
|
|
Default is 1800mV.
|
|
|
|
Example:
|
|
|
|
cs35l33: cs35l33@40 {
|
|
compatible = "cirrus,cs35l33";
|
|
reg = <0x40>;
|
|
|
|
VA-supply = <&ldo5_reg>;
|
|
VP-supply = <&ldo5_reg>;
|
|
|
|
interrupt-parent = <&gpio8>;
|
|
interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
|
|
|
|
reset-gpios = <&cs47l91 34 0>;
|
|
|
|
cirrus,ramp-rate = <0x0>;
|
|
cirrus,boost-ctl = <0x30>; /* VBST = 8000mV */
|
|
cirrus,boost-ipk = <0xE0>; /* 3600mA */
|
|
cirrus,imon-adc-scale = <0> /* Bits 15 down to 0 */
|
|
|
|
cirrus,hg-algo {
|
|
cirrus,mem-depth = <0x3>;
|
|
cirrus,release-rate = <0x3>;
|
|
cirrus,ldo-thld = <0x1>;
|
|
cirrus,ldo-path-disable = <0x0>;
|
|
cirrus,ldo-entry-delay=<0x4>;
|
|
cirrus,vp-hg-auto;
|
|
cirrus,vp-hg=<0xF>;
|
|
cirrus,vp-hg-rate=<0x2>;
|
|
cirrus,vp-hg-va=<0x0>;
|
|
};
|
|
};
|