tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ASoC: cs42l56: bindings: sound: Add bindings for CS42L56 CODEC
This patch adds binding documentation for the Cirrus Logic CS42L56 Low Power Stereo I2C CODEC
Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
authored by
Brian Austin
and committed by
Mark Brown
3bb40619
272b5edd
+63
+63
Documentation/devicetree/bindings/sound/cs42l56.txt
+63
Documentation/devicetree/bindings/sound/cs42l56.txt
···
1
+
CS42L52 audio CODEC
2
+
3
+
Required properties:
4
+
5
+
- compatible : "cirrus,cs42l56"
6
+
7
+
- reg : the I2C address of the device for I2C
8
+
9
+
- VA-supply, VCP-supply, VLDO-supply : power supplies for the device,
10
+
as covered in Documentation/devicetree/bindings/regulator/regulator.txt.
11
+
12
+
Optional properties:
13
+
14
+
- cirrus,gpio-nreset : GPIO controller's phandle and the number
15
+
of the GPIO used to reset the codec.
16
+
17
+
- cirrus,chgfreq-divisor : Values used to set the Charge Pump Frequency.
18
+
Allowable values of 0x00 through 0x0F. These are raw values written to the
19
+
register, not the actual frequency. The frequency is determined by the following.
20
+
Frequency = MCLK / 4 * (N+2)
21
+
N = chgfreq_val
22
+
MCLK = Where MCLK is the frequency of the mclk signal after the MCLKDIV2 circuit.
23
+
24
+
- cirrus,ain1a-ref-cfg, ain1b-ref-cfg : boolean, If present, AIN1A or AIN1B are configured
25
+
as a pseudo-differential input referenced to AIN1REF/AIN3A.
26
+
27
+
- cirrus,ain2a-ref-cfg, ain2b-ref-cfg : boolean, If present, AIN2A or AIN2B are configured
28
+
as a pseudo-differential input referenced to AIN2REF/AIN3B.
29
+
30
+
- cirrus,micbias-lvl: Set the output voltage level on the MICBIAS Pin.
31
+
0 = 0.5 x VA
32
+
1 = 0.6 x VA
33
+
2 = 0.7 x VA
34
+
3 = 0.8 x VA
35
+
4 = 0.83 x VA
36
+
5 = 0.91 x VA
37
+
38
+
- cirrus,adaptive-pwr-cfg : Configures how the power to the Headphone and Lineout
39
+
Amplifiers adapt to the output signal levels.
40
+
0 = Adapt to Volume Mode. Voltage level determined by the sum of the relevant volume settings.
41
+
1 = Fixed - Headphone and Line Amp supply = + or - VCP/2.
42
+
2 = Fixed - Headphone and Line Amp supply = + or - VCP.
43
+
3 = Adapted to Signal; Voltage level is dynamically determined by the output signal.
44
+
45
+
- cirrus,hpf-left-freq, hpf-right-freq : Sets the corner frequency (-3dB point) for the internal High-Pass
46
+
Filter.
47
+
0 = 1.8Hz
48
+
1 = 119Hz
49
+
2 = 236Hz
50
+
3 = 464Hz
51
+
52
+
53
+
Example:
54
+
55
+
codec: codec@4b {
56
+
compatible = "cirrus,cs42l56";
57
+
reg = <0x4b>;
58
+
gpio-reset = <&gpio 10 0>;
59
+
cirrus,chgfreq-divisor = <0x05>;
60
+
cirrus.ain1_ref_cfg;
61
+
cirrus,micbias-lvl = <5>;
62
+
VA-supply = <®_audio>;
63
+
};