tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1WM1811/WM8994/WM8958 audio CODEC
2
3These devices support both I2C and SPI (configured with pin strapping
4on the board).
5
6Required properties:
7
8 - compatible : One of "wlf,wm1811", "wlf,wm8994" or "wlf,wm8958".
9
10 - reg : the I2C address of the device for I2C, the chip select
11 number for SPI.
12
13 - gpio-controller : Indicates this device is a GPIO controller.
14 - #gpio-cells : Must be 2. The first cell is the pin number and the
15 second cell is used to specify optional parameters (currently unused).
16
17 - AVDD2-supply, DBVDD1-supply, DBVDD2-supply, DBVDD3-supply, CPVDD-supply,
18 SPKVDD1-supply, SPKVDD2-supply : power supplies for the device, as covered
19 in Documentation/devicetree/bindings/regulator/regulator.txt
20
21Optional properties:
22
23 - interrupts : The interrupt line the IRQ signal for the device is
24 connected to. This is optional, if it is not connected then none
25 of the interrupt related properties should be specified.
26 - interrupt-controller : These devices contain interrupt controllers
27 and may provide interrupt services to other devices if they have an
28 interrupt line connected.
29 - #interrupt-cells: the number of cells to describe an IRQ, this should be 2.
30 The first cell is the IRQ number.
31 The second cell is the flags, encoded as the trigger masks from
32 Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
33
34 - clocks : A list of up to two phandle and clock specifier pairs
35 - clock-names : A list of clock names sorted in the same order as clocks.
36 Valid clock names are "MCLK1" and "MCLK2".
37
38 - wlf,gpio-cfg : A list of GPIO configuration register values. If absent,
39 no configuration of these registers is performed. If any value is
40 over 0xffff then the register will be left as default. If present 11
41 values must be supplied.
42
43 - wlf,micbias-cfg : Two MICBIAS register values for WM1811 or
44 WM8958. If absent the register defaults will be used.
45
46 - wlf,ldo1ena : GPIO specifier for control of LDO1ENA input to device.
47 - wlf,ldo2ena : GPIO specifier for control of LDO2ENA input to device.
48
49 - wlf,lineout1-se : If present LINEOUT1 is in single ended mode.
50 - wlf,lineout2-se : If present LINEOUT2 is in single ended mode.
51
52 - wlf,lineout1-feedback : If present LINEOUT1 has common mode feedback
53 connected.
54 - wlf,lineout2-feedback : If present LINEOUT2 has common mode feedback
55 connected.
56
57 - wlf,ldoena-always-driven : If present LDOENA is always driven.
58
59 - wlf,spkmode-pu : If present enable the internal pull-up resistor on
60 the SPKMODE pin.
61
62 - wlf,csnaddr-pd : If present enable the internal pull-down resistor on
63 the CS/ADDR pin.
64
65Example:
66
67wm8994: codec@1a {
68 compatible = "wlf,wm8994";
69 reg = <0x1a>;
70
71 gpio-controller;
72 #gpio-cells = <2>;
73
74 lineout1-se;
75
76 AVDD2-supply = <®ulator>;
77 CPVDD-supply = <®ulator>;
78 DBVDD1-supply = <®ulator>;
79 DBVDD2-supply = <®ulator>;
80 DBVDD3-supply = <®ulator>;
81 SPKVDD1-supply = <®ulator>;
82 SPKVDD2-supply = <®ulator>;
83};