xref: /linux/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.yaml (revision 24bce201d79807b668bf9d9e0aca801c5c0d5f78) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iio/adc/amlogic,meson-saradc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Amlogic Meson SAR (Successive Approximation Register) A/D converter
8
9maintainers:
10  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
11
12description:
13  Binding covers a range of ADCs found on Amlogic Meson SoCs.
14
15properties:
16  compatible:
17    oneOf:
18      - const: amlogic,meson-saradc
19      - items:
20          - enum:
21              - amlogic,meson8-saradc
22              - amlogic,meson8b-saradc
23              - amlogic,meson8m2-saradc
24              - amlogic,meson-gxbb-saradc
25              - amlogic,meson-gxl-saradc
26              - amlogic,meson-gxm-saradc
27              - amlogic,meson-axg-saradc
28              - amlogic,meson-g12a-saradc
29          - const: amlogic,meson-saradc
30
31  reg:
32    maxItems: 1
33
34  interrupts:
35    description: Interrupt indicates end of sampling.
36    maxItems: 1
37
38  clocks:
39    minItems: 2
40    maxItems: 4
41
42  clock-names:
43    minItems: 2
44    items:
45      - const: clkin
46      - const: core
47      - const: adc_clk
48      - const: adc_sel
49
50  vref-supply: true
51
52  "#io-channel-cells":
53    const: 1
54
55  amlogic,hhi-sysctrl:
56    $ref: /schemas/types.yaml#/definitions/phandle
57    description:
58      Syscon which contains the 5th bit of the TSC (temperature sensor
59      coefficient) on Meson8b and Meson8m2 (which used to calibrate the
60      temperature sensor)
61
62  nvmem-cells:
63    description: phandle to the temperature_calib eFuse cells
64    maxItems: 1
65
66  nvmem-cell-names:
67    const: temperature_calib
68
69allOf:
70  - if:
71      properties:
72        compatible:
73          contains:
74            enum:
75              - amlogic,meson8-saradc
76              - amlogic,meson8b-saradc
77              - amlogic,meson8m2-saradc
78    then:
79      properties:
80        clocks:
81          maxItems: 2
82        clock-names:
83          maxItems: 2
84    else:
85      properties:
86        nvmem-cells: false
87        mvmem-cel-names: false
88        clocks:
89          minItems: 4
90        clock-names:
91          minItems: 4
92
93  - if:
94      properties:
95        compatible:
96          contains:
97            enum:
98              - amlogic,meson8b-saradc
99              - amlogic,meson8m2-saradc
100    then:
101      properties:
102        amlogic,hhi-sysctrl: true
103    else:
104      properties:
105        amlogic,hhi-sysctrl: false
106
107required:
108  - compatible
109  - reg
110  - interrupts
111  - clocks
112  - clock-names
113  - "#io-channel-cells"
114
115additionalProperties: false
116
117examples:
118  - |
119    #include <dt-bindings/interrupt-controller/irq.h>
120    #include <dt-bindings/clock/gxbb-clkc.h>
121    #include <dt-bindings/interrupt-controller/arm-gic.h>
122    soc {
123        #address-cells = <2>;
124        #size-cells = <2>;
125        adc@8680 {
126            compatible = "amlogic,meson-gxl-saradc", "amlogic,meson-saradc";
127            #io-channel-cells = <1>;
128            reg = <0x0 0x8680 0x0 0x34>;
129            interrupts = <GIC_SPI 73 IRQ_TYPE_EDGE_RISING>;
130            clocks = <&xtal>,
131                <&clkc CLKID_SAR_ADC>,
132                <&clkc CLKID_SAR_ADC_CLK>,
133                <&clkc CLKID_SAR_ADC_SEL>;
134            clock-names = "clkin", "core", "adc_clk", "adc_sel";
135        };
136        adc@9680 {
137            compatible = "amlogic,meson8b-saradc", "amlogic,meson-saradc";
138            #io-channel-cells = <1>;
139            reg = <0x0 0x9680 0x0 0x34>;
140            interrupts = <GIC_SPI 73 IRQ_TYPE_EDGE_RISING>;
141            clocks = <&xtal>, <&clkc CLKID_SAR_ADC>;
142            clock-names = "clkin", "core";
143            nvmem-cells = <&tsens_caldata>;
144            nvmem-cell-names = "temperature_calib";
145            amlogic,hhi-sysctrl = <&hhi>;
146        };
147    };
148...
149