1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/hwmon/adt74 4 $id: http://devicetree.org/schemas/hwmon/adt7475.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: ADT7475 hwmon sensor 7 title: ADT7475 hwmon sensor
8 8
9 maintainers: 9 maintainers:
10 - Jean Delvare <jdelvare@suse.com> 10 - Jean Delvare <jdelvare@suse.com>
11 11
12 description: | 12 description: |
13 The ADT7473, ADT7475, ADT7476, and ADT7490 a 13 The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple
14 PWN fan controllers. 14 PWN fan controllers.
15 15
16 They support monitoring and controlling up t 16 They support monitoring and controlling up to four fans (the ADT7490 can only
17 control up to three). They support reading a 17 control up to three). They support reading a single on chip temperature
18 sensor and two off chip temperature sensors 18 sensor and two off chip temperature sensors (the ADT7490 additionally
19 supports measuring up to three current exter 19 supports measuring up to three current external temperature sensors with
20 series resistance cancellation (SRC)). 20 series resistance cancellation (SRC)).
21 21
22 Datasheets: 22 Datasheets:
23 https://www.onsemi.com/pub/Collateral/ADT747 23 https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF
24 https://www.onsemi.com/pub/Collateral/ADT747 24 https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF
25 https://www.onsemi.com/pub/Collateral/ADT747 25 https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF
26 https://www.onsemi.com/pub/Collateral/ADT749 26 https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF
27 27
28 Description taken from onsemiconductors spec 28 Description taken from onsemiconductors specification sheets, with minor
29 rephrasing. 29 rephrasing.
30 30
31 properties: 31 properties:
32 compatible: 32 compatible:
33 enum: 33 enum:
34 - adi,adt7473 34 - adi,adt7473
35 - adi,adt7475 35 - adi,adt7475
36 - adi,adt7476 36 - adi,adt7476
37 - adi,adt7490 37 - adi,adt7490
38 38
39 reg: 39 reg:
40 maxItems: 1 40 maxItems: 1
41 41
42 adi,pwm-active-state: 42 adi,pwm-active-state:
43 description: | 43 description: |
44 Integer array, represents the active sta 44 Integer array, represents the active state of the pwm outputs If set to 0
45 the pwm uses a logic low output for 100% 45 the pwm uses a logic low output for 100% duty cycle. If set to 1 the pwm
46 uses a logic high output for 100% duty c 46 uses a logic high output for 100% duty cycle.
47 $ref: /schemas/types.yaml#/definitions/uin 47 $ref: /schemas/types.yaml#/definitions/uint32-array
48 deprecated: true 48 deprecated: true
49 minItems: 3 49 minItems: 3
50 maxItems: 3 50 maxItems: 3
51 items: 51 items:
52 enum: [0, 1] 52 enum: [0, 1]
53 default: 1 53 default: 1
54 54
55 "#pwm-cells": 55 "#pwm-cells":
56 const: 4 56 const: 4
57 description: | 57 description: |
58 Number of cells in a PWM specifier. 58 Number of cells in a PWM specifier.
59 - 0: The PWM channel 59 - 0: The PWM channel
60 - 1: The PWM period in nanoseconds 60 - 1: The PWM period in nanoseconds
61 - 90909091 (11 Hz) 61 - 90909091 (11 Hz)
62 - 71428571 (14 Hz) 62 - 71428571 (14 Hz)
63 - 45454545 (22 Hz) 63 - 45454545 (22 Hz)
64 - 34482759 (29 Hz) 64 - 34482759 (29 Hz)
65 - 28571429 (35 Hz) 65 - 28571429 (35 Hz)
66 - 22727273 (44 Hz) 66 - 22727273 (44 Hz)
67 - 17241379 (58 Hz) 67 - 17241379 (58 Hz)
68 - 11363636 (88 Hz) 68 - 11363636 (88 Hz)
69 - 44444 (22 kHz) 69 - 44444 (22 kHz)
70 - 2: PWM flags 0 or PWM_POLARITY_INVERTE 70 - 2: PWM flags 0 or PWM_POLARITY_INVERTED
71 - 3: The default PWM duty cycle in nanos 71 - 3: The default PWM duty cycle in nanoseconds
72 72
73 patternProperties: 73 patternProperties:
74 "^adi,bypass-attenuator-in[0-4]$": 74 "^adi,bypass-attenuator-in[0-4]$":
75 description: | 75 description: |
76 Configures bypassing the individual volt 76 Configures bypassing the individual voltage input attenuator. If
77 set to 1 the attenuator is bypassed if s 77 set to 1 the attenuator is bypassed if set to 0 the attenuator is
78 not bypassed. If the property is absent 78 not bypassed. If the property is absent then the attenuator
79 retains its configuration from the bios/ 79 retains its configuration from the bios/bootloader.
80 $ref: /schemas/types.yaml#/definitions/uin 80 $ref: /schemas/types.yaml#/definitions/uint32
81 enum: [0, 1] 81 enum: [0, 1]
82 82
83 "^adi,pin(5|10)-function$": 83 "^adi,pin(5|10)-function$":
84 description: | 84 description: |
85 Configures the function for pin 5 on the 85 Configures the function for pin 5 on the adi,adt7473 and adi,adt7475. Or
86 pin 10 on the adi,adt7476 and adi,adt749 86 pin 10 on the adi,adt7476 and adi,adt7490.
87 $ref: /schemas/types.yaml#/definitions/str 87 $ref: /schemas/types.yaml#/definitions/string
88 enum: 88 enum:
89 - pwm2 89 - pwm2
90 - smbalert# 90 - smbalert#
91 91
92 "^adi,pin(9|14)-function$": 92 "^adi,pin(9|14)-function$":
93 description: | 93 description: |
94 Configures the function for pin 9 on the 94 Configures the function for pin 9 on the adi,adt7473 and adi,adt7475. Or
95 pin 14 on the adi,adt7476 and adi,adt749 95 pin 14 on the adi,adt7476 and adi,adt7490
96 $ref: /schemas/types.yaml#/definitions/str 96 $ref: /schemas/types.yaml#/definitions/string
97 enum: 97 enum:
98 - tach4 98 - tach4
99 - therm# 99 - therm#
100 - smbalert# 100 - smbalert#
101 - gpio 101 - gpio
102 102
103 "^fan-[0-9]+$": 103 "^fan-[0-9]+$":
104 $ref: fan-common.yaml# 104 $ref: fan-common.yaml#
105 unevaluatedProperties: false 105 unevaluatedProperties: false
106 106
107 required: 107 required:
108 - compatible 108 - compatible
109 - reg 109 - reg
110 110
111 additionalProperties: false 111 additionalProperties: false
112 112
113 examples: 113 examples:
114 - | 114 - |
115 #include <dt-bindings/pwm/pwm.h> 115 #include <dt-bindings/pwm/pwm.h>
116 i2c { 116 i2c {
117 #address-cells = <1>; 117 #address-cells = <1>;
118 #size-cells = <0>; 118 #size-cells = <0>;
119 119
120 pwm: hwmon@2e { 120 pwm: hwmon@2e {
121 compatible = "adi,adt7476"; 121 compatible = "adi,adt7476";
122 reg = <0x2e>; 122 reg = <0x2e>;
123 adi,bypass-attenuator-in0 = <1>; 123 adi,bypass-attenuator-in0 = <1>;
124 adi,bypass-attenuator-in1 = <0>; 124 adi,bypass-attenuator-in1 = <0>;
125 adi,pin10-function = "smbalert#"; 125 adi,pin10-function = "smbalert#";
126 adi,pin14-function = "tach4"; 126 adi,pin14-function = "tach4";
127 #pwm-cells = <4>; 127 #pwm-cells = <4>;
128 128
129 /* PWMs at 22.5 kHz frequency, 50% dut 129 /* PWMs at 22.5 kHz frequency, 50% duty*/
130 fan-0 { 130 fan-0 {
131 pwms = <&pwm 0 44444 0 22222>; 131 pwms = <&pwm 0 44444 0 22222>;
132 }; 132 };
133 133
134 fan-1 { 134 fan-1 {
135 pwms = <&pwm 2 44444 0 22222>; 135 pwms = <&pwm 2 44444 0 22222>;
136 }; 136 };
137 }; 137 };
138 }; 138 };
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