1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8183-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Mediatek MT8183 Pin Controller
maintainers:
- Sean Wang <sean.wang@kernel.org>
description: |+
The MediaTek's MT8183 Pin controller is used to control SoC pins.
properties:
compatible:
const: mediatek,mt8183-pinctrl
reg:
minItems: 10
maxItems: 10
reg-names:
items:
- const: iocfg0
- const: iocfg1
- const: iocfg2
- const: iocfg3
- const: iocfg4
- const: iocfg5
- const: iocfg6
- const: iocfg7
- const: iocfg8
- const: eint
gpio-controller: true
"#gpio-cells":
const: 2
description: |
Number of cells in GPIO specifier. Since the generic GPIO
binding is used, the amount of cells must be specified as 2. See the below
mentioned gpio binding representation for description of particular cells.
gpio-ranges:
minItems: 1
maxItems: 5
description: |
GPIO valid number range.
interrupt-controller: true
interrupts:
maxItems: 1
"#interrupt-cells":
const: 2
allOf:
- $ref: "pinctrl.yaml#"
required:
- compatible
- reg
- gpio-controller
- "#gpio-cells"
- gpio-ranges
patternProperties:
'-[0-9]+$':
type: object
additionalProperties: false
patternProperties:
'pins':
type: object
additionalProperties: false
description: |
A pinctrl node should contain at least one subnodes representing the
pinctrl groups available on the machine. Each subnode will list the
pins it needs, and how they should be configured, with regard to muxer
configuration, pullups, drive strength, input enable/disable and input
schmitt.
$ref: "/schemas/pinctrl/pincfg-node.yaml"
properties:
pinmux:
description:
integer array, represents gpio pin number and mux setting.
Supported pin number and mux varies for different SoCs, and are
defined as macros in <soc>-pinfunc.h directly.
bias-disable: true
bias-pull-up: true
bias-pull-down: true
input-enable: true
input-disable: true
output-low: true
output-high: true
input-schmitt-enable: true
input-schmitt-disable: true
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
mediatek,drive-strength-adv:
description: |
Describe the specific driving setup property.
For I2C pins, the existing generic driving setup can only support
2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they
can support 0.125/0.25/0.5/1mA adjustment. If we enable specific
driving setup, the existing generic setup will be disabled.
The specific driving setup is controlled by E1E0EN.
When E1=0/E0=0, the strength is 0.125mA.
When E1=0/E0=1, the strength is 0.25mA.
When E1=1/E0=0, the strength is 0.5mA.
When E1=1/E0=1, the strength is 1mA.
EN is used to enable or disable the specific driving setup.
Valid arguments are described as below:
0: (E1, E0, EN) = (0, 0, 0)
1: (E1, E0, EN) = (0, 0, 1)
2: (E1, E0, EN) = (0, 1, 0)
3: (E1, E0, EN) = (0, 1, 1)
4: (E1, E0, EN) = (1, 0, 0)
5: (E1, E0, EN) = (1, 0, 1)
6: (E1, E0, EN) = (1, 1, 0)
7: (E1, E0, EN) = (1, 1, 1)
So the valid arguments are from 0 to 7.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3, 4, 5, 6, 7]
mediatek,pull-up-adv:
description: |
Pull up setings for 2 pull resistors, R0 and R1. User can
configure those special pins. Valid arguments are described as below:
0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
mediatek,pull-down-adv:
description: |
Pull down settings for 2 pull resistors, R0 and R1. User can
configure those special pins. Valid arguments are described as below:
0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
mediatek,tdsel:
description: |
An integer describing the steps for output level shifter duty
cycle when asserted (high pulse width adjustment). Valid arguments
are from 0 to 15.
$ref: /schemas/types.yaml#/definitions/uint32
mediatek,rdsel:
description: |
An integer describing the steps for input level shifter duty cycle
when asserted (high pulse width adjustment). Valid arguments are
from 0 to 63.
$ref: /schemas/types.yaml#/definitions/uint32
required:
- pinmux
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/pinctrl/mt8183-pinfunc.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
pio: pinctrl@10005000 {
compatible = "mediatek,mt8183-pinctrl";
reg = <0 0x10005000 0 0x1000>,
<0 0x11f20000 0 0x1000>,
<0 0x11e80000 0 0x1000>,
<0 0x11e70000 0 0x1000>,
<0 0x11e90000 0 0x1000>,
<0 0x11d30000 0 0x1000>,
<0 0x11d20000 0 0x1000>,
<0 0x11c50000 0 0x1000>,
<0 0x11f30000 0 0x1000>,
<0 0x1000b000 0 0x1000>;
reg-names = "iocfg0", "iocfg1", "iocfg2",
"iocfg3", "iocfg4", "iocfg5",
"iocfg6", "iocfg7", "iocfg8",
"eint";
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&pio 0 0 192>;
interrupt-controller;
interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>;
#interrupt-cells = <2>;
i2c0_pins_a: i2c-0 {
pins1 {
pinmux = <PINMUX_GPIO48__FUNC_SCL5>,
<PINMUX_GPIO49__FUNC_SDA5>;
mediatek,pull-up-adv = <3>;
mediatek,drive-strength-adv = <7>;
};
};
i2c1_pins_a: i2c-1 {
pins {
pinmux = <PINMUX_GPIO50__FUNC_SCL3>,
<PINMUX_GPIO51__FUNC_SDA3>;
mediatek,pull-down-adv = <2>;
mediatek,drive-strength-adv = <4>;
};
};
};
};
|
