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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8186.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Mediatek MT8186 Pin Controller
maintainers:
- Sean Wang <sean.wang@mediatek.com>
description: |
The Mediatek's Pin controller is used to control SoC pins.
properties:
compatible:
const: mediatek,mt8186-pinctrl
gpio-controller: true
'#gpio-cells':
description: |
Number of cells in GPIO specifier. Since the generic GPIO binding is used,
the amount of cells must be specified as 2. See the below
mentioned gpio binding representation for description of particular cells.
const: 2
gpio-ranges:
maxItems: 1
gpio-line-names: true
reg:
description: |
Physical address base for gpio base registers. There are 8 different GPIO
physical address base in mt8186.
maxItems: 8
reg-names:
description: |
Gpio base register names.
items:
- const: iocfg0
- const: iocfg_lt
- const: iocfg_lm
- const: iocfg_lb
- const: iocfg_bl
- const: iocfg_rb
- const: iocfg_rt
- const: eint
interrupt-controller: true
'#interrupt-cells':
const: 2
interrupts:
description: The interrupt outputs to sysirq
maxItems: 1
mediatek,rsel-resistance-in-si-unit:
type: boolean
description: |
Identifying i2c pins pull up/down type which is RSEL. It can support
RSEL define or si unit value(ohm) to set different resistance.
# PIN CONFIGURATION NODES
patternProperties:
'-pins$':
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.
An example of using macro:
pincontroller {
/* GPIO0 set as multifunction GPIO0 */
gpio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
}
};
/* GPIO128 set as multifunction SDA0 */
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
}
};
};
$ref: "pinmux-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 dt-bindings/pinctrl/<soc>-pinfunc.h
directly.
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
drive-strength-microamp:
enum: [125, 250, 500, 1000]
bias-pull-down:
oneOf:
- type: boolean
- enum: [100, 101, 102, 103]
description: mt8186 pull down PUPD/R0/R1 type define value.
- enum: [200, 201, 202, 203]
description: mt8186 pull down RSEL type define value.
- enum: [75000, 5000]
description: mt8186 pull down RSEL type si unit value(ohm).
description: |
For pull down type is normal, it don't need add RSEL & R1R0 define
and resistance value.
For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
"MTK_PUPD_SET_R1R0_11" define in mt8186.
For pull down type is RSEL, it can add RSEL define & resistance
value(ohm) to set different resistance by identifying property
"mediatek,rsel-resistance-in-si-unit".
It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
define in mt8186. It can also support resistance value(ohm)
"75000" & "5000" in mt8186.
An example of using RSEL define:
pincontroller {
i2c0_pin {
pins {
pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
bias-pull-down = <MTK_PULL_SET_RSEL_001>;
}
};
};
An example of using si unit resistance value(ohm):
&pio {
mediatek,rsel-resistance-in-si-unit;
}
pincontroller {
i2c0_pin {
pins {
pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
bias-pull-down = <75000>;
}
};
};
bias-pull-up:
oneOf:
- type: boolean
- enum: [100, 101, 102, 103]
description: mt8186 pull up PUPD/R0/R1 type define value.
- enum: [200, 201, 202, 203]
description: mt8186 pull up RSEL type define value.
- enum: [1000, 5000, 10000, 75000]
description: mt8186 pull up RSEL type si unit value(ohm).
description: |
For pull up type is normal, it don't need add RSEL & R1R0 define
and resistance value.
For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
"MTK_PUPD_SET_R1R0_11" define in mt8186.
For pull up type is RSEL, it can add RSEL define & resistance
value(ohm) to set different resistance by identifying property
"mediatek,rsel-resistance-in-si-unit".
It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
define in mt8186. It can also support resistance value(ohm)
"1000" & "5000" & "10000" & "75000" in mt8186.
An example of using si unit resistance value(ohm):
&pio {
mediatek,rsel-resistance-in-si-unit;
}
pincontroller {
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
bias-pull-up = <1000>;
}
};
};
bias-disable: true
output-high: true
output-low: true
input-enable: true
input-disable: true
input-schmitt-enable: true
input-schmitt-disable: true
required:
- pinmux
required:
- compatible
- reg
- interrupts
- interrupt-controller
- '#interrupt-cells'
- gpio-controller
- '#gpio-cells'
- gpio-ranges
additionalProperties: false
examples:
- |
#include <dt-bindings/pinctrl/mt8186-pinfunc.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
pio: pinctrl@10005000 {
compatible = "mediatek,mt8186-pinctrl";
reg = <0x10005000 0x1000>,
<0x10002000 0x0200>,
<0x10002200 0x0200>,
<0x10002400 0x0200>,
<0x10002600 0x0200>,
<0x10002A00 0x0200>,
<0x10002c00 0x0200>,
<0x1000b000 0x1000>;
reg-names = "iocfg0", "iocfg_lt", "iocfg_lm",
"iocfg_lb", "iocfg_bl", "iocfg_rb",
"iocfg_rt", "eint";
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&pio 0 0 185>;
interrupt-controller;
interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH 0>;
#interrupt-cells = <2>;
pio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
output-low;
};
};
spi0-pins {
pins-spi {
pinmux = <PINMUX_GPIO0__FUNC_SPI0_CLK_B>,
<PINMUX_GPIO1__FUNC_SPI0_CSB_B>,
<PINMUX_GPIO2__FUNC_SPI0_MO_B>;
bias-disable;
};
pins-spi-mi {
pinmux = <PINMUX_GPIO3__FUNC_SPI0_MI_B>;
bias-pull-down;
};
};
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO127__FUNC_SCL0>,
<PINMUX_GPIO128__FUNC_SDA0>;
bias-pull-up = <MTK_PULL_SET_RSEL_001>;
drive-strength-microamp = <1000>;
};
};
};
|
