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
|
/*
* AXP20X and AXP22X PMICs' ACIN power supply driver
*
* Copyright (C) 2016 Free Electrons
* Quentin Schulz <quentin.schulz@free-electrons.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
#define DRVNAME "axp20x-ac-power-supply"
struct axp20x_ac_power {
struct regmap *regmap;
struct power_supply *supply;
struct iio_channel *acin_v;
struct iio_channel *acin_i;
};
static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
{
struct axp20x_ac_power *power = devid;
power_supply_changed(power->supply);
return IRQ_HANDLED;
}
static int axp20x_ac_power_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
int ret, reg;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {
val->intval = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
return 0;
case POWER_SUPPLY_PROP_PRESENT:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);
return 0;
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = iio_read_channel_processed(power->acin_v, &val->intval);
if (ret)
return ret;
/* IIO framework gives mV but Power Supply framework gives uV */
val->intval *= 1000;
return 0;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = iio_read_channel_processed(power->acin_i, &val->intval);
if (ret)
return ret;
/* IIO framework gives mA but Power Supply framework gives uA */
val->intval *= 1000;
return 0;
default:
return -EINVAL;
}
return -EINVAL;
}
static enum power_supply_property axp20x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static enum power_supply_property axp22x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
};
static const struct power_supply_desc axp20x_ac_power_desc = {
.name = "axp20x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp20x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp20x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp22x_ac_power_desc = {
.name = "axp22x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp22x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp22x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
struct axp_data {
const struct power_supply_desc *power_desc;
bool acin_adc;
};
static const struct axp_data axp20x_data = {
.power_desc = &axp20x_ac_power_desc,
.acin_adc = true,
};
static const struct axp_data axp22x_data = {
.power_desc = &axp22x_ac_power_desc,
.acin_adc = false,
};
static int axp20x_ac_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct axp20x_ac_power *power;
const struct axp_data *axp_data;
static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL",
NULL };
int i, irq, ret;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
if (!axp20x) {
dev_err(&pdev->dev, "Parent drvdata not set\n");
return -EINVAL;
}
power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL);
if (!power)
return -ENOMEM;
axp_data = of_device_get_match_data(&pdev->dev);
if (axp_data->acin_adc) {
power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
if (IS_ERR(power->acin_v)) {
if (PTR_ERR(power->acin_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_v);
}
power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");
if (IS_ERR(power->acin_i)) {
if (PTR_ERR(power->acin_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_i);
}
}
power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
platform_set_drvdata(pdev, power);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = power;
power->supply = devm_power_supply_register(&pdev->dev,
axp_data->power_desc,
&psy_cfg);
if (IS_ERR(power->supply))
return PTR_ERR(power->supply);
/* Request irqs after registering, as irqs may trigger immediately */
for (i = 0; irq_names[i]; i++) {
irq = platform_get_irq_byname(pdev, irq_names[i]);
if (irq < 0) {
dev_warn(&pdev->dev, "No IRQ for %s: %d\n",
irq_names[i], irq);
continue;
}
irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
ret = devm_request_any_context_irq(&pdev->dev, irq,
axp20x_ac_power_irq, 0,
DRVNAME, power);
if (ret < 0)
dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n",
irq_names[i], ret);
}
return 0;
}
static const struct of_device_id axp20x_ac_power_match[] = {
{
.compatible = "x-powers,axp202-ac-power-supply",
.data = &axp20x_data,
}, {
.compatible = "x-powers,axp221-ac-power-supply",
.data = &axp22x_data,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
static struct platform_driver axp20x_ac_power_driver = {
.probe = axp20x_ac_power_probe,
.driver = {
.name = DRVNAME,
.of_match_table = axp20x_ac_power_match,
},
};
module_platform_driver(axp20x_ac_power_driver);
MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");
MODULE_LICENSE("GPL");
|
