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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* dptf_power: DPTF platform power driver
* Copyright (c) 2016, Intel Corporation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
/*
* Presentation of attributes which are defined for INT3407 and INT3532.
* They are:
* PMAX : Maximum platform powe
* PSRC : Platform power source
* ARTG : Adapter rating
* CTYP : Charger type
* PBSS : Battery steady power
* PROP : Rest of worst case platform Power
* PBSS : Power Battery Steady State
* PBSS : Power Battery Steady State
* RBHF : High Frequency Impedance
* VBNL : Instantaneous No-Load Voltage
* CMPP : Current Discharge Capability
*/
#define DPTF_POWER_SHOW(name, object) \
static ssize_t name##_show(struct device *dev,\
struct device_attribute *attr,\
char *buf)\
{\
struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
unsigned long long val;\
acpi_status status;\
\
status = acpi_evaluate_integer(acpi_dev->handle, #object,\
NULL, &val);\
if (ACPI_SUCCESS(status))\
return sprintf(buf, "%d\n", (int)val);\
else \
return -EINVAL;\
}
DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
DPTF_POWER_SHOW(platform_power_source, PSRC)
DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
DPTF_POWER_SHOW(charger_type, CTYP)
DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
static DEVICE_ATTR_RO(max_platform_power_mw);
static DEVICE_ATTR_RO(platform_power_source);
static DEVICE_ATTR_RO(adapter_rating_mw);
static DEVICE_ATTR_RO(battery_steady_power_mw);
static DEVICE_ATTR_RO(charger_type);
static DEVICE_ATTR_RO(rest_of_platform_power_mw);
static DEVICE_ATTR_RO(max_steady_state_power_mw);
static DEVICE_ATTR_RO(high_freq_impedance_mohm);
static DEVICE_ATTR_RO(no_load_voltage_mv);
static DEVICE_ATTR_RO(current_discharge_capbility_ma);
static ssize_t prochot_confirm_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi_dev = dev_get_drvdata(dev);
acpi_status status;
int seq_no;
if (kstrtouint(buf, 0, &seq_no) < 0)
return -EINVAL;
status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
if (ACPI_SUCCESS(status))
return count;
return -EINVAL;
}
static DEVICE_ATTR_WO(prochot_confirm);
static struct attribute *dptf_power_attrs[] = {
&dev_attr_max_platform_power_mw.attr,
&dev_attr_platform_power_source.attr,
&dev_attr_adapter_rating_mw.attr,
&dev_attr_battery_steady_power_mw.attr,
&dev_attr_charger_type.attr,
&dev_attr_rest_of_platform_power_mw.attr,
&dev_attr_prochot_confirm.attr,
NULL
};
static const struct attribute_group dptf_power_attribute_group = {
.attrs = dptf_power_attrs,
.name = "dptf_power"
};
static struct attribute *dptf_battery_attrs[] = {
&dev_attr_max_platform_power_mw.attr,
&dev_attr_max_steady_state_power_mw.attr,
&dev_attr_high_freq_impedance_mohm.attr,
&dev_attr_no_load_voltage_mv.attr,
&dev_attr_current_discharge_capbility_ma.attr,
NULL
};
static const struct attribute_group dptf_battery_attribute_group = {
.attrs = dptf_battery_attrs,
.name = "dptf_battery"
};
#define MAX_POWER_CHANGED 0x80
#define POWER_STATE_CHANGED 0x81
#define STEADY_STATE_POWER_CHANGED 0x83
#define POWER_PROP_CHANGE_EVENT 0x84
#define IMPEDANCED_CHNGED 0x85
#define VOLTAGE_CURRENT_CHANGED 0x86
static long long dptf_participant_type(acpi_handle handle)
{
unsigned long long ptype;
acpi_status status;
status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
if (ACPI_FAILURE(status))
return -ENODEV;
return ptype;
}
static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
{
struct platform_device *pdev = data;
char *attr;
switch (event) {
case POWER_STATE_CHANGED:
attr = "platform_power_source";
break;
case POWER_PROP_CHANGE_EVENT:
attr = "rest_of_platform_power_mw";
break;
case MAX_POWER_CHANGED:
attr = "max_platform_power_mw";
break;
case STEADY_STATE_POWER_CHANGED:
attr = "max_steady_state_power_mw";
break;
case VOLTAGE_CURRENT_CHANGED:
attr = "no_load_voltage_mv";
break;
default:
dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
return;
}
/*
* Notify that an attribute is changed, so that user space can read
* again.
*/
if (dptf_participant_type(handle) == 0x0CULL)
sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
else
sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
}
static int dptf_power_add(struct platform_device *pdev)
{
const struct attribute_group *attr_group;
struct acpi_device *acpi_dev;
unsigned long long ptype;
int result;
acpi_dev = ACPI_COMPANION(&(pdev->dev));
if (!acpi_dev)
return -ENODEV;
ptype = dptf_participant_type(acpi_dev->handle);
if (ptype == 0x11)
attr_group = &dptf_power_attribute_group;
else if (ptype == 0x0C)
attr_group = &dptf_battery_attribute_group;
else
return -ENODEV;
result = acpi_install_notify_handler(acpi_dev->handle,
ACPI_DEVICE_NOTIFY,
dptf_power_notify,
(void *)pdev);
if (result)
return result;
result = sysfs_create_group(&pdev->dev.kobj,
attr_group);
if (result) {
acpi_remove_notify_handler(acpi_dev->handle,
ACPI_DEVICE_NOTIFY,
dptf_power_notify);
return result;
}
platform_set_drvdata(pdev, acpi_dev);
return 0;
}
static int dptf_power_remove(struct platform_device *pdev)
{
struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
acpi_remove_notify_handler(acpi_dev->handle,
ACPI_DEVICE_NOTIFY,
dptf_power_notify);
if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
else
sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
return 0;
}
static const struct acpi_device_id int3407_device_ids[] = {
{"INT3407", 0},
{"INT3532", 0},
{"INTC1047", 0},
{"INTC1050", 0},
{"INTC1060", 0},
{"INTC1061", 0},
{"INTC10A4", 0},
{"INTC10A5", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
static struct platform_driver dptf_power_driver = {
.probe = dptf_power_add,
.remove = dptf_power_remove,
.driver = {
.name = "dptf_power",
.acpi_match_table = int3407_device_ids,
},
};
module_platform_driver(dptf_power_driver);
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ACPI DPTF platform power driver");
|
