dptf_power.c (668ce99e4ed4c07bb14465f80492bc6cf76ed3c9) dptf_power.c (7b52b200cf5bdd04f3ee22121960bd6f4ec5efa1)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * dptf_power: DPTF platform power driver
4 * Copyright (c) 2016, Intel Corporation.
5 */
6
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/acpi.h>
10#include <linux/platform_device.h>
11
12/*
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * dptf_power: DPTF platform power driver
4 * Copyright (c) 2016, Intel Corporation.
5 */
6
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/acpi.h>
10#include <linux/platform_device.h>
11
12/*
13 * Presentation of attributes which are defined for INT3407. They are:
13 * Presentation of attributes which are defined for INT3407 and INT3532.
14 * They are:
14 * PMAX : Maximum platform powe
15 * PSRC : Platform power source
16 * ARTG : Adapter rating
17 * CTYP : Charger type
18 * PBSS : Battery steady power
19 * PROP : Rest of worst case platform Power
15 * PMAX : Maximum platform powe
16 * PSRC : Platform power source
17 * ARTG : Adapter rating
18 * CTYP : Charger type
19 * PBSS : Battery steady power
20 * PROP : Rest of worst case platform Power
21 * PBSS : Power Battery Steady State
22 * PBSS : Power Battery Steady State
23 * RBHF : High Frequency Impedance
24 * VBNL : Instantaneous No-Load Voltage
25 * CMPP : Current Discharge Capability
20 */
21#define DPTF_POWER_SHOW(name, object) \
22static ssize_t name##_show(struct device *dev,\
23 struct device_attribute *attr,\
24 char *buf)\
25{\
26 struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
27 unsigned long long val;\

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36}
37
38DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
39DPTF_POWER_SHOW(platform_power_source, PSRC)
40DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
41DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
42DPTF_POWER_SHOW(charger_type, CTYP)
43DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
26 */
27#define DPTF_POWER_SHOW(name, object) \
28static ssize_t name##_show(struct device *dev,\
29 struct device_attribute *attr,\
30 char *buf)\
31{\
32 struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
33 unsigned long long val;\

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42}
43
44DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
45DPTF_POWER_SHOW(platform_power_source, PSRC)
46DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
47DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
48DPTF_POWER_SHOW(charger_type, CTYP)
49DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
50DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
51DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
52DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
53DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
44
45static DEVICE_ATTR_RO(max_platform_power_mw);
46static DEVICE_ATTR_RO(platform_power_source);
47static DEVICE_ATTR_RO(adapter_rating_mw);
48static DEVICE_ATTR_RO(battery_steady_power_mw);
49static DEVICE_ATTR_RO(charger_type);
50static DEVICE_ATTR_RO(rest_of_platform_power_mw);
54
55static DEVICE_ATTR_RO(max_platform_power_mw);
56static DEVICE_ATTR_RO(platform_power_source);
57static DEVICE_ATTR_RO(adapter_rating_mw);
58static DEVICE_ATTR_RO(battery_steady_power_mw);
59static DEVICE_ATTR_RO(charger_type);
60static DEVICE_ATTR_RO(rest_of_platform_power_mw);
61static DEVICE_ATTR_RO(max_steady_state_power_mw);
62static DEVICE_ATTR_RO(high_freq_impedance_mohm);
63static DEVICE_ATTR_RO(no_load_voltage_mv);
64static DEVICE_ATTR_RO(current_discharge_capbility_ma);
51
52static ssize_t prochot_confirm_store(struct device *dev,
53 struct device_attribute *attr,
54 const char *buf, size_t count)
55{
56 struct acpi_device *acpi_dev = dev_get_drvdata(dev);
57 acpi_status status;
58 int seq_no;

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80 NULL
81};
82
83static const struct attribute_group dptf_power_attribute_group = {
84 .attrs = dptf_power_attrs,
85 .name = "dptf_power"
86};
87
65
66static ssize_t prochot_confirm_store(struct device *dev,
67 struct device_attribute *attr,
68 const char *buf, size_t count)
69{
70 struct acpi_device *acpi_dev = dev_get_drvdata(dev);
71 acpi_status status;
72 int seq_no;

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94 NULL
95};
96
97static const struct attribute_group dptf_power_attribute_group = {
98 .attrs = dptf_power_attrs,
99 .name = "dptf_power"
100};
101
102static struct attribute *dptf_battery_attrs[] = {
103 &dev_attr_max_platform_power_mw.attr,
104 &dev_attr_max_steady_state_power_mw.attr,
105 &dev_attr_high_freq_impedance_mohm.attr,
106 &dev_attr_no_load_voltage_mv.attr,
107 &dev_attr_current_discharge_capbility_ma.attr,
108 NULL
109};
110
111static const struct attribute_group dptf_battery_attribute_group = {
112 .attrs = dptf_battery_attrs,
113 .name = "dptf_battery"
114};
115
116#define MAX_POWER_CHANGED 0x80
88#define POWER_STATE_CHANGED 0x81
117#define POWER_STATE_CHANGED 0x81
118#define STEADY_STATE_POWER_CHANGED 0x83
89#define POWER_PROP_CHANGE_EVENT 0x84
119#define POWER_PROP_CHANGE_EVENT 0x84
120#define IMPEDANCED_CHNGED 0x85
121#define VOLTAGE_CURRENT_CHANGED 0x86
90
122
123static long long dptf_participant_type(acpi_handle handle)
124{
125 unsigned long long ptype;
126 acpi_status status;
127
128 status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
129 if (ACPI_FAILURE(status))
130 return -ENODEV;
131
132 return ptype;
133}
134
91static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
92{
93 struct platform_device *pdev = data;
94 char *attr;
95
96 switch (event) {
97 case POWER_STATE_CHANGED:
98 attr = "platform_power_source";
99 break;
100 case POWER_PROP_CHANGE_EVENT:
101 attr = "rest_of_platform_power_mw";
102 break;
135static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
136{
137 struct platform_device *pdev = data;
138 char *attr;
139
140 switch (event) {
141 case POWER_STATE_CHANGED:
142 attr = "platform_power_source";
143 break;
144 case POWER_PROP_CHANGE_EVENT:
145 attr = "rest_of_platform_power_mw";
146 break;
147 case MAX_POWER_CHANGED:
148 attr = "max_platform_power_mw";
149 break;
150 case STEADY_STATE_POWER_CHANGED:
151 attr = "max_steady_state_power_mw";
152 break;
153 case VOLTAGE_CURRENT_CHANGED:
154 attr = "no_load_voltage_mv";
155 break;
103 default:
104 dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
105 return;
106 }
107
108 /*
109 * Notify that an attribute is changed, so that user space can read
110 * again.
111 */
156 default:
157 dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
158 return;
159 }
160
161 /*
162 * Notify that an attribute is changed, so that user space can read
163 * again.
164 */
112 sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
165 if (dptf_participant_type(handle) == 0x0CULL)
166 sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
167 else
168 sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
113}
114
115static int dptf_power_add(struct platform_device *pdev)
116{
169}
170
171static int dptf_power_add(struct platform_device *pdev)
172{
173 const struct attribute_group *attr_group;
117 struct acpi_device *acpi_dev;
174 struct acpi_device *acpi_dev;
118 acpi_status status;
119 unsigned long long ptype;
120 int result;
121
122 acpi_dev = ACPI_COMPANION(&(pdev->dev));
123 if (!acpi_dev)
124 return -ENODEV;
125
175 unsigned long long ptype;
176 int result;
177
178 acpi_dev = ACPI_COMPANION(&(pdev->dev));
179 if (!acpi_dev)
180 return -ENODEV;
181
126 status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
127 if (ACPI_FAILURE(status))
182 ptype = dptf_participant_type(acpi_dev->handle);
183 if (ptype == 0x11)
184 attr_group = &dptf_power_attribute_group;
185 else if (ptype == 0x0C)
186 attr_group = &dptf_battery_attribute_group;
187 else
128 return -ENODEV;
129
188 return -ENODEV;
189
130 if (ptype != 0x11)
131 return -ENODEV;
132
133 result = acpi_install_notify_handler(acpi_dev->handle,
134 ACPI_DEVICE_NOTIFY,
135 dptf_power_notify,
136 (void *)pdev);
137 if (result)
138 return result;
139
140 result = sysfs_create_group(&pdev->dev.kobj,
190 result = acpi_install_notify_handler(acpi_dev->handle,
191 ACPI_DEVICE_NOTIFY,
192 dptf_power_notify,
193 (void *)pdev);
194 if (result)
195 return result;
196
197 result = sysfs_create_group(&pdev->dev.kobj,
141 &dptf_power_attribute_group);
198 attr_group);
142 if (result) {
143 acpi_remove_notify_handler(acpi_dev->handle,
144 ACPI_DEVICE_NOTIFY,
145 dptf_power_notify);
146 return result;
147 }
148
149 platform_set_drvdata(pdev, acpi_dev);
150
151 return 0;
152}
153
154static int dptf_power_remove(struct platform_device *pdev)
155{
156 struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
157
158 acpi_remove_notify_handler(acpi_dev->handle,
159 ACPI_DEVICE_NOTIFY,
160 dptf_power_notify);
199 if (result) {
200 acpi_remove_notify_handler(acpi_dev->handle,
201 ACPI_DEVICE_NOTIFY,
202 dptf_power_notify);
203 return result;
204 }
205
206 platform_set_drvdata(pdev, acpi_dev);
207
208 return 0;
209}
210
211static int dptf_power_remove(struct platform_device *pdev)
212{
213 struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
214
215 acpi_remove_notify_handler(acpi_dev->handle,
216 ACPI_DEVICE_NOTIFY,
217 dptf_power_notify);
161 sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
162
218
219 if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
220 sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
221 else
222 sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
223
163 return 0;
164}
165
166static const struct acpi_device_id int3407_device_ids[] = {
167 {"INT3407", 0},
224 return 0;
225}
226
227static const struct acpi_device_id int3407_device_ids[] = {
228 {"INT3407", 0},
229 {"INT3532", 0},
168 {"INTC1047", 0},
169 {"", 0},
170};
171MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
172
173static struct platform_driver dptf_power_driver = {
174 .probe = dptf_power_add,
175 .remove = dptf_power_remove,
176 .driver = {
177 .name = "DPTF Platform Power",
178 .acpi_match_table = int3407_device_ids,
179 },
180};
181
182module_platform_driver(dptf_power_driver);
183
184MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
185MODULE_LICENSE("GPL v2");
186MODULE_DESCRIPTION("ACPI DPTF platform power driver");
230 {"INTC1047", 0},
231 {"", 0},
232};
233MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
234
235static struct platform_driver dptf_power_driver = {
236 .probe = dptf_power_add,
237 .remove = dptf_power_remove,
238 .driver = {
239 .name = "DPTF Platform Power",
240 .acpi_match_table = int3407_device_ids,
241 },
242};
243
244module_platform_driver(dptf_power_driver);
245
246MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
247MODULE_LICENSE("GPL v2");
248MODULE_DESCRIPTION("ACPI DPTF platform power driver");