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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/drivers/acpi/dptf/dptf_power.c
....@@ -1,16 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * dptf_power:  DPTF platform power driver
34  * Copyright (c) 2016, Intel Corporation.
4
- *
5
- * This program is free software; you can redistribute it and/or modify it
6
- * under the terms and conditions of the GNU General Public License,
7
- * version 2, as published by the Free Software Foundation.
8
- *
9
- * This program is distributed in the hope it will be useful, but WITHOUT
10
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12
- * more details.
13
- *
145  */
156 
167 #include <linux/kernel.h>
....@@ -19,20 +10,26 @@
1910 #include <linux/platform_device.h>
2011 
2112 /*
22
- * Presentation of attributes which are defined for INT3407. They are:
13
+ * Presentation of attributes which are defined for INT3407 and INT3532.
14
+ * They are:
2315  * PMAX : Maximum platform powe
2416  * PSRC : Platform power source
2517  * ARTG : Adapter rating
2618  * CTYP : Charger type
2719  * 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
2826  */
2927 #define DPTF_POWER_SHOW(name, object) \
3028 static ssize_t name##_show(struct device *dev,\
3129 			   struct device_attribute *attr,\
3230 			   char *buf)\
3331 {\
34
-	struct platform_device *pdev = to_platform_device(dev);\
35
-	struct acpi_device *acpi_dev = platform_get_drvdata(pdev);\
32
+	struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
3633 	unsigned long long val;\
3734 	acpi_status status;\
3835 \
....@@ -49,12 +46,42 @@
4946 DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
5047 DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
5148 DPTF_POWER_SHOW(charger_type, CTYP)
49
+DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
50
+DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
51
+DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
52
+DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
53
+DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
5254 
5355 static DEVICE_ATTR_RO(max_platform_power_mw);
5456 static DEVICE_ATTR_RO(platform_power_source);
5557 static DEVICE_ATTR_RO(adapter_rating_mw);
5658 static DEVICE_ATTR_RO(battery_steady_power_mw);
5759 static DEVICE_ATTR_RO(charger_type);
60
+static DEVICE_ATTR_RO(rest_of_platform_power_mw);
61
+static DEVICE_ATTR_RO(max_steady_state_power_mw);
62
+static DEVICE_ATTR_RO(high_freq_impedance_mohm);
63
+static DEVICE_ATTR_RO(no_load_voltage_mv);
64
+static DEVICE_ATTR_RO(current_discharge_capbility_ma);
65
+
66
+static 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;
73
+
74
+	if (kstrtouint(buf, 0, &seq_no) < 0)
75
+		return -EINVAL;
76
+
77
+	status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
78
+	if (ACPI_SUCCESS(status))
79
+		return count;
80
+
81
+	return -EINVAL;
82
+}
83
+
84
+static DEVICE_ATTR_WO(prochot_confirm);
5885 
5986 static struct attribute *dptf_power_attrs[] = {
6087 	&dev_attr_max_platform_power_mw.attr,
....@@ -62,6 +89,8 @@
6289 	&dev_attr_adapter_rating_mw.attr,
6390 	&dev_attr_battery_steady_power_mw.attr,
6491 	&dev_attr_charger_type.attr,
92
+	&dev_attr_rest_of_platform_power_mw.attr,
93
+	&dev_attr_prochot_confirm.attr,
6594 	NULL
6695 };
6796 
....@@ -70,10 +99,79 @@
7099 	.name = "dptf_power"
71100 };
72101 
102
+static 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
+
111
+static 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
117
+#define POWER_STATE_CHANGED		0x81
118
+#define STEADY_STATE_POWER_CHANGED	0x83
119
+#define POWER_PROP_CHANGE_EVENT	0x84
120
+#define IMPEDANCED_CHNGED		0x85
121
+#define VOLTAGE_CURRENT_CHANGED	0x86
122
+
123
+static 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
+
135
+static 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;
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
+	 */
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);
169
+}
170
+
73171 static int dptf_power_add(struct platform_device *pdev)
74172 {
173
+	const struct attribute_group *attr_group;
75174 	struct acpi_device *acpi_dev;
76
-	acpi_status status;
77175 	unsigned long long ptype;
78176 	int result;
79177 
....@@ -81,17 +179,29 @@
81179 	if (!acpi_dev)
82180 		return -ENODEV;
83181 
84
-	status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
85
-	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
86188 		return -ENODEV;
87189 
88
-	if (ptype != 0x11)
89
-		return -ENODEV;
90
-
91
-	result = sysfs_create_group(&pdev->dev.kobj,
92
-				    &dptf_power_attribute_group);
190
+	result = acpi_install_notify_handler(acpi_dev->handle,
191
+					     ACPI_DEVICE_NOTIFY,
192
+					     dptf_power_notify,
193
+					     (void *)pdev);
93194 	if (result)
94195 		return result;
196
+
197
+	result = sysfs_create_group(&pdev->dev.kobj,
198
+				    attr_group);
199
+	if (result) {
200
+		acpi_remove_notify_handler(acpi_dev->handle,
201
+					   ACPI_DEVICE_NOTIFY,
202
+					   dptf_power_notify);
203
+		return result;
204
+	}
95205 
96206 	platform_set_drvdata(pdev, acpi_dev);
97207 
....@@ -100,14 +210,27 @@
100210 
101211 static int dptf_power_remove(struct platform_device *pdev)
102212 {
213
+	struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
103214 
104
-	sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
215
+	acpi_remove_notify_handler(acpi_dev->handle,
216
+				   ACPI_DEVICE_NOTIFY,
217
+				   dptf_power_notify);
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);
105223 
106224 	return 0;
107225 }
108226 
109227 static const struct acpi_device_id int3407_device_ids[] = {
110228 	{"INT3407", 0},
229
+	{"INT3532", 0},
230
+	{"INTC1047", 0},
231
+	{"INTC1050", 0},
232
+	{"INTC1060", 0},
233
+	{"INTC1061", 0},
111234 	{"", 0},
112235 };
113236 MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
....@@ -116,7 +239,7 @@
116239 	.probe = dptf_power_add,
117240 	.remove = dptf_power_remove,
118241 	.driver = {
119
-		.name = "DPTF Platform Power",
242
+		.name = "dptf_power",
120243 		.acpi_match_table = int3407_device_ids,
121244 	},
122245 };