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9#include <linux/err.h>
10#include <linux/hwmon-sysfs.h>
11#include <linux/i2c.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/string.h>
16#include <linux/sysfs.h>
17#include "pmbus.h"
18
19#define ISL68137_VOUT_AVS 0x30
20
21static ssize_t isl68137_avs_enable_show_page(struct i2c_client *client,
22 int page,
23 char *buf)
24{
25 int val = pmbus_read_byte_data(client, page, PMBUS_OPERATION);
26
27 return sprintf(buf, "%d\n",
28 (val & ISL68137_VOUT_AVS) == ISL68137_VOUT_AVS ? 1 : 0);
29}
30
31static ssize_t isl68137_avs_enable_store_page(struct i2c_client *client,
32 int page,
33 const char *buf, size_t count)
34{
35 int rc, op_val;
36 bool result;
37
38 rc = kstrtobool(buf, &result);
39 if (rc)
40 return rc;
41
42 op_val = result ? ISL68137_VOUT_AVS : 0;
43
44
45
46
47
48
49
50
51 if (op_val == ISL68137_VOUT_AVS) {
52 rc = pmbus_read_word_data(client, page, PMBUS_VOUT_COMMAND);
53 if (rc < 0)
54 return rc;
55
56 rc = pmbus_write_word_data(client, page, PMBUS_VOUT_COMMAND,
57 rc);
58 if (rc < 0)
59 return rc;
60 }
61
62 rc = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
63 ISL68137_VOUT_AVS, op_val);
64
65 return (rc < 0) ? rc : count;
66}
67
68static ssize_t isl68137_avs_enable_show(struct device *dev,
69 struct device_attribute *devattr,
70 char *buf)
71{
72 struct i2c_client *client = to_i2c_client(dev->parent);
73 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
74
75 return isl68137_avs_enable_show_page(client, attr->index, buf);
76}
77
78static ssize_t isl68137_avs_enable_store(struct device *dev,
79 struct device_attribute *devattr,
80 const char *buf, size_t count)
81{
82 struct i2c_client *client = to_i2c_client(dev->parent);
83 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
84
85 return isl68137_avs_enable_store_page(client, attr->index, buf, count);
86}
87
88static SENSOR_DEVICE_ATTR_RW(avs0_enable, isl68137_avs_enable, 0);
89static SENSOR_DEVICE_ATTR_RW(avs1_enable, isl68137_avs_enable, 1);
90
91static struct attribute *enable_attrs[] = {
92 &sensor_dev_attr_avs0_enable.dev_attr.attr,
93 &sensor_dev_attr_avs1_enable.dev_attr.attr,
94 NULL,
95};
96
97static const struct attribute_group enable_group = {
98 .attrs = enable_attrs,
99};
100
101static const struct attribute_group *attribute_groups[] = {
102 &enable_group,
103 NULL,
104};
105
106static struct pmbus_driver_info isl68137_info = {
107 .pages = 2,
108 .format[PSC_VOLTAGE_IN] = direct,
109 .format[PSC_VOLTAGE_OUT] = direct,
110 .format[PSC_CURRENT_IN] = direct,
111 .format[PSC_CURRENT_OUT] = direct,
112 .format[PSC_POWER] = direct,
113 .format[PSC_TEMPERATURE] = direct,
114 .m[PSC_VOLTAGE_IN] = 1,
115 .b[PSC_VOLTAGE_IN] = 0,
116 .R[PSC_VOLTAGE_IN] = 3,
117 .m[PSC_VOLTAGE_OUT] = 1,
118 .b[PSC_VOLTAGE_OUT] = 0,
119 .R[PSC_VOLTAGE_OUT] = 3,
120 .m[PSC_CURRENT_IN] = 1,
121 .b[PSC_CURRENT_IN] = 0,
122 .R[PSC_CURRENT_IN] = 2,
123 .m[PSC_CURRENT_OUT] = 1,
124 .b[PSC_CURRENT_OUT] = 0,
125 .R[PSC_CURRENT_OUT] = 1,
126 .m[PSC_POWER] = 1,
127 .b[PSC_POWER] = 0,
128 .R[PSC_POWER] = 0,
129 .m[PSC_TEMPERATURE] = 1,
130 .b[PSC_TEMPERATURE] = 0,
131 .R[PSC_TEMPERATURE] = 0,
132 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN
133 | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2
134 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
135 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
136 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
137 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
138 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
139 .groups = attribute_groups,
140};
141
142static int isl68137_probe(struct i2c_client *client,
143 const struct i2c_device_id *id)
144{
145 return pmbus_do_probe(client, id, &isl68137_info);
146}
147
148static const struct i2c_device_id isl68137_id[] = {
149 {"isl68137", 0},
150 {}
151};
152
153MODULE_DEVICE_TABLE(i2c, isl68137_id);
154
155
156static struct i2c_driver isl68137_driver = {
157 .driver = {
158 .name = "isl68137",
159 },
160 .probe = isl68137_probe,
161 .remove = pmbus_do_remove,
162 .id_table = isl68137_id,
163};
164
165module_i2c_driver(isl68137_driver);
166
167MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
168MODULE_DESCRIPTION("PMBus driver for Intersil ISL68137");
169MODULE_LICENSE("GPL");
170
