This source file includes following definitions.
- ir35221_read_word_data
- ir35221_probe
1
2
3
4
5
6
7
8 #include <linux/err.h>
9 #include <linux/i2c.h>
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include "pmbus.h"
14
15 #define IR35221_MFR_VIN_PEAK 0xc5
16 #define IR35221_MFR_VOUT_PEAK 0xc6
17 #define IR35221_MFR_IOUT_PEAK 0xc7
18 #define IR35221_MFR_TEMP_PEAK 0xc8
19 #define IR35221_MFR_VIN_VALLEY 0xc9
20 #define IR35221_MFR_VOUT_VALLEY 0xca
21 #define IR35221_MFR_IOUT_VALLEY 0xcb
22 #define IR35221_MFR_TEMP_VALLEY 0xcc
23
24 static int ir35221_read_word_data(struct i2c_client *client, int page, int reg)
25 {
26 int ret;
27
28 switch (reg) {
29 case PMBUS_VIRT_READ_VIN_MAX:
30 ret = pmbus_read_word_data(client, page, IR35221_MFR_VIN_PEAK);
31 break;
32 case PMBUS_VIRT_READ_VOUT_MAX:
33 ret = pmbus_read_word_data(client, page, IR35221_MFR_VOUT_PEAK);
34 break;
35 case PMBUS_VIRT_READ_IOUT_MAX:
36 ret = pmbus_read_word_data(client, page, IR35221_MFR_IOUT_PEAK);
37 break;
38 case PMBUS_VIRT_READ_TEMP_MAX:
39 ret = pmbus_read_word_data(client, page, IR35221_MFR_TEMP_PEAK);
40 break;
41 case PMBUS_VIRT_READ_VIN_MIN:
42 ret = pmbus_read_word_data(client, page,
43 IR35221_MFR_VIN_VALLEY);
44 break;
45 case PMBUS_VIRT_READ_VOUT_MIN:
46 ret = pmbus_read_word_data(client, page,
47 IR35221_MFR_VOUT_VALLEY);
48 break;
49 case PMBUS_VIRT_READ_IOUT_MIN:
50 ret = pmbus_read_word_data(client, page,
51 IR35221_MFR_IOUT_VALLEY);
52 break;
53 case PMBUS_VIRT_READ_TEMP_MIN:
54 ret = pmbus_read_word_data(client, page,
55 IR35221_MFR_TEMP_VALLEY);
56 break;
57 default:
58 ret = -ENODATA;
59 break;
60 }
61
62 return ret;
63 }
64
65 static int ir35221_probe(struct i2c_client *client,
66 const struct i2c_device_id *id)
67 {
68 struct pmbus_driver_info *info;
69 u8 buf[I2C_SMBUS_BLOCK_MAX];
70 int ret;
71
72 if (!i2c_check_functionality(client->adapter,
73 I2C_FUNC_SMBUS_READ_BYTE_DATA
74 | I2C_FUNC_SMBUS_READ_WORD_DATA
75 | I2C_FUNC_SMBUS_READ_BLOCK_DATA))
76 return -ENODEV;
77
78 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
79 if (ret < 0) {
80 dev_err(&client->dev, "Failed to read PMBUS_MFR_ID\n");
81 return ret;
82 }
83 if (ret != 2 || strncmp(buf, "RI", strlen("RI"))) {
84 dev_err(&client->dev, "MFR_ID unrecognised\n");
85 return -ENODEV;
86 }
87
88 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
89 if (ret < 0) {
90 dev_err(&client->dev, "Failed to read PMBUS_MFR_MODEL\n");
91 return ret;
92 }
93 if (ret != 2 || !(buf[0] == 0x6c && buf[1] == 0x00)) {
94 dev_err(&client->dev, "MFR_MODEL unrecognised\n");
95 return -ENODEV;
96 }
97
98 info = devm_kzalloc(&client->dev, sizeof(struct pmbus_driver_info),
99 GFP_KERNEL);
100 if (!info)
101 return -ENOMEM;
102
103 info->read_word_data = ir35221_read_word_data;
104
105 info->pages = 2;
106 info->format[PSC_VOLTAGE_IN] = linear;
107 info->format[PSC_VOLTAGE_OUT] = linear;
108 info->format[PSC_CURRENT_IN] = linear;
109 info->format[PSC_CURRENT_OUT] = linear;
110 info->format[PSC_POWER] = linear;
111 info->format[PSC_TEMPERATURE] = linear;
112
113 info->func[0] = PMBUS_HAVE_VIN
114 | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
115 | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
116 | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
117 | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
118 | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP;
119 info->func[1] = info->func[0];
120
121 return pmbus_do_probe(client, id, info);
122 }
123
124 static const struct i2c_device_id ir35221_id[] = {
125 {"ir35221", 0},
126 {}
127 };
128
129 MODULE_DEVICE_TABLE(i2c, ir35221_id);
130
131 static struct i2c_driver ir35221_driver = {
132 .driver = {
133 .name = "ir35221",
134 },
135 .probe = ir35221_probe,
136 .remove = pmbus_do_remove,
137 .id_table = ir35221_id,
138 };
139
140 module_i2c_driver(ir35221_driver);
141
142 MODULE_AUTHOR("Samuel Mendoza-Jonas <sam@mendozajonas.com");
143 MODULE_DESCRIPTION("PMBus driver for IR35221");
144 MODULE_LICENSE("GPL");