diff options
Diffstat (limited to 'drivers/hwmon/pmbus/tps53679.c')
-rw-r--r-- | drivers/hwmon/pmbus/tps53679.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/tps53679.c b/drivers/hwmon/pmbus/tps53679.c new file mode 100644 index 000000000000..85b515cd9df0 --- /dev/null +++ b/drivers/hwmon/pmbus/tps53679.c | |||
@@ -0,0 +1,113 @@ | |||
1 | /* | ||
2 | * Hardware monitoring driver for Texas Instruments TPS53679 | ||
3 | * | ||
4 | * Copyright (c) 2017 Mellanox Technologies. All rights reserved. | ||
5 | * Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com> | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | */ | ||
17 | |||
18 | #include <linux/err.h> | ||
19 | #include <linux/i2c.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/kernel.h> | ||
22 | #include <linux/module.h> | ||
23 | #include "pmbus.h" | ||
24 | |||
25 | #define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */ | ||
26 | #define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */ | ||
27 | #define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC */ | ||
28 | #define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */ | ||
29 | #define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */ | ||
30 | #define TPS53679_PAGE_NUM 2 | ||
31 | |||
32 | static int tps53679_identify(struct i2c_client *client, | ||
33 | struct pmbus_driver_info *info) | ||
34 | { | ||
35 | u8 vout_params; | ||
36 | int ret; | ||
37 | |||
38 | /* Read the register with VOUT scaling value.*/ | ||
39 | ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE); | ||
40 | if (ret < 0) | ||
41 | return ret; | ||
42 | |||
43 | vout_params = ret & GENMASK(4, 0); | ||
44 | |||
45 | switch (vout_params) { | ||
46 | case TPS53679_PROT_VR13_10MV: | ||
47 | case TPS53679_PROT_VR12_5_10MV: | ||
48 | info->vrm_version = vr13; | ||
49 | break; | ||
50 | case TPS53679_PROT_VR13_5MV: | ||
51 | case TPS53679_PROT_VR12_5MV: | ||
52 | case TPS53679_PROT_IMVP8_5MV: | ||
53 | info->vrm_version = vr12; | ||
54 | break; | ||
55 | default: | ||
56 | return -EINVAL; | ||
57 | } | ||
58 | |||
59 | return 0; | ||
60 | } | ||
61 | |||
62 | static struct pmbus_driver_info tps53679_info = { | ||
63 | .pages = TPS53679_PAGE_NUM, | ||
64 | .format[PSC_VOLTAGE_IN] = linear, | ||
65 | .format[PSC_VOLTAGE_OUT] = vid, | ||
66 | .format[PSC_TEMPERATURE] = linear, | ||
67 | .format[PSC_CURRENT_OUT] = linear, | ||
68 | .format[PSC_POWER] = linear, | ||
69 | .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | ||
70 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | ||
71 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | ||
72 | PMBUS_HAVE_POUT, | ||
73 | .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | | ||
74 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | | ||
75 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | | ||
76 | PMBUS_HAVE_POUT, | ||
77 | .identify = tps53679_identify, | ||
78 | }; | ||
79 | |||
80 | static int tps53679_probe(struct i2c_client *client, | ||
81 | const struct i2c_device_id *id) | ||
82 | { | ||
83 | return pmbus_do_probe(client, id, &tps53679_info); | ||
84 | } | ||
85 | |||
86 | static const struct i2c_device_id tps53679_id[] = { | ||
87 | {"tps53679", 0}, | ||
88 | {} | ||
89 | }; | ||
90 | |||
91 | MODULE_DEVICE_TABLE(i2c, tps53679_id); | ||
92 | |||
93 | static const struct of_device_id tps53679_of_match[] = { | ||
94 | {.compatible = "ti,tps53679"}, | ||
95 | {} | ||
96 | }; | ||
97 | MODULE_DEVICE_TABLE(of, tps53679_of_match); | ||
98 | |||
99 | static struct i2c_driver tps53679_driver = { | ||
100 | .driver = { | ||
101 | .name = "tps53679", | ||
102 | .of_match_table = of_match_ptr(tps53679_of_match), | ||
103 | }, | ||
104 | .probe = tps53679_probe, | ||
105 | .remove = pmbus_do_remove, | ||
106 | .id_table = tps53679_id, | ||
107 | }; | ||
108 | |||
109 | module_i2c_driver(tps53679_driver); | ||
110 | |||
111 | MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); | ||
112 | MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679"); | ||
113 | MODULE_LICENSE("GPL"); | ||